Joan E. Friedenberg v. School Board of Palm Beach County , 911 F.3d 1084 ( 2018 )


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  •               Case: 17-12935     Date Filed: 12/20/2018    Page: 1 of 54
    [PUBLISH]
    IN THE UNITED STATES COURT OF APPEALS
    FOR THE ELEVENTH CIRCUIT
    ________________________
    No. 17-12935
    ________________________
    D.C. Docket No. 9:17-cv-80221-RLR
    JOAN E. FRIEDENBERG,
    on behalf of herself and a class of similarly situated individuals,
    Plaintiff-Appellant,
    versus
    SCHOOL BOARD OF PALM BEACH COUNTY,
    Defendant-Appellee.
    ________________________
    Appeal from the United States District Court
    for the Southern District of Florida
    ________________________
    (December 20, 2018)
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    Before ED CARNES, Chief Judge, MARCUS, and EBEL, ∗ Circuit Judges.
    MARCUS, Circuit Judge:
    A suspicionless search by the government is presumptively unconstitutional.
    So goes the basic hornbook law of the Fourth Amendment. The details are a bit
    more complex. Suspicionless searches are permissible in a narrow band of cases
    where they serve sufficiently powerful and unique public needs. The force of these
    needs depends heavily on the context in which the search takes place.
    At issue today is a matter of first impression -- whether a county school
    board may require all applicants for substitute teacher positions to submit to and
    pass a drug test as a condition of employment. That is, to put it more directly,
    whether the Palm Beach County School Board (the “School Board”) may, without
    any suspicion of wrongdoing, collect and search -- by testing -- the urine of all
    prospective substitute teachers. We think that the School Board has a sufficiently
    compelling interest in screening its prospective teachers to justify this invasion of
    the privacy rights of job applicants, and thus conclude that the School Board has
    not violated the constitutional mandate barring unreasonable searches and seizures.
    As we see it, ensuring the safety of millions of schoolchildren in the mandatory
    supervision and care of the state, and ensuring and impressing a drug-free
    ∗ Honorable David M. Ebel, United States Circuit Judge for the Tenth Circuit, sitting by
    designation.
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    environment in our classrooms, are compelling concerns. Because we recognize
    today a special need to conduct such testing, and because the balance of interests
    weighs heavily in its favor, we hold that the suspicionless testing of substitute
    teacher applicants in Palm Beach County is permissible and affirm the district
    court’s denial of a preliminary injunction.
    I.
    A.
    Joan Friedenberg applied for several advertised positions -- tutor, substitute
    teacher, and early childhood aide -- in the Palm Beach County School District.
    Among other things, the online application required Friedenberg to agree to be
    tested for drugs. In February 2017, Friedenberg received a conditional offer to
    become a substitute teacher. She was told, however, that she would need to be
    fingerprinted -- for a full background check -- and would need to pass a drug test
    before she could be officially hired. Friedenberg was fingerprinted but refused to
    submit to drug testing.
    Since our constitutional analysis depends in substantial measure on the
    specific facts and the unique circumstances found in our public schools, we are
    obliged to examine closely the testing protocol adopted by the School District, the
    efficacy of the testing regime, and the duties and responsibilities of substitute
    public school teachers. The drug testing was required under the School District’s
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    “Drug and Alcohol-Free Workplace” policy, which provides for drug testing to be
    performed in conformity with Florida’s Administrative Code. See Fla. Admin
    Code. R. 59A-24.005(3). The policy required, among other things, pre-
    employment drug testing of all job applicants. The relevant provision read this
    way:
    Pre-employment screening will be required of all applicants before
    employment with the District. Any applicant who tests positive in the
    pre-employment screening for a drug as defined in this Policy will not
    be hired and is not eligible to re-apply for employment with the
    District for one year following the confirmed positive test.
    The School District has a separate policy requiring suspicionless drug testing of
    those employees and volunteers who perform “safety-sensitive functions,” mostly
    involving the operation of commercial vehicles.1
    Under the pre-employment drug-testing policy, the applicant typically
    provides a urine sample in the privacy of a bathroom stall. Fla. Admin Code. R.
    59A-24.005(3). While the applicant provides the sample, collection site staff
    remain in the room, but outside the stall. Fla. Admin Code. R. 59A-
    24.005(3)(c)(7). Before collection, applicants are asked to wash their hands, empty
    their pockets, remove outer clothing, and place all personal belongings aside. Fla.
    1
    In relevant part, the safety-sensitive employee testing policy provides that “[a]ll applicants for
    employment in any covered position safety-sensitive position [sic] . . . shall undergo drug and
    alcohol testing as a condition precedent to employment . . . . Any applicant who tests positive in
    the pre-employment screening . . . is not eligible for employment with the District.”
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    Admin Code. R. 59A-24.005(3)(c)(5)–(6). A wallet may be kept, but staff may
    search it for contaminants. Fla. Admin Code. R. 59A-24.005(3)(c)(5). After
    collection, the testing staff observe the urine sample for evidence of tampering.
    Fla. Admin Code. R. 59A-24.005(3)(c)(12). If tampering is suspected, a
    supervisor may approve collection of a second sample under direct observation by
    a person of the same gender as the applicant. Fla. Admin Code. R. 59A-
    24.005(3)(c)(13). Drug-tested applicants are also required to disclose all
    medications they are taking before being tested.
    Select information from the drug testing is reported to the School Board.
    Among other things, positive test results, including the substance or substances for
    which the specimen tested positive, are reported. The reports also indicate whether
    an individual refused testing or left the testing site. Five individuals within the
    School Board’s Department of Risk and Benefits Management receive this
    information. The results are held in a “confidential electronic medical folder” and
    are not reported to any law enforcement official. The hiring school site or
    department is informed only that the applicant did not pass a medical examination.
    Moreover, self-disclosed information about medications is seen only by the
    collection staff and a review officer -- a position the District outsources.
    Testing under this policy has revealed relatively few positive results. In
    2016, 4,965 job applicants were subject to the District’s pre-employment
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    screening. Of that total, forty individuals were disqualified by testing positive or
    failing to submit to the drug test. The disqualifications included thirty-three
    positive tests and seven individuals who refused to take the test or left the testing
    site. That is, of 4,958 job applicants who submitted to drug testing, 0.67 percent
    tested positive. Twenty-seven of the thirty-three positive tests were positive for
    marijuana; three more were positive for benzodiazepines (antianxiety drugs), two
    for cocaine, and one for opiates.
    Among the forty job applicants disqualified by the drug testing regime were
    twenty-five applicants for noninstructional roles and fifteen applicants for
    instructional roles, including six substitute teacher applicants. Of the six
    disqualified substitute teacher applicants, four tested positive for marijuana, one
    tested positive for cocaine, and one refused to take the test. Eleven of the forty
    disqualified applicants began work with the District and worked for some time
    before the results of the drug test disqualified them, including three teachers and a
    coach. Notably, the record does not reflect how many applicants for substitute
    teachers -- or how many applicants for instructional positions -- were tested of the
    total number of job applicants tested during the 2016 year. Nor is there any
    empirical data addressing how many would-be applicants for instructional
    positions were deterred by the County’s drug-testing regime.
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    The typical workday of a substitute teacher in the School District includes
    five to six hours of classroom time, generally alone with students. Before the
    school day, substitute teachers check in and are seen by others, such as a school
    principal, in the school office; they also check out at the office at the end of the
    day. During the day, substitutes may be monitored by supervisors or by other
    teachers through classroom visits or perhaps when taking students to lunch, recess,
    or other locations. Substitute teachers also have a variety of safety-related
    responsibilities which include monitoring students for safety purposes, such as
    preventing or stopping fights; reporting and addressing hazards or other unsafe
    circumstances; detecting and promptly responding to student health issues;
    detecting and reporting student drug use or possession; and reporting suspected
    child abuse. As the Chief of the County’s school district police explained, school
    personnel, including substitute teachers, are “on the frontlines of securing the
    campus and are often the first responders to any given incident.”
    According to the School District’s Substitute Teacher Handbook, a
    substitute teacher’s specific responsibilities include addressing student behavior
    and emergencies. Thus, for example, any complaint about student illness “should
    receive immediate attention.” Student accidents must be reported immediately as
    well. And control of the classroom is characterized as “a primary concern.” The
    Handbook further provides: “It is [the substitute teacher’s] responsibility to discuss
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    any limitation or restriction with the substitute contact before [the substitute
    teacher] begin[s] the assignment so that [the substitute teacher] will be prepared to
    provide safety and accountability for students in any situation and at all times.”
    And the Handbook says that substitutes are “as legally responsible for students,
    equipment, and materials as is the regular teacher.”
    B.
    In February 2017, Friedenberg sued the School Board in the United States
    District Court for the Southern District of Florida, claiming that the requirement of
    suspicionless drug testing of School District employment applicants violated the
    Fourth Amendment. She sought class action relief, describing the putative class as
    including “[a]ll job applicants for non-safety-sensitive positions with the Palm
    Beach County School District.” Friedenberg sought declaratory and injunctive
    relief.
    Friedenberg moved the district court for preliminary injunctive relief,
    arguing, among other things, that she could establish a substantial likelihood of
    success on the merits. After conducting a hearing, the district court denied
    preliminary injunctive relief. As an initial matter, the district court determined that
    Friedenberg had established standing to challenge only the application of the drug-
    testing policy to substitute teachers, not as to all School District employment
    applicants. Therefore, the court addressed only suspicionless drug testing of
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    substitute teacher applicants. The district court also concluded that the School
    Board had established a special need to conduct suspicionless drug testing of
    substitute teacher applicants. It explained that even “a momentary lapse of
    attention . . . could be the difference between life and death,” and that while “the
    magnitude of the public safety risk presented by an impaired teacher is not
    comparable to that presented by an impaired railway operator or armed customs
    official,” the special responsibility of substitute teachers for “the care of society’s
    most vulnerable members” was distinct and notable.
    The district court then determined that the balance of interests strongly
    favored the policy of suspicionless testing of substitute teacher applicants. And
    though Friedenberg’s privacy interests were implicated in the testing regime, the
    district court concluded that the urinalysis was a “relatively noninvasive” process
    and the testing regime was “not unduly intrusive.” The court found that “although
    the efficacy of the scheme is not beyond question, the need asserted by [the School
    Board] -- the protection of the children under a substitute teacher’s charge -- is
    compelling indeed.” Accordingly, Friedenberg had not established a substantial
    likelihood of success on the merits.
    Friedenberg then filed this interlocutory appeal.
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    II.
    We review the denial of a preliminary injunction for abuse of discretion.
    See, e.g., Siegel v. LePore, 
    234 F.3d 1163
    , 1175 (11th Cir. 2000) (en banc). A
    preliminary injunction may be entered when a plaintiff establishes four elements:
    “(1) a substantial likelihood of success on the merits; (2) a substantial threat of
    irreparable injury; (3) that the threatened injury to the plaintiff outweighs the
    potential harm to the defendant; and (4) that the injunction will not disserve the
    public interest.” Palmer v. Braun, 
    287 F.3d 1325
    , 1329 (11th Cir. 2002) (citing
    Suntrust Bank v. Houghton Mifflin Co., 
    268 F.3d 1257
    , 1265 (11th Cir. 2001)).
    Here the district court determined that a preliminary injunction was not warranted
    because Friedenberg had not shown a substantial likelihood of success on the
    merits. The heart of this dispute surrounds whether, on this preliminary record,
    there is a substantial likelihood that the drug testing policy violates the Fourth
    Amendment. We hold that there is not.
    The Fourth Amendment protects the “right of the people to be secure in their
    persons . . . against unreasonable searches and seizures.” U.S. Const. amend. IV.
    Undeniably the school district’s urinalysis drug tests are searches that implicate the
    Fourth Amendment. See, e.g., Nat’l Treasury Emps. Union v. Von Raab, 
    489 U.S. 656
    , 665 (1989). We consider whether the search is a reasonable one.
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    “The default rule in this context . . . is that ‘to be reasonable under the
    Fourth Amendment, a search ordinarily must be based on individualized suspicion
    of wrongdoing.’” AFSCME v. Scott, 
    717 F.3d 851
    , 866 (11th Cir. 2013) (quoting
    Chandler v. Miller, 
    520 U.S. 305
    , 313 (1997)). However, “neither a warrant nor
    probable cause, nor, indeed, any measure of individualized suspicion, is an
    indispensable component of reasonableness in every circumstance.” Von Raab,
    
    489 U.S. at 665
    . The Supreme Court has developed a narrow exception to the
    Fourth Amendment expectation of individualized suspicion where a search “serves
    special governmental needs.” Id.; Griffin v. Wisconsin, 
    483 U.S. 868
    , 873 (1987)
    (search made without individualized suspicion of wrongdoing can be reasonable
    “when special needs, beyond the normal need for law enforcement, make the
    warrant and probable-cause requirement impracticable” (quotation omitted)). The
    special need must raise a “concern[] other than crime detection,” and in order to
    satisfy the Fourth Amendment, the special need must be “substantial -- important
    enough to override the individual’s acknowledged privacy interest, sufficiently
    vital to suppress the Fourth Amendment’s normal requirement of individualized
    suspicion.” Chandler v. Miller, 
    520 U.S. 305
    , 314, 318 (1997).
    When a special need is claimed, we are obliged to “undertake a context-
    specific inquiry, examining closely the competing private and public interests
    advanced by the parties.” 
    Id. at 314
    . And “[i]n limited circumstances, where the
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    privacy interests implicated by the search are minimal, and where an important
    governmental interest furthered by the intrusion would be placed in jeopardy by a
    requirement of individualized suspicion, a search may be reasonable despite the
    absence of such suspicion.” Skinner v. Ry. Labor Execs. Ass’n, 
    489 U.S. 602
    , 624
    (1989). As we wrote in AFSCME v. Scott, 
    717 F.3d 851
     (11th Cir. 2013), a
    “‘compelling state interest,’ in the Fourth Amendment context, [does not describe]
    a fixed, minimum quantum of governmental concern.” 
    Id.
     at 717 F.3d at 867
    (quotations omitted). Resolving a case like this one requires identifying what
    interest the government has, then measuring the weight of that interest and,
    eventually, balancing it against other factors. See id.
    Our consideration of the merits then is twofold. Once a plaintiff has shown
    that the government conducted a search without individualized suspicion -- which
    the School Board concedes -- the burden shifts to the government to establish that
    it has a “special need” sufficient to warrant departure from the Fourth
    Amendment’s baseline requirement of individualized suspicion. See Id. at 880. If
    a special need is presented, we “undertake a context-specific inquiry, examining
    closely the competing private and public interests advanced by the parties to
    determine the reasonableness of the search.” Lebron v. Sec’y, Fla. Dep’t of
    Children & Families, 
    710 F.3d 1202
    , 1207 (11th Cir. 2013) (quotation omitted).
    At this balancing stage, “the ultimate burden of persuasion remains squarely on the
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    plaintiff.” AFSCME, 717 F.3d at 880. On this record, and in the unique context of
    public schools, we are satisfied that the School Board’s testing regime as applied to
    substitute teacher applicants is a reasonable one, and the district court committed
    no abuse of discretion in denying a preliminary injunction.
    III.
    Neither the Supreme Court nor this Court has ever faced the question
    whether there is a sufficiently compelling need to justify the invasion of privacy
    entailed in suspicionless drug testing of public school teachers. But we are not
    writing on a blank slate. The Supreme Court has considered the constitutionality
    of suspicionless drug-testing regimes five times in the past thirty years. It has
    found special needs compelling enough to permit suspicionless drug testing of
    public school students participating in extracurricular activities and also of
    government employees whose work implicates public safety.
    A.
    For our purposes, the relevant precedent begins with the Supreme Court’s
    declaration that, for Fourth Amendment purposes, public schools are unique. In
    New Jersey v. T.L.O., 
    469 U.S. 325
     (1985), the Court set out as a foundational
    principle that “[a]lthough the underlying command of the Fourth Amendment is
    always that searches and seizures be reasonable, what is reasonable depends on the
    context within which a search takes place.” 
    Id. at 337
    . In that case, a student had
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    been caught smoking in a school lavatory and a school administrator had searched
    her purse. 
    Id. at 328
    . It will come as no surprise that the administrator, an
    Assistant Vice Principal, had not sought or obtained a warrant before performing
    this search. See 
    id.
     The Assistant Vice Principal was a state actor and the Fourth
    Amendment was applicable to this warrantless search, see 
    id. at 336
    , but the Court
    held that the search was constitutional, 
    id.
     at 332–33.
    The Court weighed the student’s privacy interests against “the school’s
    equally legitimate need to maintain an environment in which learning can take
    place.” 
    Id. at 340
    . Students had “perfectly legitimate reasons” to bring personal
    property to school, and to expect some level of privacy against searches of that
    property. See 
    id.
     at 338–39. Notwithstanding “the difficulty of maintaining
    discipline in the public schools,” “the situation [was] not so dire” that schools
    would be treated, for Fourth Amendment purposes, like prisons, and students
    treated like prisoners who had no “legitimate expectations of privacy.” 
    Id. at 338
    (noting that a prisoner’s interest in privacy was negligible when compared to the
    government interest in preserving order in prisons) (quoting Ingraham v. Wright,
    
    430 U.S. 651
    , 669 (1977)). School officials, nonetheless, had a “substantial
    interest . . . in maintaining discipline in the classroom and on school grounds.” Id.
    at 339. To do this required “close supervision” and “the enforcement of rules
    against conduct that would be perfectly permissible if undertaken by an adult.” Id.
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    Balancing these competing values, the Court determined that the need for
    school administrators to preserve order tipped the scales against the student’s
    interest in privacy. See id. at 340–43. Students would not be stripped of their
    privacy interests under the Fourth Amendment, but their rights would be less
    robust than a typical adult’s right to be free from a search by a typical government
    agent. At the core of the Court’s holding was “the need to maintain an
    environment in which learning [could] take place.” Id. at 340. The school setting
    itself “require[d] some easing of the restrictions to which searches by public
    authorities are ordinarily subject.” Id.
    Going forward, the Court has taken to describing contexts, like schools,
    where the warrant requirement has been relaxed, as presenting “special needs.”
    This terminology was coined by Justice Blackmun, concurring in the judgment in
    T.L.O., who described the school setting as among “those exceptional
    circumstances in which special needs, beyond the normal need for law
    enforcement, make the warrant and probable-cause requirement
    impracticable . . . .” Id. at 351 (Blackmun, J., concurring in the judgment). Justice
    Blackmun’s terminology was adopted by a majority of the Court in O’Connor v.
    Ortega, 
    480 U.S. 709
     (1987), which held that “special needs” were also present in
    government workplaces. 
    Id. at 725
     (plurality opinion); 
    id. at 732
     (Scalia, J.,
    concurring in the judgment). There, a plurality held that public employers could
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    conduct searches of employees’ offices, desks, filing cabinets, and the like, without
    warrants. See 
    id.
     at 725–26 (plurality opinion). If a public employer intruded on
    an employee’s protected privacy interest through a “legitimate work-related”
    search or an “investigation[] of work related misconduct,” the employer’s search
    “[would] be judged by the standard of reasonableness.” 
    Id. at 725
    . Later that same
    Term, the Court found that “special needs, beyond the normal need for law
    enforcement” also justified reasonable, warrantless searches of a probationer’s
    home by probation officers. See Griffin, 
    483 U.S. at
    875–76.
    The “special needs” that justified warrantless searches in schools returned in
    two drug-testing cases that are highly instructive for our analysis today. In the first
    of these, Vernonia School District 47J v. Acton, 
    515 U.S. 646
     (1995), the Supreme
    Court considered suspicionless drug testing of student athletes in an Oregon public
    school district. The district, after observing an increase in drug use and drug-
    related problems among the student body, had required all students participating in
    school athletics to take drug tests. 
    Id.
     at 649–50. The Court upheld this testing
    regime as constitutional. 
    Id. at 666
    . Citing T.L.O., the Court emphasized that it
    had previously “found . . . ‘special needs’ to exist in the public school context.” 
    Id.
    at 653 (citing T.L.O., 
    469 U.S. at
    340–41). These special needs were critical for
    the Court, which observed in no uncertain terms that “Fourth Amendment
    rights . . . are different in public schools than elsewhere.” Id. at 656. In the end,
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    the Court concluded that the school context was determinative. Id. at 665 (“We
    caution against the assumption that suspicionless drug testing will readily pass
    constitutional muster in other contexts. The most significant element . . . [is] that
    the Policy was undertaken in furtherance of the government’s responsibilities,
    under a public school system, as guardian and tutor of children entrusted to its
    care.”).
    Vernonia’s reasoning differed from T.L.O.’s, though, in that Vernonia also
    focused on the status of students, who it identified as “(1) children, who (2) have
    been committed to the temporary custody of the State as schoolmaster.” Id. at 654.
    Children “lack some of the most fundamental rights of self-determination” and
    “are subject . . . to the control of their parents or guardians.” Id. School teachers
    and administrators “stand in loco parentis over the children entrusted to them.” Id.
    at 654. They exercise a “degree of supervision and control that could not be
    exercised over free adults.” Id. at 655.
    While “reasonableness” remained the touchstone for measuring the
    lawfulness of a Fourth Amendment search, the school setting and the status of
    students informed what would be reasonable: “the ‘reasonableness’ inquiry cannot
    disregard the schools’ custodial and tutelary responsibility for children.” Id. at
    656. In schools, students “have a lesser expectation of privacy than members of
    the population generally,” and student athletes could expect even less privacy than
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    typical students. Id. at 657 (quoting T.L.O., 
    469 U.S. at 348
     (Powell, J.,
    concurring)). The Court considered the government’s interest in deterring drug use
    by schoolchildren and the efficacy of this testing regime in furthering that interest.
    See 
    id.
     at 661–64. Ultimately, “the relevant question is whether the search is one
    that a reasonable guardian or tutor might undertake.” Id. 665.
    Seven years later, in Board of Education v. Earls, 
    536 U.S. 822
     (2002), the
    Supreme Court once again upheld suspicionless drug testing of public school
    students. This time, the policy in question provided for suspicionless drug testing
    of all students participating in any competitive extracurricular activities -- not just
    athletics but “the Academic Team, Future Farmers of America, Future
    Homemakers of America, band, choir, pom pon, [and] cheerleading.” 
    Id. at 826
    .
    These students were “required to take a drug test before participating in an
    extracurricular activity, [and had to] submit to random drug testing while
    participating in that activity.” 
    Id.
     Once again, the Court emphasized the unique
    setting of our public schools for Fourth Amendment purposes. 
    Id. at 830
    . Looking
    to Vernonia and T.L.O., the Court reiterated that “Fourth Amendment rights are
    different in public schools.” 
    Id.
     at 829–30 (quoting Vernonia, 
    515 U.S. at 656
    )
    (alteration adopted). Indeed, again in Earls, “the context of the public school
    environment serve[d] as the backdrop for the analysis of the privacy interest at
    stake and the reasonableness of the drug testing policy in general.” Id. at 830.
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    And still again the Supreme Court concluded that our public schools had a
    sufficiently compelling interest in the prevention and deterrence of student drug
    use to create a “special need” for Fourth Amendment purposes. Id. at 838.
    The Court elaborated on the unique nature of the school setting. Students
    have reduced privacy interests “in a public school environment where the State is
    responsible for maintaining discipline, health, and safety.” Id. at 830. Schools
    have a responsibility to maintain control, drawn from the need to educate and to
    create an environment conducive to learning. Id. at 831 (quoting New Jersey v.
    T.L.O., 
    469 U.S. 325
    , 350 (1985) (Powell, J., concurring)). Just as in previous
    cases, the Court considered “the nature of the privacy interest,” id. at 830, and “the
    character of the intrusion,” id. at 832, as balanced against “the nature and
    immediacy of the government’s concerns and the efficacy of the Policy in meeting
    them,” id. at 834. And just like in T.L.O. and Vernonia, the warrantless searches
    passed constitutional muster. Id. at 838.
    B.
    In two cases that arose outside the school context, the Court identified still
    other versions of “special needs,” and made it abundantly clear that adult
    government employees in some safety-sensitive positions could be required to pass
    suspicionless drug tests as a condition of their employment.
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    The first of these cases was Skinner v. Railway Labor Executives Ass’n, 
    489 U.S. 602
     (1989). There, the Supreme Court concluded that the government had a
    sufficiently compelling reason to test railroad employees who had been involved in
    railroad accidents,2 because “[t]he Government’s interest in regulating the conduct
    of railroad employees to ensure safety . . . present[ed] special needs beyond normal
    law enforcement that may justify departures from the usual warrant and probable-
    cause requirements.” 
    Id. at 620
    . Evidence had established that “on-the-job
    intoxication was a significant problem in the railroad industry,” and that in about a
    decade, there had been twenty-one significant accidents causing deaths and injuries
    that had involved alcohol or drug use. 
    Id. at 607
    . The delay imposed by a warrant
    requirement would frustrate detection of misconduct because alcohol and certain
    other drugs would leave the bloodstream before they could be detected. See 
    id. at 623
    . Skinner established the basic proposition that the government had an
    important interest in safety because the protection of life and property depended on
    railroad employees working effectively. 
    Id. at 620
    .
    Though the Court did not speak in comparative terms, the “special needs”
    presented in Skinner carried, in some ways, higher stakes than those the Court had
    2
    Technically, the drug tests at issue in Skinner were required and performed by private
    employers -- railroad companies -- but were conducted in accordance with regulations governing
    these employers that had been promulgated by the Federal Railroad Administration. See
    Skinner, 
    489 U.S. at
    608–12; 614–16. There were sufficient indicia of “the Government’s
    encouragement, endorsement, and participation [in the testing regime],” and thus the Fourth
    Amendment was implicated. 
    Id.
     at 615–16.
    20
    Case: 17-12935     Date Filed: 12/20/2018    Page: 21 of 54
    identified in the school cases. The railroad employees were “engaged in safety-
    sensitive tasks” and the testing regime served not just to maintain order or promote
    a particular type of environment, but to “prevent accidents and casualties in
    railroad operations that result from impairment of employees by alcohol or drugs.”
    
    Id.
     at 620–21 (quoting 
    49 C.F.R. § 219.1
    (a) (1987)). These employees
    “discharge[d] duties fraught with such risks of injury to others that even a
    momentary lapse of attention c[ould] have disastrous consequences.” Id. at 628.
    Moreover, the employees had diminished privacy expectations because of “their
    participation in an industry that is regulated pervasively to ensure safety.” Id. at
    627. Those in safety-sensitive roles could “cause great human loss” if impaired by
    drug or alcohol use, and impairment might not be outwardly apparent before a
    serious incident occurred. Id. at 628. Accordingly, “the Government’s compelling
    interests outweigh[ed] privacy concerns.” Id. at 633.
    On the same day Skinner was handed down, the Supreme Court also upheld
    the suspicionless urine testing of two distinct groups of safety-sensitive Customs
    Service employees: those applying for positions directly involved in drug
    interdiction and those applying for positions that would require carrying a firearm.
    Von Raab, 
    489 U.S. 664
    . Testing was performed after qualification for the
    position but before beginning in either role. Id. at 661. The testing regime, the
    government urged, was about both prevention and deterrence. It was meant “to
    21
    Case: 17-12935     Date Filed: 12/20/2018    Page: 22 of 54
    deter drug use among those eligible for promotion to sensitive positions . . . and to
    prevent the promotion of drug users to those positions.” Id. at 666. These dual
    needs “present[ed] a special need that may justify departure from the ordinary
    warrant and probable-cause requirements” of the Fourth Amendment. Id.
    Von Raab relied heavily on the unique functions performed by these
    Customs employees. Id. at 668. Customs employees did not all face the moment-
    to-moment life-and-death situations that railroad employees did, but, the Customs
    Service was, as the Court put it, “our Nation’s first line of defense against one of
    the greatest problems affecting the health and welfare of our population” -- drug
    smuggling. Id. The Supreme Court suggested that employees involved in drug
    interdiction could be tested because drug users would be “unsympathetic to their
    mission of interdicting narcotics,” or might even actively participate in a drug
    trafficking scheme. Id. at 670. These employees also were at risk of physical
    violence by traffickers, temptation from access to seized drugs, and susceptible to
    being targeted for bribery. Id. at 669. The government thus had a “compelling
    interest” in ensuring that those employees were “physically fit, and [had]
    unimpeachable integrity and judgment.” Id. at 670. Moreover, employees whose
    jobs required them to carry firearms “discharge[d] duties fraught with such risks of
    injury to others that even a momentary lapse of attention c[ould] have disastrous
    consequences.” Id. (quoting Skinner, 
    489 U.S. at 628
    ).
    22
    Case: 17-12935     Date Filed: 12/20/2018    Page: 23 of 54
    The Court concluded that, when balancing the interests involved, “the
    Government’s need to conduct the suspicionless searches . . . outweigh[ed] the
    privacy interests of employees engaged directly in drug interdiction, and of those
    who otherwise are required to carry firearms.” 
    Id. at 668
    . Like the employees in
    Skinner, Customs Service employees entering these specialized roles had
    diminished expectations of privacy because they could reasonably expect they
    would be subjected to additional precautions and inquiries. 
    Id. at 672
    . While
    collecting urine could be a “substantial” invasion of privacy in other settings, the
    workplace can “render entirely reasonable certain work-related intrusions . . . that
    might be viewed as unreasonable in other contexts.” 
    Id. at 671
    . The “compelling
    interests in safety and in the integrity of our borders” outweighed the privacy
    interests implicated, and so the testing was found to be reasonable. 
    Id. at 672, 677
    .
    In this Court, we’ve said that “the principle we draw from Skinner is that
    government employees engaged in safety-sensitive tasks . . . may be subject to
    suspicionless drug testing.” AFSCME, 717 F.3d at 867 (quotation omitted and
    alteration adopted). The same principle could be discerned from Von Raab,
    applied in that instance to a different set of employees engaged in safety-sensitive
    tasks. Overall, these “safety-sensitive” cases “conducted the special-needs
    balancing test . . . in a fact-intensive manner that paid due consideration to the
    characteristics of a particular job category (e.g., the degree of risk that mistakes on
    23
    Case: 17-12935      Date Filed: 12/20/2018    Page: 24 of 54
    the job pose to public safety), the important privacy interests at stake, and other
    context-specific concerns.” AFSCME, 717 F.3d at 873. In AFSCME v. Scott, 
    717 F.3d 851
     (11th Cir. 2013), we required the State of Florida to make a similarly
    “specific showing” of special needs for any category of state employee that it
    wanted to subject to mandatory suspicionless drug testing. See id. at 882 (rejecting
    as overbroad a state executive order requiring all state agencies to test all
    employees, see id. at 858, 882–83).
    Only one time has the Supreme Court struck down a suspicionless drug-
    testing regime as being unreasonable. In Chandler v. Miller, 
    520 U.S. 305
     (1997),
    Georgia had required candidates for elected state offices to certify that they passed
    a test for illegal drugs. 
    Id. at 309
    . The Court held that this policy did “not fit
    within the closely guarded category of constitutionally permissible suspicionless
    searches.” 
    Id.
     Georgia asserted that drug use would “draw[] into question an
    official’s judgment and integrity,” would “jeopardize[] the discharge of public
    functions,” and would “undermine[] public confidence and trust in elected
    officials,” 
    id. at 318
    , but the Court rejected the idea that these concerns presented a
    “special need” substantial enough to justify suspicionless, warrantless searches.
    None of the reasons offered established “any indication of a concrete danger” or
    demonstrated that the “hazards . . . are real and not simply hypothetical.” 
    Id. at 319
    . There was no history of an ongoing problem with drug abuse, which,
    24
    Case: 17-12935     Date Filed: 12/20/2018   Page: 25 of 54
    although not strictly necessary, “would shore up an assertion of special need” by
    helping clarify “the precise hazards posed.” 
    Id.
     There was “no reason why
    ordinary law enforcement methods would not suffice to apprehend such addicted
    individuals.” 
    Id. at 320
    . And there was little reason to think that anyone but the
    “prohibitively addicted” would actually be ensnared by the test. 
    Id.
    C.
    In short, Supreme Court precedent boils down to this: searches must be
    reasonable; to determine whether a warrantless search is reasonable, we consider
    whether the government has demonstrated a “special need” to circumvent the
    warrant requirement, and, if so, we weigh this against the public and private
    interests at stake. See Lebron, 710 F.3d at 1206–07. This calculus is highly
    dependent on the context of the search and the status or role of the person being
    searched, and it plays out uniquely in schools, where teachers and administrators
    have a “legitimate need to maintain an environment in which learning can take
    place.” T.L.O., 
    469 U.S. at 340
    ; see 
    id.
     at 340–43; see also Earls, 
    536 U.S. at 831
    (“Securing order in the school environment sometimes requires that students be
    subjected to greater controls than those appropriate for adults.”). In many
    circumstances, students in schools can be required to take drug tests because of the
    unique context of the school and because teachers and administrators are
    responsible for their wellbeing. See Earls, 
    536 U.S. at 838
    . Still another line of
    25
    Case: 17-12935     Date Filed: 12/20/2018    Page: 26 of 54
    cases tells us that where drug use or intoxication would present a significant risk to
    public safety, adult employees in safety-sensitive positions may be tested.
    Chandler, 
    520 U.S. at 323
    . The testing regime instituted by the School Board of
    Palm Beach County implicates the entirety of the Court’s precedent and requires
    that we synthesize the cases addressing searches in schools with those addressing
    safety-sensitive positions.
    IV.
    To determine whether the government has demonstrated a “special need”
    justifying a departure from probable cause and warrant requirements, we first
    evaluate the danger against which the testing regime is intended to guard; that is,
    the danger posed by drug-addicted teachers in the classroom. We conclude that a
    special need is evident. The danger posed by intoxicated teachers is significant
    and it is “readily apparent” that the School Board “has a compelling interest in
    ensuring” that teachers -- including substitutes -- are not habitual drug users. Von
    Raab, 
    489 U.S. at 670
    ; cf. 
    id.
     (“It is readily apparent that the Government has a
    compelling interest in ensuring that front-line interdiction personnel are physically
    fit, and have unimpeachable integrity and judgment.”).
    The School Board asks us to hold that substitute teachers occupy uniquely
    safety-sensitive positions or, alternatively, that that the public school context gives
    rise to a powerful need to protect students. We agree with the bottom line that a
    26
    Case: 17-12935      Date Filed: 12/20/2018    Page: 27 of 54
    “special need” is present in this case, but would formulate it somewhat differently,
    as an intersection of the two possibilities, rather than as a direct outgrowth of one
    or the other. Teachers do not sacrifice as many rights upon entering a school as
    students do; and instructing schoolchildren is not as safety-sensitive as operating a
    railroad. Nonetheless, we find that, in the unique Fourth Amendment context of a
    public school, teachers are in a sufficiently safety-sensitive position so that
    guaranteeing a safe and effective learning environment presents a compelling need
    to justify suspicionless drug testing.
    In order to evaluate the danger posed by substitute teacher drug use, we
    begin with the long-accepted notion that danger is measured by how likely it is that
    harm will occur and how serious that harm will be if it does occur. Here, the first
    variable, the probability of harm, is itself a function of the likelihood that a teacher
    will be intoxicated and the likelihood that a dangerous situation will arise. In most
    instances, one or the other would not, alone, cause the type of harm we see as
    relevant here. Our calculation does not end with this figure, though. As Judge
    Learned Hand famously put it, negligence is determined not just by the probability
    of harm but also by “the gravity of the resulting injury.” United States v. Carroll
    Towing Co., 
    159 F.2d 169
    , 173 (2d Cir. 1947). The danger, then, against which
    the testing regime is intended to guard may be measured by (a) the likelihood that a
    teacher will be intoxicated; (b) the likelihood that a dangerous and urgent situation
    27
    Case: 17-12935     Date Filed: 12/20/2018    Page: 28 of 54
    will arise in school to which that teacher cannot effectively respond; and (c) the
    gravity of harm that would occur if that teacher fails to respond effectively. While
    the first of these probabilities may not be particularly high, a serious danger is
    nonetheless present because the second and third are quite high indeed.
    To state the obvious, our schools have a singular custodial and tutelary
    responsibility for our nation’s most precious resource -- our children. Parents are
    compelled, under force of law, to place their children in the care of the schools.
    Our teachers -- substitute or otherwise -- are directly given the responsibility to
    ensure the safety and protection of our children. Each family sending a child into
    the care and custody of the schools is counting on these teachers not only to
    educate them, but to keep them safe. It is to them that we look to safeguard the
    classroom and protect our students. Like teachers, substitute teachers are on the
    front lines. After all, students are at school all day long. Teachers have close
    interaction with students as young as five and as old as eighteen for the better part
    of every school day for many years of their lives.
    While we cannot predict when or where a substitute teacher will face a
    situation in which a child’s health or safety is at stake, we know with confidence
    that these situations will occur. There are many, many students in our nation’s
    public schools: some 50.7 million of them this fall. See Fast Facts, National
    Center for Education Statistics, https://nces.ed.gov/FastFacts/. It takes no complex
    28
    Case: 17-12935    Date Filed: 12/20/2018    Page: 29 of 54
    statistical formulation to recognize that serious emergencies arise all the time in the
    classroom and in the school yard: kids get sick, injured, or into fights. The public
    schools take prophylactic steps to ensure, as best they can, the safety of their
    charges. By law, each district school board in Florida must establish policies and
    procedures for safety, including safety training and risk assessment. 
    Fla. Stat. § 1006.07
    . Some required precautions help schools prepare for particular
    emergencies, like Florida’s requirement that schools with athletics programs have
    an automated external defibrillator available and ensure training in its operation.
    
    Id.
     § 1006.165. More generally, an obvious and basic step necessary to ensure
    student safety is ensuring that the guardian in closest daily contact with students is
    able to respond, and to do so promptly and without any cognitive or physical
    impairment.
    If schools are going to be able to handle emergencies that threaten children’s
    safety, teachers will need to be able to identify and respond to emergencies
    quickly, decisively, and with sound judgment. To take one example among the
    many dangers that will arise, we know for sure that kids get sick. A child’s illness
    may be benign or can be anything but benign. A child’s fever may quickly
    develop and spike -- it could be nonexistent in the morning and yet require medical
    attention before the end of the school day. A student may develop a life-or-death
    allergic reaction even more rapidly. The Centers for Disease Control and
    29
    Case: 17-12935      Date Filed: 12/20/2018     Page: 30 of 54
    Prevention reports that four to six percent of children in this country have food
    allergies, often to foods as ubiquitous as peanuts, and their reactions may be life-
    threatening if not addressed quickly. Food Allergies in Schools, Centers for
    Disease Control and Prevention, https://www.cdc.gov/healthyschools/
    foodallergies/index.htm (“Early and quick recognition and treatment can prevent
    serious health problems or death.”). There may be no time to waste in seeking
    help. Nor is there time to waste when a child falls into diabetic shock or suffers a
    seizure, fainting spell, or asthma attack.
    Teachers must also expeditiously recognize and respond to violent
    situations. The hard fact of life is that during school hours, bad things can happen
    to kids, and those front-line responders most directly supervising students -- our
    teachers and substitute teachers -- must be able to respond properly. It is not
    remote, idle, or fanciful to posit with some confidence that students, particularly
    teenagers, will engage in conflict at school. When students get into fights, a
    teacher will likely be in the best position to stop it, to diffuse it before it turns
    serious, or to seek help if the situation intensifies. Sadly, we need only look to
    recent events to know that teachers may, at a moment’s notice, become those most
    readily able to protect our students from deadly and immediate harm from outside
    the school as well. School shootings are a real and palpable possibility. They are
    not so remote as to be only a hypothetical: in the first half of this year alone, school
    30
    Case: 17-12935      Date Filed: 12/20/2018    Page: 31 of 54
    shooting incidents resulted in nearly three dozen deaths and numerous injuries.
    Denisa R. Superville & Evie Blad, A Deadly School Year: 35 People Killed in
    School Shootings, Education Week, May 28, 2018, https://www.edweek.org/ew/
    articles/2018/05/30/a-deadly-school-year-35-people-killed.html.
    As acute situations arise, and we know they will, the danger posed by
    leaving children, especially young children, in the care of an intoxicated teacher is
    profound. A teacher under the influence of drugs is significantly less likely to
    respond promptly, efficiently, and with sound judgment than a sober and
    clearheaded teacher. As we have said, it is not particularly likely that intoxicated
    teachers will regularly find themselves in front of a classroom. In some instances,
    if a teacher arrived at work high or drunk, a coworker might notice that something
    was wrong and would intervene -- but we will not require the School Board to
    count on this, just at the Supreme Court did not rely on railroad workers to report
    one another. Since the School Board considers this a danger to be guarded against,
    we will consider their proposed solution, rather than waving away the problem.
    The probability of harm is significant because it is a function not only of the
    relatively small chance of an intoxicated teacher in the classroom but also of the
    much larger chance that an emergency will occur. If a teacher who is responsible
    for the wellbeing and safety of a classroom of students is intoxicated on the job,
    there is a very realistic probability that a serious situation requiring a swift and
    31
    Case: 17-12935     Date Filed: 12/20/2018    Page: 32 of 54
    effective adult response would emerge. Thus, we consider the gravity of the harm
    that could befall a child -- not to mention that child’s family -- if the theoretically
    responsible adult fails to respond properly. See Knox Cty. Educ. Ass’n v. Knox
    Cty. Bd. of Educ., 
    158 F.3d 361
    , 373 (6th Cir. 1998) (considering “the magnitude
    of the harm that could result from the use of illicit drugs on the job” as an element
    of the government interest in suspicionless drug testing of teachers). Even though
    we accept a low probability of an impaired teacher leading a classroom, the result
    of our calculus is that teachers, including substitutes, who are drug-addicted pose a
    real danger to our schoolchildren.
    Friedenberg acknowledges the gravity of the risk, but she argues that the risk
    is purely hypothetical and speculative. We think she’s wrong about the
    probabilities of harm, but, in any event, profoundly mistaken when we also
    consider -- as we must -- the gravity of harm. We know with a high degree of
    confidence that serious problems will arise, that substitute teachers just like
    permanent teachers are the first and primary line of protection for minor students in
    the care of the public schools, and that an intoxicated guardian may well be unable
    to respond properly and promptly. See Chandler, 
    520 U.S. at 319
    .
    The danger that would be posed by drug-using individuals overseeing our
    classrooms is, we think, concrete and substantial. The government, therefore, has a
    significant safety-based interest in regulating the conduct of teachers to ensure
    32
    Case: 17-12935      Date Filed: 12/20/2018     Page: 33 of 54
    safety in the public schools. See Skinner, 
    489 U.S. at 620
     (finding, in the railroad
    context, a “[g]overnment[] interest in regulating . . . to ensure safety, like . . . its
    operation of a government office, school, or prison”) (quoting Griffin, 
    483 U.S. at
    873–74). While we fully accept that teachers are different from train drivers,
    Customs Officials, and law enforcement officials who carry firearms, we think the
    special need is similar in kind and at least as compelling. Teachers might not
    reliably face the life-and-death stakes that these other government employees will,
    but we cannot guarantee that schools will be as safe as we hope. In Von Raab, the
    Court found testing was justified because “a momentary lapse of attention can have
    disastrous consequences.” Von Raab, 489 U.S. at 670 (quoting Skinner, 
    489 U.S. at 628
    ). The same is true in a school environment. We don’t know that disastrous
    consequences would necessarily occur if a drug-using teacher were supervising a
    classroom, but the government has a powerful interest in not taking that chance.
    Common sense yields this conclusion. Running through relevant Supreme
    Court precedent is the idea that “special needs” may be observed because of an
    innate understanding of the problem presented. There was no evidence, empirical
    or otherwise, about an existing drug problem cited in Von Raab, yet the Supreme
    Court still said it was reasonable to test Customs Officials, whether they were
    involved in interdiction or carried firearms. See Von Raab, 
    489 U.S. at
    674–75.
    The need for testing was undergirded by an intuitive sense of the danger that drug-
    33
    Case: 17-12935     Date Filed: 12/20/2018    Page: 34 of 54
    using Customs Officials would pose, not by hard and demonstrable evidence. And
    again the Court highlighted that risk entailed both the likelihood that a serious
    harm will arise and the gravity of the harm. See 
    id.
     (noting that even though “all
    but a few of the employees tested are entirely innocent of wrongdoing,” the testing
    regime was valid, in part because “the possible harm against which the
    Government seeks to guard is substantial”)
    Although we rely heavily on the safety-sensitive Supreme Court precedents -
    - Von Raab and Skinner -- we also draw support for our conclusions from the cases
    addressing the drug-testing of students. These cases also establish that the
    government possesses far-reaching power in the unique setting of a school. The
    Fourth Amendment does not have equal force in the context of a school, owing to
    the strong government interest in maintaining order and creating an environment
    conducive to learning. See Vernonia, 
    515 U.S. at 656
     (“Fourth Amendment rights
    . . . are different in public schools than elsewhere . . . .”); T.L.O., 
    469 U.S. at
    338–
    40. These cases concerned the Fourth Amendment rights of students, who are
    compelled to attend school, not adults, but, to the extent that these cases are
    concerned with drugs in schools, as opposed to student drug use more specifically,
    the same disruption could result from teachers’ drug use. E.g., Vernonia, 
    515 U.S. at 662
     (“[T]he effects of a drug-infested school are visited not just upon the users,
    but upon the entire student body and faculty, as the educational process is
    34
    Case: 17-12935     Date Filed: 12/20/2018   Page: 35 of 54
    disrupted.”). As our Court has pointed out, the unique concerns present in public
    schools are longstanding, and the primary concern is with protection: “[S]chool
    safety undoubtedly has always been a chief concern of teachers and
    administrators.” Boim v. Fulton Cty. Sch. Dist., 
    494 F.3d 978
    , 984 (11th Cir.
    2007).
    Teachers are not students, over whom the state acts in loco parentis, see
    Vernonia, 
    515 U.S. at 655
    , but they are government employees. In Ortega, the
    Court said that “[t]he governmental interest justifying work-related intrusions [on
    privacy] by public employers is the efficient and proper operation of the
    workplace.” Ortega, 
    480 U.S. at 723
    . The search in Ortega was less invasive than
    a drug test, but something of the same principle carries over. The school is the
    teacher’s workplace, and the School Board’s interest in testing relates entirely to
    the “efficient and proper operation of the workplace,” not to a detached interest in
    the circulation of controlled substances. See 
    id. at 724
     (“In contrast to law
    enforcement officials, . . . public employers are not enforcers of the criminal law;
    instead, public employers have a direct and overriding interest in ensuring that the
    work of the agency is conducted in a proper and efficient manner.”).
    Reasoning along similar lines, the Sixth Circuit has addressed and upheld
    the suspicionless drug-testing of public school teachers. Knox Cty. Educ. Ass’n v.
    Knox Cty. Bd. of Educ., 
    158 F.3d 361
     (6th Cir. 1998). That court spoke in no
    35
    Case: 17-12935      Date Filed: 12/20/2018    Page: 36 of 54
    uncertain terms about the special needs presented in our schools. It too
    emphasized the compelling nature of the government interests involved, observing
    that it could “imagine few governmental interests more important to a community
    than that of insuring the safety and security of its children while they are entrusted
    to the care of teachers and administrators.” 
    Id.
     at 374–75. The Sixth Circuit
    looked at the unique responsibilities placed on our teachers as well -- to protect the
    students they serve, to respond with alacrity to the variety of problems as they
    arise, and to ensure an environment conducive to learning. 
    Id.
     Additionally, the
    Sixth Circuit noted that teachers acted as role models, and their actions readily
    affect the “perceptions, and thoughts and values” of students. 
    Id. at 375
    (“[T]eachers occupy a singularly critical and unique role in our society in that . . .
    they occupy a position of immense direct influence on a child, with the potential
    for both good and bad.”)
    As we see it, then, the suspicionless testing of substitute teacher applicants
    addresses many of the risks that we have outlined. For one, routine testing of
    provisionally hired substitute teachers provides a layer of protection to ensure that
    the guardians, the front line responders in direct control of the classrooms, are alert
    and capable. If applicants are using drugs during the job application process, we
    think it altogether reasonable for a school district to be suspicious of what could
    happen once they assume the job -- indeed, the school district would be seriously
    36
    Case: 17-12935      Date Filed: 12/20/2018    Page: 37 of 54
    remiss in placing children in the care of such individuals without at least being
    informed of the nature of their drug use. What’s more, it also seems to us that the
    school district may reasonably seek to impress upon its substitute teachers the
    importance of protecting the classroom environment and the school. We recognize
    that the policy only allows for testing once, on the front end of the job hiring
    process and before the substitute teacher may take up her place in front of a
    classroom. But this still has a salutary effect and is prophylactic, telling all
    prospective substitute teachers that drugs are not tolerated in the schools. Through
    this regime, the school district undeniably sends a powerful message and builds in
    an additional layer of deterrence.
    Moreover, the state has an independent interest in keeping drug users out of
    schools stemming from its “custodial and tutelary responsibility for children.”
    Vernonia, 
    515 U.S. at 656
    . Vernonia identifies the government’s role in schools as
    being “in loco parentis.” 
    Id. at 655
    . This simply means that the government is
    “acting as a temporary guardian or caretaker of a child, taking on all or some of the
    responsibilities of a parent.” In loco parentis, Black’s Law Dictionary (10th ed.
    2014). There is a “part of [this] parental authority” that means the power of
    “restraint or correction,” see Vernonia, 
    515 U.S. at 655
     (quoting 1 W. Blackstone,
    Commentaries on the Laws of England 441 (1769)), but, significantly, a parent’s
    power and responsibility is multi-faceted and comprises much more than just that.
    37
    Case: 17-12935      Date Filed: 12/20/2018    Page: 38 of 54
    Concurring in Earls, Justice Breyer explained that, in this role, schools
    “shoulder the burden of feeding students . . . offering before and after school child
    care services, and providing medical and psychological services.” Earls, 
    536 U.S. at 840
     (Breyer, J., concurring) (quotations omitted). More broadly, they “prepare
    pupils for citizenship in the Republic [and] inculcate the habits and manners of
    civility.” 
    Id.
     (quoting Bethel Sch. Dist. No. 403 v. Fraser, 
    478 U.S. 675
    , 681
    (1986) (alteration in original)). The in loco parentis status of school administrators
    does not give rise to a constitutional “duty to protect,” Vernonia, 
    515 U.S. at 655
    ,
    but it has a protective element nonetheless, especially insofar as that protection
    relates to influences that are seen as immoral, e.g., Fraser, 
    478 U.S. at 684
    (referencing “the obvious concern on the part of parents, and school authorities
    acting in loco parentis to protect children . . . from exposure to sexually explicit,
    indecent, or lewd speech”). Whether we view it as a matter of physical protection
    or a matter of value-inculcation, we think that schools have a meaningful interest
    in keeping active drug users -- including teachers -- away from their students.
    We recognize that there is a difference between a substitute teacher and a
    full-time classroom teacher. And, we note, the sufficiently compelling special
    need we recognize today is limited to the question before us: drug testing of
    provisionally hired substitute teachers. Substitute teachers, compared to full-time
    classroom teachers, may receive more regular supervision, which increases the
    38
    Case: 17-12935      Date Filed: 12/20/2018    Page: 39 of 54
    potential that some school official may recognize when something is wrong with
    the substitute teacher. But at the end of the day, there is no real distinction
    between the responsibilities assumed by substitute teachers and full-time classroom
    teachers except for the amount of time they spend in the classroom. Substitute
    teachers, just like regular teachers, are the first responders in the classroom, and
    serve as the primary (and frequently only) caretakers for young children under the
    government’s guardianship during the time they are at work. Their basic
    obligations are the same: to safeguard and teach those in their care.
    Today we are asked to consider only the testing of substitute teachers, but
    we do not think that by recognizing a special need in this unique setting we have
    opened the floodgates to indiscriminate suspicionless searches. We have always
    required, as we do today, an exceptional showing of a special need to allow a
    suspicionless search, and not all government jobs present the same needs. We
    have repeatedly observed that the “special needs” calculus requires a careful, case-
    by-case examination of whether the duties and responsibilities surrounding the job
    are compelling enough to justify the invasion of privacy. In every case, the court
    must weigh privacy interests against the government’s need. In some cases,
    depending on the job, a government employer might only have justification
    sufficient to support searching a workspace, as in Ortega. In other cases, as here, a
    more invasive search will be justified, possibly for similar safety reasons.
    39
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    Courts are well-positioned to make these determinations and draw these
    distinctions on a case-by-case, job-by-job, search-by-search basis. Indeed, in
    AFSCME v. Scott, 
    717 F.3d 851
     (11th Cir. 2013), when Florida’s Governor signed
    an executive order requiring periodic, random, suspicionless drug-testing of all
    eighty-five thousand state employees, we required the district court to make just
    this kind of specific examination -- to review categorized lists detailing every type
    of state job. We directed the district court to make specific findings by first
    examining the State’s purported need to test each employee in each category of
    job, and then to carry out the balancing test demanded by the Supreme Court for
    each category. Id. at 872. We said that this sort of “fact-intensive line-drawing” is
    precisely the role of courts. Id.; see also Bangert v. Hodel, 
    705 F. Supp. 643
    , 649
    (D.D.C. 1989) (“Obviously, the governmental interests at stake vary with
    particular positions, some of them implicating interests of various strengths in
    worker and public safety, workplace efficiency, and security.”).
    Our courts are quite capable of distinguishing between the needs presented
    in different factual settings. We think a court can reasonably draw the line
    between a substitute teacher and another employee, say a janitor who simply cleans
    a school building in the evening, whose responsibilities do not involve safety and
    security, relate far less directly to students, involve profoundly different risks, or
    implicate more persuasive countervailing concerns. But when we examine the
    40
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    responsibilities of substitute teachers, we see the compelling interests the Supreme
    Court has identified in the public schools -- the protection of children, the
    maintenance of a proper educational environment, and proactive efforts against
    student drug use including through good role modeling. These responsibilities are
    all uniquely vested in teachers, both substitute and permanent. And this is far from
    the broad testing regime rejected in Chandler. Here, the setting is unique, and the
    Supreme Court has recognized the uniqueness of the public school context. The
    state’s concern is not the general enforcement of its penal laws but a proactive,
    protective, and tutelary concern for students. See Chandler, 
    520 U.S. at 320
    (finding “no reason why ordinary law enforcement methods would not suffice to
    apprehend such addicted individuals”).
    Friedenberg objects, however, that the causal relationship is not direct
    enough between an intoxicated substitute teacher’s delayed reaction time in the
    case of an emergency and the possibility of harm to a child in the care of the state.
    But this wouldn’t be the first time that causation is multiple and complex. Front-
    line responders in this unique setting likely will be called on to solve the problem,
    navigate around a dangerous and unfolding event, break up a fight before it
    escalates, seek out emergency medical treatment, or provide direction and as much
    protection as possible if an unthinkable emergency occurs. Thus, we conclude that
    41
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    there is a powerful special need in this unique setting justifying the imposition of a
    suspicionless drug testing regime for substitute teacher applicants.
    V.
    Once a special need has been established, controlling precedent requires that
    we weigh the competing private and government interests implicated by the search.
    We must evaluate the reasonableness of the search by “balanc[ing] the individual’s
    privacy expectations against the Government’s interests to determine whether it is
    impractical to require a warrant or some level of individualized suspicion in the
    particular context.” Von Raab, 489 U.S. at 665–66. At the balancing stage, once
    the government has carried its burden of establishing the special need, the burden
    returns to the plaintiff to persuade the court that the balance weighs in its favor.
    See AFSCME, 717 F.3d at 880. The Supreme Court has laid out four factors to be
    used in conducting this balancing: the strength of the individuals’ expectation of
    privacy, measured in light of their chosen profession or special status; the nature
    and extent of the testing regime’s intrusion on privacy; the nature of the
    government’s special need; and the testing regime’s efficacy at achieving the
    government’s aims. A showing of an existing problem “would shore up an
    assertion of special need for a suspicionless general search program.” Chandler,
    
    520 U.S. at 319
    ; see also Earls, 
    536 U.S. at 835
    . But the government need not
    42
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    present empirical data concerning the extent of a drug problem peculiar to the
    group it seeks to test. See Earls, 
    536 U.S. at 835
    ; Von Raab, 
    489 U.S. at
    660–61.
    In making this calculus we are satisfied that the intrusion on privacy has
    been reasonably minimized by the School District and that the reasons offered for
    the search are compelling. Again, it comes down to the fact that schools are
    different. Reasonable expectations of privacy depend on circumstance, and the
    government is justified in demanding more from those to whom our country’s
    children are entrusted.
    A.
    The first factor we consider is the nature of the privacy interest at issue.
    Vernonia, 
    515 U.S. at 654
    . “In the case of searches conducted by a public
    employer, we must balance the invasion of the employees’ legitimate expectations
    of privacy against the government’s need for supervision, control, and the efficient
    operation of the workplace.” Ortega, 
    480 U.S. at
    719–20. The expectation of
    privacy is real and not insubstantial, but expectations will differ as context
    changes, and the public schools are unique. Individuals who choose careers
    working with children, particularly teachers in our public schools, enter a heavily
    regulated field with diminished privacy expectations. In fact, the Supreme Court
    has expressly recognized that “in an industry that is regulated pervasively to ensure
    safety” there are lessened expectations of privacy. Skinner, 
    489 U.S. at 627
    .
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    As the Court first explained in T.L.O. and reiterated in Vernonia and Earls,
    expectations of and interests in privacy are diminished by the unique context of
    schools. T.L.O., 
    469 U.S. at 340
     (“[T]he school setting requires some easing of the
    restrictions to which searches by public authorities are ordinarily subject.”);
    Vernonia, 
    515 U.S. at 656
     (“Fourth Amendment rights . . . are different in public
    schools than elsewhere . . . .”); see also Earls, 
    536 U.S. at
    830–32. These cases all
    addressed searches of students, not teachers, but the school environment is the
    same. Just as “the preservation of order and a proper educational environment
    requires close supervision of schoolchildren,” T.L.O., 
    469 U.S. at 339
    , the same
    needs require closer supervision of some adults than might be permitted in other
    areas of government employment not presenting the same safety concerns.
    The field of public education is pervasively regulated in order to protect the
    students and to promote learning. Thus, for example, teachers and substitutes may
    be required to undergo criminal background checks (as they are required to do in
    Palm Beach County), or to obtain professional certifications of their fitness to
    oversee a classroom. See, e.g., Knox Cty., 
    158 F.3d at 384
    . Florida also requires
    that all first-time substitute teachers complete additional training in “classroom
    management skills and instructional strategies.” 
    Fla. Stat. § 1012.35
    (b). And both
    the state and the School Board require fingerprinting of all new hires. 
    Id.
    § 1012.39(1)(a). Moreover, since they place their belongings in classrooms, open
    44
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    to numerous people throughout the day, teachers already have a diminished
    privacy interest in those belongings. Cf. Ortega, 
    480 U.S. at 722
     (holding that
    requiring a warrant for government employers’ work-related searches of
    employees’ workspaces “would seriously disrupt the routine conduct of business
    and would be unreasonable”). And substitute teachers, in particular, precisely on
    account of their temporary role, may expect that they will be subject to closer
    scrutiny.
    Bodily privacy is a different matter, but, where employees have safety-
    related reasons to inquire into their employees’ physical wellbeing, the Court has
    upheld intrusions on even this. The Court has “not suggest[ed] . . . that the interest
    in bodily security enjoyed by those employed in a regulated industry must always
    be considered minimal.” Skinner, 489 U.S. at 628. In Skinner, privacy interests
    were diminished because railroad regulation had in part focused on employee
    bodily fitness -- for example by requiring physical examinations for certain
    employees. Id. The Customs employees in Von Raab also had to “expect effective
    inquiry into their fitness and probity.” 489 U.S. at 672; see also Vernonia, 
    515 U.S. at 657
     (finding diminished expectations of bodily privacy for student athletes
    because they had to submit to physical exams). Here the School Board has
    provided a similarly safety-related reason for invading teachers’ bodily privacy -- it
    needs to know whether they use drugs before placing them in front of a classroom.
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    Teachers plainly step into a unique setting heavily regulated by the state on
    account of its profound social importance to the well-being of the nation. Given
    the unique role that teachers, including substitutes, play in this environment, we
    cannot say that they have the same privacy interests as adults in more typical
    contexts or even other government employees in similar contexts (i.e. janitors or
    some administrators). See AFSCME, 717 F.3d at 882 (suggesting that the
    balancing test must be conducted in a position-specific way). Thus, it does not go
    too far to say that teachers have a diminished privacy interest in this unique setting.
    B.
    “Having considered the scope of the legitimate expectation of privacy at
    issue here, we turn next to the character of the intrusion that is complained of.”
    Vernonia, 
    515 U.S. at 658
    . Again, a urine drug test implicates privacy interests.
    See, e.g., Skinner, 
    489 U.S. at 617
    . The privacy interests are different in character
    than the interests implicated by a search of one’s home, one’s person, or one’s
    personal belongings. Though urine drug testing requires those tested “to perform
    an excretory function traditionally shielded by great privacy,” the invasiveness of
    the test is reduced measurably when the procedures employed “endeavor to reduce
    the intrusiveness of the collection process.” 
    Id. at 626
    . The privacy invasion
    presented by urine collection may be minimal where, for example, the testing site
    46
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    emulates situations generally encountered in a public restroom. See Vernonia, 
    515 U.S. at 658
    .
    The testing regime employed by the Palm Beach School District is similar to
    those the Supreme Court has deemed “minimally intrusive.” Earls, 
    536 U.S. at 834
    . In Earls, urine collection took place in a private stall, with a monitor listening
    from the outside for abnormal sounds. 
    Id.
     at 832–33. Similarly here, collection
    could take place in a stall or protected area with a monitor listening from the
    outside for abnormal sounds in order to detect tampering. See Fla. Admin Code.
    R. 59A-24.005(3)(c)7; Earls, 
    536 U.S. at
    832–33. And in Earls, the results of the
    testing and any self-disclosed information about prescription medications were
    held confidentially, were only released on a “need-to-know” basis, and, perhaps
    most notably, were not released to law enforcement. See Earls, 
    536 U.S. at 833
    .
    Likewise, here the test results are not revealed to law enforcement, are maintained
    in confidential files only accessible by a few individuals, and are disclosed to the
    direct managers of the applicant only to reveal that the applicant did not pass a
    medical examination. In other words, the results are released in a limited way and
    only on a need-to-know basis. The Supreme Court has also approved policies that,
    like the regime here, check the urine sample for tampering. E.g. Vernonia, 
    515 U.S. at 650
    ; see also Earls, 
    536 U.S. at 832
    .
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    Case: 17-12935     Date Filed: 12/20/2018    Page: 48 of 54
    Only two minor components of the School District’s testing regime
    implicate intrusions beyond what the Supreme Court has deemed to be minimally
    intrusive. First, the School District’s policy allows for searches of a drug-tested
    individual’s wallet for evidence of tampering supplies, if the applicant chooses to
    keep the wallet on his person during the collection. Fla. Admin Code. R. 59A-
    24.005(3)(c)(5). This additional step appears to us to be narrowly pointed at
    preventing the use of tampering supplies, and a search of the wallet may be
    avoided by placing the wallet with the rest of one’s belongings outside the stall.
    Second, the disclosure of medications before testing, as is required by the testing
    regime, was a consideration that raised “some cause for concern.” Vernonia, 
    515 U.S. at 659
    . Still, where there was every indication that the information about the
    lawful use of medication would be kept confidential, as there is in this case, the
    pre-test disclosure was “not view[ed] . . . as a significant invasion of privacy.”
    Skinner, 
    489 U.S. at
    626 n.7.
    Overall, the drug-testing program employed by the School District is the
    type of intrusion the Supreme Court has found minimally invasive. The
    procedures for collection are fully consonant with those that have been approved in
    the past. In the face of these procedures, “the privacy interests compromised by
    the process of obtaining the urine sample are in our view negligible.” Vernonia,
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    Case: 17-12935     Date Filed: 12/20/2018   Page: 49 of 54
    
    515 U.S. at 658
    . We are, therefore, satisfied that the privacy invasion caused by
    the School District’s testing regime is a minimal one.
    C.
    Next we consider “the nature and immediacy of the governmental concern at
    issue here.” Vernonia, 
    515 U.S. at 660
    . As we have explained in detail, supra, we
    think the government has a compelling interest. The government’s essential
    interest in drug testing substitute teachers is to weed out applicants who abuse
    drugs in order to better achieve the basic safety and tutelary obligations of our
    schools. Again, teachers, including substitutes, are the School District’s front line
    agents. They serve as the guardians of school students throughout the school day.
    The drug testing regime functions prophylactically to help ensure that substitute
    teachers will not be impaired. Indeed, the very preventative nature of the search
    counsels in favor of its constitutional authorization: “The probable-cause
    standard . . . may be unsuited to determining the reasonableness of administrative
    searches where the ‘Government seeks to prevent the development of hazardous
    conditions.’” Earls, 
    536 U.S. at 828
     (quoting Von Raab 
    489 U.S. at 668
    ).
    As we have explained at some length, the safety of schoolchildren and the
    maintenance of an environment in which education could take place are
    compelling government interests. The Supreme Court’s previous student drug-
    testing cases confirm this. The unique concerns presented in public schools and
    49
    Case: 17-12935     Date Filed: 12/20/2018    Page: 50 of 54
    involving the custodial care of children “should not disappear from the analysis of
    special need simply because the drug testing is of a school employee rather than a
    student.” Again, we determine that the government interests implicated today are
    weighty. And the government’s interests also present sufficient immediacy. The
    Supreme Court itself has recognized as “an immediate crisis” the large-scale
    problem of drug addiction. Vernonia, 
    515 U.S. at
    662–63. But the empirical
    demonstration of a drug problem is not a necessary element to every suspicionless
    drug search. See 
    id.
    We conclude that the School District has presented a compelling need with
    sufficient immediacy. In T.L.O., Justice Blackmun wrote of the “special need for
    an immediate response to behavior that threatens either the safety of schoolchildren
    and teachers or the educational process itself.” T.L.O., 
    469 U.S. at 353
    (Blackmun, J., concurring in the judgment). This testing regime, we think,
    provides the kind of immediate -- that is, proximate -- response to the threat posed
    by drug-using teachers. The School District could reasonably conclude, as it
    obviously did, that testing at a later date, after a problem is uncovered and while a
    substitute is already standing in the front of a classroom, would not adequately
    protect schoolchildren.
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    D.
    Finally, we consider the efficacy of the School District’s testing regime.
    The mere fact that a drug test could conceivably be “beaten” by abstaining from
    drugs for a significant enough period of time does not necessarily render the test
    ineffective; Von Raab squarely rejected that argument. 489 U.S. at 676. Our
    inquiry is only into whether the testing regime is “an effective means of deterring”
    the undesirable behavior it targets. See Skinner, 
    489 U.S. at 629
    . We are not
    required to determine whether the current testing regime is the most effective
    possible means of keeping drug-using teachers out of the classroom. The Supreme
    Court has rejected that idea too, see, e.g., Vernonia, 
    515 U.S. at
    664 n.3, and it
    would be strange indeed to fault an effective drug-testing regime in this unique
    setting simply because the testing could be more frequent and more intrusive.
    Repetitive drug testing after hiring might be more efficacious, but we cannot
    demand that the School District design the single most effective regime. We are
    only required to find a “reasonably effective means of addressing the School
    District’s legitimate concerns.” Earls, 
    536 U.S. at 837
    . A more intrusive regime
    would also place greater burdens on the Fourth Amendment’s protections against
    invasions of privacy and would require a different application of the balancing test.
    Friedenberg relies on Chandler, where the Court struck down a testing
    regime for candidates for state office, in part because it was glaringly ineffective
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    and offered no realistic prospect of identifying any drug users over and above those
    who would likely be deterred already by the public scrutiny that comes with
    running for office. See Chandler, 
    520 U.S. at
    319–20. But Chandler is
    distinguishable. For one thing, the hazards described by the state were
    characterized by the Court as being “hypothetical,” not real or concrete. 
    Id. at 319
    .
    For another, the testing regime there allowed candidates to schedule their own tests
    and gave them a thirty-day window to do so. 
    Id.
     The defendant conceded that,
    with that much control, nearly all drug users would be able to abstain from drug
    use long enough to pass the test. 
    Id. at 320
    . The Palm Beach County School
    Board has made no comparable concession.
    Here, the applicants have less control over when they are tested. Applicants
    cannot control when their applications are reviewed or when they receive
    conditional job offers. They must then undergo testing before New Employee
    Orientation (NEO), which the district court found was “set for a date certain.” The
    record is not altogether clear on this point. Friedenberg said she received a
    conditional offer on February 21 and was scheduled for NEO on February 27,
    giving her less than a week to schedule her test. The School Board’s director of
    recruitment and retention said under oath at her deposition that teachers “typically”
    must go to the first possible NEO and that the School Board “like[s] to make sure
    52
    Case: 17-12935       Date Filed: 12/20/2018       Page: 53 of 54
    that they come” to that first possible date, as scheduled by the School Board.3
    However, she also said, in an earlier declaration, that the NEOs were available
    each week in March and April, and that Friedenberg could attend her NEO “on a
    later day or complete it online” if she passed a drug test or if the school board was
    prohibited from enforcing the policy by Court order. We see no clear error in the
    resolution of this apparent inconsistency and think that applicants here have
    substantially less ability to manipulate the test scheduling than the candidates in
    Chandler.
    Moreover, we can say with confidence that the second consideration drawn
    from Chandler, the role of public scrutiny in discouraging drug users from running
    for office, is not present here. Substitute teachers are not subject to the kind of
    intense public scrutiny -- “relentless scrutiny—by their peers, the public, and the
    press,” in the words of the Supreme Court -- that candidates for state office face.
    Chandler, 
    520 U.S. at 321
    . In fact, the district court found that even school
    3
    Her testimony was as follows:
    Q. When a substitute teacher is given a conditional job offer and they fulfill all
    the requirements that are remaining such as the drug test, then they need to
    go for a new orientation; right?
    A. Correct.
    Q. Do they typically need to go to the net new orientation?
    A. Yes.
    Q. Okay. They can’t just say, oh, well, you know, I’ll attend one in a few
    months?
    A. No. We like to make sure that they come. They’re scheduled is how we have
    it right now. [sic]
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    principals have only limited opportunities to observe substitute teachers. Since
    substitute teachers will be largely unobserved once they are hired, it seems to us
    that a drug test on the front end likely has far more deterrent value here than it did
    in Chandler.
    VI.
    The long and the short of it is that we are satisfied that the testing regime
    adopted by the Palm Beach County School Board serves a preventive and deterrent
    function. When we balance all the interests as we are required to do, the School
    Board clearly has carried the day. Friedenberg has a diminished privacy interest
    owing to the unique Fourth Amendment context of the public schools. Plainly, the
    School Board has made only a minimal intrusion on that privacy interest. It has
    done so in the service of a serious and compelling need. And the testing regime
    appears to us be reasonably effective and altogether reasonable. Friedenberg has
    not established a substantial likelihood of success on the merits. On this
    preliminary record, and on these facts, we can discern no abuse of discretion in the
    district court’s denial of a preliminary injunction.
    AFFIRMED.
    54