Bd. of Educ. of the Yorktown Cent. Sch. Dist. v. C.S. ( 2021 )


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  • 19-270
    Bd. of Educ. of the Yorktown Cent. Sch. Dist. v. C.S.
    In the
    United States Court of Appeals
    For the Second Circuit
    ______________
    August Term, 2019
    (Argued: December 5, 2019                   Decided: March 3, 2021)
    Docket No. 19-270
    ______________
    BOARD OF EDUCATION OF THE YORKTOWN CENTRAL SCHOOL DISTRICT,
    Plaintiff–Counter-Defendant–Appellant,
    –v.–
    C.S., INDIVIDUALLY AND ON BEHALF OF M.S., A MINOR,
    S.S., INDIVIDUALLY AND ON BEHALF OF M.S., A MINOR,
    Defendants–Counter-Claimants–Appellees.
    ______________
    B e f o r e:
    JACOBS, CARNEY, and PARK, Circuit Judges.
    ______________
    This Individuals with Disabilities Education Act (“IDEA” or the “Act”) case
    presents the question whether a school district can unilaterally amend an
    individualized education program (“IEP”) during the thirty-day “resolution period”
    that follows a parent’s filing of a due process complaint. See 
    20 U.S.C. §§ 1400
     et seq. The
    first IEP that the school district prepared for the child and presented to the parents
    indicated erroneously that the child would be placed in a 12-student classroom, which
    the parents deemed insufficient. But the parents had reason to believe that the school
    district would actually be providing a 15-student class (which they evidently deemed
    also insufficient); and they enrolled the child at a private school. That original IEP was
    deficient because it specified a class size that the district was never in fact going to
    provide. After the parents filed their due process complaint, the school district sought
    to cure this deficiency by unilaterally amending the original IEP to reflect that the
    student would be in a 15-student class. The district court found that the school district
    did not effectively amend the IEP, determined that the unamended IEP denied the child
    a FAPE because it promised what would not be done, and therefore ordered the school
    district to reimburse the parents for the private school tuition.
    We affirm, holding that the IDEA does not permit a school district to amend an
    IEP unilaterally during the thirty-day resolution period. The Act envisions the
    resolution period as a time for mediation and agreement, not one-sided action.
    AFFIRMED.
    ______________
    MARK CRAIG RUSHFIELD, Shaw, Perelson, May & Lambert,
    LLP, Poughkeepsie, NY, for Board of Education of the
    Yorktown Central School District.
    JASON STERNE (Kerry Margaret McGrath, Cuddy Law Firm,
    P.L.L.C., Valhalla, NY, on the brief), Sterne & Walsh,
    Rochester, NY, for C.S. and S.S.
    ANDREW A. FEINSTEIN, Esq., Mystic, CT (Ellen Saideman,
    Esq., Barrington, RI, on the brief), for Amicus Curiae
    Council of Parent Attorneys and Advocates, Inc.
    James Arden, Hilary R. Hoffman, and Graham L. Travaglini,
    Sidley Austin LLP, New York, NY, for Amici Curiae
    Mobilization for Justice, Inc., The Legal Aid Society,
    Advocates for Children of New York, Legal Services NYC,
    Brooklyn Defender Services, New York Legal Assistance
    Group, and New York Lawyers for the Public Interest.
    ______________
    2
    CARNEY, Circuit Judge:
    This Individuals with Disabilities Education Act (“IDEA” or the “Act”) case
    presents the question whether a school district can unilaterally amend an
    individualized education program (“IEP”) during the thirty-day “resolution period”
    that follows a parent’s filing of a due process complaint. The first IEP that the school
    district prepared for the child and presented to the parents indicated erroneously that
    the child would be placed in a 12-student classroom, which the parents deemed
    insufficient. But the parents had reason to believe that the school district would actually
    be providing a 15-student class (which they evidently deemed also insufficient); and
    they enrolled the child at a private school. That original IEP was deficient because it
    specified a class size that the district was never in fact going to provide. After the
    parents filed their due process complaint, the school district sought to cure this
    deficiency by unilaterally amending the original IEP to reflect that the student would be
    in a 15-student class. The district court found that the school district did not effectively
    amend the IEP, determined that the unamended IEP denied the child a free appropriate
    public education (“FAPE”) because it promised what would not be done, and therefore
    ordered the school district to reimburse the parents for the private school tuition.
    On appeal, the school district points to language in R.E. v. New York City
    Department of Education, 
    694 F.3d 167
     (2d Cir. 2012), in support of its position that the
    IDEA permitted it to amend the student’s IEP unilaterally during the thirty-day
    “resolution period” that follows a parent’s filing of a due process complaint that
    challenges a school’s IEP. But, as we discuss below, that language was not part of the
    holding of R.E. and did not definitively construe the IDEA. Looking at the text and
    structure of the IDEA, we conclude that the statute does not permit a school district to
    amend an IEP unilaterally during the thirty-day resolution period. The Act envisions
    the resolution period as a time for mediation and agreement, not one-sided action.
    3
    Adhering to the IDEA’s requirements for the resolution period is of particular
    importance in cases like this one, where parents withdraw their child from the public
    school and seek reimbursement for the costs of a different school, relying on the
    contents of a written IEP when making that decision.
    We affirm the district court’s judgment.
    BACKGROUND
    I.      The Individuals with Disabilities Education Act (the “IDEA”)
    Under the IDEA, 1 the federal government provides funding to states in support
    of special education programs and services for children with disabilities. See 
    20 U.S.C. § 1411
    . The availability of federal funding is conditioned upon a state’s submission to
    the Secretary of Education of a plan adequately ensuring that a FAPE “is available to all
    children with disabilities residing in the State.” 
    Id.
     § 1412(a)(1)(A). The Act requires
    participating states to identify all children with disabilities “who are in need of special
    education” and who reside within their borders; for each such child, they must develop
    an appropriate “individualized education program” (“IEP”). Id. § 1412(a)(3)-(4).
    The Department of Education has defined a “free appropriate public education”
    under the IDEA as an education provided at public expense, meeting state standards,
    and provided “in conformity with an [IEP].” 
    34 C.F.R. § 300.17
    . In New York state, IEPs
    are developed by “committees on special education” (“CSEs”) convened in each school
    1When first passed in 1975, the IDEA was entitled the Education for All Handicapped Children
    Act, Pub. L. No. 94-142, 
    89 Stat. 773
     (codified as amended at 
    20 U.S.C. §§ 1400-1482
    , 9567-9567b).
    In this Opinion, however, as in most contemporary case law, we refer to the statute as the
    Individuals with Disabilities Education Act, or IDEA, the name adopted in 1990, when Congress
    substantially amended the 1975 enactment. The IDEA was further amended in 2004 and
    reauthorized as the Individuals with Disabilities Education Improvement Act (“IDEIA”),
    Pub. L. No. 108-446, 
    118 Stat. 2647
    , but its common name has not changed.
    4
    district for each covered child. 2 
    N.Y. Educ. Law § 4402
    (1)(b)(1). Generally, a child’s CSE
    includes the child’s parents, some of the child’s teachers, a school district representative,
    and a school psychologist; it may also include another parent in the school district as
    well as other individuals with relevant specialized knowledge. 3 See id.; 
    N.Y. Comp. Codes R. & Regs. tit. 8, § 200.3
    (a)(1)(i)-(x).
    Under the IDEA, the process of developing an IEP is a collaborative one. The Act
    requires that parents be permitted to “examine all records relating to [their] child and to
    participate in meetings with respect to the identification, evaluation, and educational
    placement of the[ir] child.” 
    20 U.S.C. § 1415
    (b)(1). By regulation, a child’s CSE must
    consider the parents’ concerns regarding their child’s education as it formulates the IEP.
    
    34 C.F.R. § 300.324
    (a)(1)(ii). Further, among other required features, an IEP must set
    forth in writing the effects of the child’s disability on the child’s ability to learn and list
    any special services that the school district commits to providing the child to address
    those effects. See 
    id.
     § 300.320. It must set annual educational goals for the child and
    describe the child’s progress toward past goals. Id. Furthermore, and of particular
    2The IDEA’s procedural requirements apply generally to states’ “local educational agencies.”
    See, e.g., 
    20 U.S.C. § 1414
    (a)(2)(A) (“A local educational agency shall ensure that a reevaluation
    of each child with a disability is conducted in accordance with subsections (b) and (c) . . . .”).
    Because a school district is the relevant local educational agency in this case, we use “school
    district” when describing IDEA requirements; in other contexts, these obligations may apply to
    other local entities.
    3 In New York state, a school district often designates a core CSE composed of professional
    personnel active in the disability education field, and supplements that core in individual cases
    with the parent or parents of the child with special needs, and other individuals with particular
    knowledge relevant to the child. See 
    N.Y. Comp. Codes R. & Regs. tit. 8, § 200.3
    (a)(1)(ix)
    (requiring CSEs to include “other persons having knowledge or special expertise regarding the
    student, including related services personnel as appropriate, as the school district or the
    parent(s) shall designate,” with the “determination of knowledge or special expertise . . . made
    by the party (parents or school district) who invited the individual to be a member”).
    5
    concern here, the school district must keep a child’s IEP current through a process of
    annual review and revision. 
    20 U.S.C. § 1414
    (d)(4)(A).
    II.        Factual and Procedural History 4
    M.S., the student, was born in 2004. C.S. is her mother and S.S. is her father. She
    has been diagnosed with Tourette’s syndrome, attention deficit hyperactivity disorder
    (“ADHD”), developmental coordination disorder, and central auditory processing
    disorder. She is classified as learning disabled under the IDEA.
    M.S. attended public schools in the Yorktown Central School District
    (“Yorktown” or “the District”) in Yorktown Heights, New York, from kindergarten
    through fifth grade. When M.S. was in the second grade, a school psychologist
    recommended that she be evaluated by a CSE convened by the District. 5
    A.      Third Grade Through Sixth Grade
    A CSE first met to consider M.S.’s needs in May 2012, at the end of her second-
    grade year, and produced an IEP that took effect at the beginning of her third-grade
    year. According to C.S., in third and fourth grade M.S. received support from the
    District based on her IEP, but she “continued to struggle” academically and socially. Jt.
    App’x 395.
    During a meeting with the CSE in January 2015, in the middle of M.S.’s fifth-
    grade year, C.S. and S.S. reviewed M.S.’s recent test scores and became concerned about
    4We set forth the facts as presented in the district court opinion. They are generally undisputed;
    we note any exceptions.
    5In her second-grade year, M.S. took the Wechsler Individual Achievement Test – Third Edition
    (WIAT-III) and scored in the 14th percentile for reading and 4th percentile for mathematics.
    Those results were submitted to the CSE.
    6
    whether she was learning. 6 Acting on this concern, the parents had her independently
    evaluated by Dr. Nelson J. Dorta, a pediatric neuropsychologist. Dr. Dorta concluded
    that M.S. was “not progressing” academically. Jt. App’x 586. Based on M.S.’s “poor
    academic trajectories,” Dr. Dorta recommended that M.S.’s parents consider enrolling
    her in a school specially designed for children with language-based learning disabilities.
    Jt. App’x 587.
    At the end of her fifth-grade year, M.S.’s parents attended a CSE meeting to
    discuss her sixth-grade IEP. Her fifth-grade IEP had capped her class size at twelve
    students and provided that the class would be staffed with one teacher and one
    teaching aide—a formula known as a “12:1+1” class. At the CSE meeting, C.S. and S.S.
    pressed for changes to M.S.’s IEP, drawing on Dr. Dorta’s recommendations. As C.S.
    later recounted, however, Yorktown recommended for M.S.’s sixth grade year
    “essentially the same program that [M.S.] had had for fifth grade”: a 12:1+1 class. 7 Jt.
    App’x 399. In the parents’ estimation, the District did not sufficiently revise M.S.’s IEP
    in response to her recent history and circumstances.
    After discussion with Dr. Dorta, the parents decided to enroll M.S. in a sixth-
    grade class at Eagle Hill School (“Eagle Hill”), a private school that specializes in
    teaching students with learning disabilities. According to C.S., once M.S. started classes
    6In some instances, just C.S. (M.S.’s mother) participated in proceedings relevant here; in other
    cases, both C.S. and S.S. did. Because the differentiation has no substantive impact, for the sake
    of convenience we regularly refer to C.S. and S.S. either together or individually simply as “the
    parents.”
    7M.S.’s sixth-grade IEP provided for a 5:1 special reading class, which had not been part of
    M.S.’s fifth-grade IEP. For ease of reference, we will describe the relevant IEPs by the class size
    provided for most, though not all, academic subjects. Thus, we cite M.S.’s sixth-grade IEP as
    providing for a “12:1+1 class,” recognizing that M.S. would have been placed in a smaller class
    for reading under the terms of the IEP. Where relevant, we remind the reader of the precise
    terms of the IEP.
    7
    at Eagle Hill “the change in her was like night and day.” Jt. App’x 400. C.S. reported
    that M.S.’s reading, language, and social skills improved over the course of the year.
    Standardized tests administered in Fall 2015 and Spring 2016 provide support for the
    view that M.S.’s reading ability improved in that period.
    In December 2015, several months into M.S.’s sixth-grade year, C.S. filed a due
    process complaint against the District contending, among other things, that Yorktown’s
    IEP for M.S.’s sixth-grade year denied M.S. a FAPE. 8 See C.S. v. Yorktown Cent. Sch. Dist.,
    No. 16-cv-9950 (KMK), 
    2018 WL 1627262
    , at *4-5 (S.D.N.Y. Mar. 30, 2018). C.S.
    unsuccessfully sought reimbursement for the cost of sending M.S. to Eagle Hill for that
    year. 
    Id. at *5
    . In 2018, a district court affirmed the decision of a state review officer
    (“SRO”) denying reimbursement, both the SRO and the district court having
    determined that the District’s IEP for the 2015-16 year was sufficient. 
    Id. at *8, 27
    . The
    parents did not appeal that denial.
    B.     M.S.’s Seventh-Grade IEP
    On June 9, 2016, the District convened M.S.’s CSE to develop an IEP for her
    seventh-grade year, scheduled to begin in September 2016. C.S. attended this meeting,
    as did representatives of the District and teachers from Eagle Hill who were familiar
    with M.S. from her sixth-grade year.
    At the June 9 meeting, C.S. expressed concerns about the likely size of M.S.’s
    classes if she returned to Yorktown. As mentioned above, for her sixth-grade year, the
    District provided M.S. an IEP specifying a 12:1+1 class, but C.S. said that she feared that
    classes of that size in M.S.’s seventh-grade year would be too large and would inhibit
    8We discuss the IDEA’s rubric of a “due process complaint” below, in Part II.E. See also
    
    20 U.S.C. § 1415
    .
    8
    M.S.’s social and emotional development. (At Eagle Hill, her classes were substantially
    smaller.)
    The parties disagree about what exactly was communicated at the June 9
    meeting. According to the District, C.S. was told definitively that at Yorktown, M.S.
    would be placed in a 15:1+1 class. C.S. acknowledges that special education teacher
    Susan Sabella told her during the meeting that M.S. would be in a fifteen-student class
    “because”—as C.S. testified that Sabella explained to her—“when the students go to
    seventh grade the group size changes to a group of 15.” Jt. App’x 405. C.S. nonetheless
    avers that she left the meeting unsure from the whole of the conversation whether M.S.
    would be placed in a twelve-student class or a fifteen-student class if she were to attend
    middle school in the Yorktown School District.
    That day, after the meeting ended, C.S. emailed Michael Rosen, Yorktown’s
    Director of Pupil Personnel Services and Chairperson of M.S.’s CSE. She asked Rosen
    for permission to visit the Yorktown middle school that M.S. would attend, to observe
    classes there, and to speak with the seventh-grade teachers. About one week later,
    Rosen agreed to arrange a visit.
    Toward the end of June, C.S. visited the Yorktown middle school and met with
    teachers there. She spoke with the teachers about their qualifications, about how M.S.’s
    classes would be run, and about how M.S.’s time during the school day would be
    structured. C.S. recalled in particular that she asked the teachers if M.S.’s class in
    seventh grade would be 12:1+1 or 15:1+1, and that “[t]hey all said yes, it’s 15:1[+1].” Jt.
    App’x 416.
    C.     Ten-Day Notice and M.S.’s Enrollment at Eagle Hill
    Yorktown did not provide C.S. and S.S. with a written IEP for M.S.’s seventh-
    grade year at or immediately after the June CSE meeting, or after C.S.’s June visit to the
    9
    middle school. As of August 17, in fact, the parents had still neither received a copy nor
    been able to review a written statement of M.S.’s final IEP for the upcoming academic
    year. They gave Yorktown notice by letter of that date that they intended to enroll M.S.
    at Eagle Hill for her seventh-grade year.
    In their notice, they described their objections to what they understood
    Yorktown’s proposed IEP to be:
    The District failed to recommend a small class that utilizes research-
    based multisensory methods or provides the speech/language support
    [M.S.] needs. The District also failed to recommend a program to address
    [M.S.’s] social and emotional needs or a program that would be able to
    address [M.S.’s] math disability, dyscalculia. To date, we have not
    received a copy of the IEP and have not been able to review the final
    recommendations by the CSE. At this time, we disagree with the
    recommendations of the CSE. We do not believe that the IEP, program,
    or placement will provide the services and supports that [M.S.] requires
    to make educational progress. Absent an appropriate District program,
    we intend to send [M.S.] to Eagle Hill School . . . at public expense for the
    2016-2017 school year. We will be looking to the District for
    payment/reimbursement of all tuition costs and the cost of any and all
    related services including transportation costs.
    Jt. App’x 641-42. In their letter, the parents did not specify the class size that they
    understood Yorktown to offer; rather, they generally objected to Yorktown’s failure to
    “recommend a small class.” 
    Id. at 641
    . The record is not clear when Yorktown received
    the parents’ letter, but it appears to have been delivered not long after the August 17
    date that appears on its face.
    D.     The Process for Contesting an IEP Generally, and for M.S.
    In notifying Yorktown of their intention to enroll M.S. at Eagle Hill, C.S. and S.S.
    were taking the first step in the multi-layered scheme prescribed by the IDEA for
    parents desiring to contest that a school district has provided a FAPE for their child.
    10
    The details of that process lie at the core of this case and so we take a step back to
    review them.
    The IDEA empowers parents to bring a state administrative challenge—and,
    eventually, a challenge in state or federal court—to obtain an impartial evaluation of
    whether a school district’s proposed IEP provides or denies their child a FAPE. See
    
    20 U.S.C. § 1415
    . Instead of requiring that parents send their child for an extended
    period to a public school that offers a program the parents believe to be inadequate to
    their child’s needs, the IDEA further authorizes parents to enroll their child unilaterally
    in a private school and, in challenging their child’s proposed IEP, to seek
    reimbursement for tuition at the private school that in their view provides a suitable
    program. 
    20 U.S.C. §§ 1412
    (a)(10)(C)(ii). In this way, the Act seeks to reduce the chances
    that the child in need will effectively lose a school year while legal (and largely
    financial) rights and obligations are sorted out.
    If parents decide to make a private placement and intend to seek tuition
    reimbursement, the first step is generally for them to give the school district ten days’
    prior written notice of their intention and to include in that notice a statement of their
    concerns regarding the school district’s proposed IEP. The statute and regulations do
    not affirmatively require such notice or bar parents from enrolling their child in another
    school without such notice, but they establish a powerful incentive to give such notice
    by providing that reimbursement may be “reduced or denied” if parents fail to follow
    this procedure. See 
    20 U.S.C. § 1412
    (a)(10)(C)(iii)(I) (absent prior notice, reimbursement
    may be reduced or denied); 
    34 C.F.R. § 300.148
    (d) (same); see also Forest Grove Sch. Dist.
    v. T.A., 
    557 U.S. 230
    , 240-41 (2009) (discussing circumstances under which court may
    reduce or deny reimbursement under 
    20 U.S.C. § 1412
    ); M.C. ex rel. Mrs. C. v. Voluntown
    Bd. of Educ., 
    226 F.3d 60
    , 68 (2d Cir. 2000) (“[C]ourts have held uniformly that
    reimbursement is barred where parents unilaterally arrange for private educational
    11
    services without ever notifying the school board of their dissatisfaction with their
    child’s IEP.”). 9 The ten-days’ notice requirement makes it possible for the public school
    to reassess the IEP and cure any deficiency in it, thus minimizing the school’s expenses
    by allowing it to adjust its plans and provide the child with what the parents, at least,
    consider to be a FAPE. See M.C., 
    226 F.3d at 68
    ; also J.S. v. Scarsdale Union Free Sch. Dist.,
    
    826 F. Supp. 2d 635
    , 672 (S.D.N.Y. 2011).
    Even if parents give a school district timely notice of their intention to place their
    child in a private school, however, a court may reduce or deny reimbursement if the
    parents act unreasonably in their dealings with the school district—for example, by
    being uncooperative with its efforts to resolve their concerns during the ten-day notice
    period. 
    20 U.S.C. § 1412
    (a)(10)(C)(iii)(III); cf. Carmel Cent. Sch. Dist. v. V.P. ex rel. G.P., 
    373 F. Supp. 2d 402
    , 418 (S.D.N.Y. 2005) (denying reimbursement where parents “refused to
    cooperate with the local school district’s effort to devise a public school-based program
    for their child”). Claims for reimbursement are thus subject to statutory and judicially
    imposed constraints.
    Turning back to the specifics of the parents’ claim for reimbursement here: In
    their August 17, 2016 letter, the parents notified the District that they intended to enroll
    M.S. at Eagle Hill. Although the date of the District’s receipt of the letter is disputed, the
    parties agree that Yorktown did not contact the parents during the ten days thereafter
    to attempt to resolve the parents’ objections. On either August 30 or August 31, 2016,
    however, after the ten-day notice period expired, C.S. and S.S. received a written
    version of M.S.’s seventh-grade IEP. (Although this IEP purports to reflect discussions
    that occurred at the June CSE meeting, we will refer to it as the “August IEP” because it
    9Unless otherwise noted, in text quoted from caselaw, this Opinion omits all alterations,
    citations, footnotes, and internal quotation marks.
    12
    was not delivered in writing until August.) Neither party disputes that the August IEP
    advised the parents that M.S. would be placed in a 12:1+1 class, not a 15:1+1 class.
    C.S. recalled being “confused” upon receiving the written IEP: the District
    teachers had told her, she thought, that M.S.’s classes at Yorktown would necessarily be
    15:1+1, not 12:1+1, because of the typical size of seventh-grade classes at the middle
    school. Jt. App’x. 416-17. According to C.S., it was after she and S.S. received the August
    IEP informing them of a 12:1+1 plan that they definitively decided to place M.S. at Eagle
    Hill for her seventh-grade year. (Recall that their August 17 letter advised that “at this
    time, we disagree with the recommendations of the CSE” after pointing out that “[t]o
    date, we have not received a copy of the IEP and have not been able to review the final
    recommendations by the CSE.” Jt. App’x 641.)
    M.S. began school at Eagle Hill on September 6, 2016.
    E.      Due Process Complaint
    If parents and a school district cannot resolve the parents’ concerns during the
    ten-day notice period and the parents proceed to enroll their child in a private school,
    the parents may then seek reimbursement from the state by filing a “due process
    complaint” with a designated state administrative agency. 
    20 U.S.C. § 1415
    (b)(7)(A).
    The due process complaint must identify what the parents view as the IEP’s
    deficiencies. 
    Id.
     § 1415(b)(7)(A)(ii)(III).
    C.S. and S.S. submitted a due process complaint about M.S.’s seventh-grade IEP
    by letter dated September 26, 2016. In the complaint, they charged that Yorktown failed
    to provide M.S. with a FAPE for the 2016-17 school year, then just beginning. C.S. and
    S.S. highlighted a fundamental contradiction: “[S]chool personnel told the[m] . . . that
    seventh grade classes contain 15 students,” but the written IEP that the District
    provided “requires a 12:1+1 ratio.” Jt. App’x 515. The parents further contended that
    13
    Eagle Hill was an appropriate placement for M.S. and that they were entitled to
    reimbursement for the cost of sending M.S. to Eagle Hill for her seventh-grade year.
    F. Thirty-Day Resolution Period
    Once a due process complaint has been filed, a school district must arrange a
    meeting between the parents and the relevant members of the CSE to occur within
    fifteen days of the filing. 
    20 U.S.C. § 1415
    (f)(1)(B). This is called the “resolution session,”
    
    id.,
     or “[r]esolution meeting,” 
    34 C.F.R. § 300.510
    (a). The purpose of the resolution
    session is “for the parent of the child to discuss the due process complaint, and the facts
    that form the basis of the due process complaint, so that the [school district] has the
    opportunity to resolve the dispute that is the basis for the due process complaint.” 
    Id.
    In addition to requiring a timely resolution session, the statute gives the school
    district thirty days from the filing of the due process complaint to “resolve[] the
    complaint to the satisfaction of the parents.” 
    20 U.S.C. § 1415
    (f)(1)(B)(ii). This is called
    the “resolution period.” 
    34 C.F.R. § 300.510
    (b). If the parents and the school district
    resolve the complaint during the resolution session, they must execute a written
    settlement agreement, which either can then enforce in state or federal court. 
    20 U.S.C. § 1415
    (f)(1)(B)(iii); 
    N.Y. Educ. Law § 4404
    (1)(b). The school district and the parents may
    also agree to enter mediation instead of participating in the resolution session; they may
    also agree in writing to waive the resolution session requirement altogether. 
    20 U.S.C. § 1415
    (f)(1)(B)(i). If the parties resolve the dispute by mediation, they must sign a legally
    enforceable settlement agreement setting forth the terms of the resolution. 
    Id.
    § 1415(e)(2)(F). 10
    10If they are unable to resolve their differences during this period, they may proceed to the due
    process hearing stage, which we describe below in subsection G.
    14
    On October 7, 2016, C.S. and S.S. attended a resolution session with Rosen and
    another Yorktown representative. Regarding the District’s class-size recommendation,
    Rosen stated at the session that the written IEP sent to the parents at the end of August
    mistakenly showed a 12:1+1 class as its recommendation and should have listed a
    15:1+1 class size. The resolution session ended without a settlement.
    About two weeks later, by letter dated October 21, 2016, Yorktown provided the
    parents with a written response to their due process complaint. Addressing the
    proposed class size issue, Yorktown wrote:
    The District’s CSE recommended an appropriate size class for each of the
    student’s special education classes. The CSE also considered and
    appropriately rejected other class sizes. To the extent that the 2016-2017
    IEP misidentified the class sizes recommended for student, such mistake
    was corrected at the Resolution Session and the correct size of special
    education classes are [sic] identified on the IEP issued as a result of the
    Resolution Session.
    Jt. App’x 461.
    As of October 21, however, Yorktown had not sent the parents an “IEP issued as
    a result of the Resolution Session”; Yorktown did not send the parents a revised IEP
    until October 27, 2016 (the “October IEP”). The October IEP provided that M.S. would
    attend a 15:1+1 class for each of her academic subjects. 11 Yorktown concedes that it sent
    the revised IEP to the parents thirty-one days after the date of their due process
    complaint, Appellant’s Br. 8, and thus outside the thirty-day resolution period during
    which a school district is entitled to attempt to “resolve[] the complaint to the
    11Adding to the confusion, the October IEP—apparently because of an oversight—listed a class
    size of 12:1+1 on its second page, unchanged from the August IEP description. In contrast to the
    document’s first page, which specified 15:1+1 classes in academic areas, the second page read:
    “Based on the information presented the committee recommends a special, 12-1+1 for English,
    Social Studies, Science, and Math with related services as per the IEP.” Jt. App’x 441.
    15
    satisfaction of the parents.” 
    20 U.S.C. § 1415
    (f)(1)(B)(ii). Further contributing to the
    letter’s untimeliness, it was not delivered to the parents (they assert) until November 1,
    2016, the day that they finally signed a contract with Eagle Hill for M.S.’s seventh-grade
    year.
    G.    Due Process Hearing Before an Impartial Hearing Officer
    If objecting parents and a school district do not reach a settlement during the
    thirty-day resolution period, the next step is a “due process hearing.” 
    20 U.S.C. § 1415
    (f)(1)(B)(ii); see also 
    34 C.F.R. § 300.510
    (b)(1). In New York state, this hearing takes
    place before an “impartial hearing officer” (“IHO”) employed by the state. 
    N.Y. Educ. Law § 4404
    (1)(a); 
    N.Y. Comp. Codes R. & Regs. tit. 8, § 200.5
    . An IHO may find that a
    school district denied a child a FAPE based on the district’s procedural errors occurring
    in the development of the IEP, deficiencies in the substance of the IEP’s educational
    program, or both. See L.O. v. N.Y.C. Dep’t of Educ., 
    822 F.3d 95
    , 109 (2d Cir. 2016).
    On November 28, 2016, M.S.’s parents and representatives of the District
    attended a due process hearing presided over by IHO Carl L. Wanderman. From
    January through March 2017, the IHO conducted five additional hearings. During the
    proceedings, he heard testimony from the District’s Director of Pupil Personnel Services
    (Rosen), special education teacher Sabella, occupational therapist Susan Berman, special
    education teacher Dina Cahill, speech and language pathologist Elizabeth Mazzei, the
    parents’ educational expert (Dr. Dorta), and C.S.
    As documentary evidence, Yorktown introduced the October IEP, which
    Yorktown’s counsel referred to as the “corrected IEP.” 12 Jt. App’x 260. Because the due
    12Parties in due process hearings are broadly empowered to introduce relevant evidence,
    including documentary and testimonial evidence, subject only to limitations imposed by the
    16
    process complaint on which the parents were proceeding addressed the August IEP, the
    IHO permitted the parents to amend their complaint to address the October IEP as well.
    Their amended complaint asserted that Yorktown denied M.S. a FAPE for two main
    reasons: (1) the August IEP offered a 12:1+1 class, but Yorktown was incapable of
    implementing that configuration at the middle school; and (2) to the extent the October
    IEP was operative, a 15:1+1 class size was too large to provide M.S. a FAPE.
    The parents also maintained that Yorktown denied M.S. a FAPE because of
    certain procedural violations of the IDEA. When parents rely on procedural violations
    to establish a school district’s denial of a FAPE, they must “articulate how a procedural
    violation resulted in the IEP’s substantive inadequacy or affected the decision-making
    process.” M.W. ex rel. S.W. v. N.Y.C. Dep't of Educ., 
    725 F.3d 131
    , 139 (2d Cir. 2013).
    “Multiple procedural violations may cumulatively result in the denial of a FAPE even if
    the violations considered individually do not.” R.E., 694 F.3d at 190.
    The IHO issued his written decision in April 2017. He found that Yorktown
    made procedural errors in its interactions with C.S. and S.S. Significantly, he
    determined that the District erred procedurally in its August IEP by offering M.S. a
    12:1+1 class size that Yorktown “did not intend to implement.” Jt. App’x 237.
    Nonetheless, he concluded that this procedural violation—even when considered in
    combination with any errors that the District made by amending the IEP in late
    October—did not deny M.S. a FAPE. Id. at 241.
    He cited two factual findings in support of this conclusion. First, he found that
    C.S. “was aware that what was intended to be reflected in the IEP at the meeting of June
    9th was a class of 15:1+1.” Id. at 237. In other words, in the IHO’s view, C.S. understood
    IHO. See 
    N.Y. Comp. Codes R. & Regs. tit. 8, § 200.5
    (j)(3)(xii). Parties have the right to “compel
    the attendance of witnesses and to confront and question all witnesses at the hearing.” 
    Id.
    17
    the 12:1+1 shown in the August IEP to be a mistake, so any procedural problems
    encountered in correcting the error did not prevent the parents from knowing which
    class size Yorktown meant to recommend and did not prevent them from relying on that
    in their late August enrollment decision. But even had C.S. not been aware of the actual
    intended class size, the IHO reasoned, the evidence established that C.S. opposed a
    12:1+1 class size as well as a 15:1+1 size, finding them both too large. In light of this
    view, any procedural error committed by the District in its confusion of the 12:1+1 and
    15:1+1 class size did not affect the parents’ evaluation and rejection of the IEP or their
    decision-making process.
    Having ruled that M.S. was not denied a FAPE based on a procedural violation,
    the IHO turned to the substance of M.S.’s IEP, focusing on whether the October IEP,
    with its 15:1+1 class size, provided M.S. with a FAPE. He focused on the October IEP
    rather than the August IEP because (in his words) the IEP developed at the June 9, 2016
    meeting and transmitted at the end of August was “corrected at the Resolution
    session.” Jt. App’x 241. The IHO concluded that the 15:1+1 class and the other aspects of
    the October IEP provided M.S. a FAPE because they were “reasonably calculated to
    allow the child to learn and progress.” 
    Id.
    H.     Appeal to the State Review Officer
    C.S. and S.S. appealed, 13 and in 2017 the State Review Officer (“SRO”), Justyn P.
    Bates, reversed the IHO’s decision. Citing this Court’s decision in R.E. v. New York City
    13In New York, IHO decisions are appealed to a review officer in the State Education
    Department. 
    N.Y. Comp. Codes R. & Regs. tit. 8, § 200.5
    (k)(1); 
    N.Y. Educ. Law § 4404
    (2). The
    State Review Officer (“SRO”) conducts a de novo review of the IHO decision. See 
    34 C.F.R. § 300.514
    (b) (requiring that decisions on appeal be made based upon “the entire hearing record”
    as well as “additional evidence if necessary,” resulting in “an independent decision”);
    
    N.Y. Educ. Law § 4404
    (1)(d)(2) (“A state review officer of the education department shall
    review and may modify, in such cases and to the extent that the review officer deems necessary,
    18
    Department of Education, 
    694 F.3d 167
     (2d Cir. 2012), SRO Bates wrote, “The Second
    Circuit has described the resolution period as the timeframe within which the district
    has to remedy any deficiencies in a challenged IEP without penalty.” Jt. App’x 196.
    Although Yorktown “attempted to correct the June 2016 IEP during the resolution
    session,” he continued, “the evidence is far from clear that the district actually provided
    the corrected IEP to the parent within the resolution period.” 
    Id. at 197
    .
    In the SRO’s view, the statute gave Yorktown until October 26, 2016, to amend
    the IEP “without penalty” following the resolution session. 
    Id. at 196
    . The record
    evidence showed, however, that the District did not send an amended IEP to C.S. and
    S.S. until October 27, 2016—one day after the thirty-day resolution period expired—and
    it appears not to have been delivered to the parents until several days later. Because the
    October IEP was not timely delivered, the SRO concluded that he could not consider it
    in his analysis of whether Yorktown provided M.S. with a FAPE. Under R.E., the SRO
    explained, an IEP cannot be judged by something other than “its content at the close of
    the resolution period,” and a school district cannot “benefit[] from the use of
    retrospective evidence . . . that the student’s program would have been materially
    different than what was offered in the IEP.” Jt. App’x at 196 (citing R.E., 694 F.3d at 188).
    As a result, the SRO explained, Yorktown had to defend the August IEP and its
    proposed 12:1+1 class. Yorktown “offered no proof that a 12:1+1 special class was
    available,” the SRO wrote. Id. at 197. Accordingly, he was “constrained to find that the
    district was not able to implement the student’s program at the start of the 2016-17
    school year.” Id. It followed, then, that Yorktown failed to offer M.S. a FAPE. See id. And
    because the SRO also found that Eagle Hill was an appropriate placement for M.S. and
    in order to properly effectuate the purposes of this article, any determination of the impartial
    hearing officer relating to the determination of the nature of a child’s handicapping condition,
    selection of an appropriate special education program or service and the failure to provide such
    program and require such board to comply with the provisions of such modification.”).
    19
    that no equitable considerations weighed against awarding tuition reimbursement to
    the parents, he ordered Yorktown to reimburse C.S. and S.S. for M.S.’s Eagle Hill tuition
    for the 2016-17 school year.
    The SRO also made alternative findings. He observed that “there ha[ve] been
    virtually no state administrative or reported court cases applying R.E. that address . . .
    the outer boundaries of a district’s ability to modify an IEP using the resolution process
    in the manner described above”—that is, to modify the IEP unilaterally during the
    thirty-day resolution period. Jt. App’x 197. Thus, evaluating the particulars of the
    October IEP, including its 15:1+1 class size recommendation, and M.S.’s needs, the SRO
    concluded that if the October IEP were operative, it would have provided M.S. with a
    FAPE.
    I.        District Court Action
    The IDEA permits a dissatisfied party to challenge an SRO’s decision in state or
    federal court. 
    20 U.S.C. § 1415
    (i)(2)(A). Accordingly, in August 2017, Yorktown filed this
    action in the United States District Court for the Southern District of New York. In its
    complaint, Yorktown alleged:
    The SRO erred as a matter of law in concluding that R.E. v. New York City
    Dep’t of Educ., 
    694 F.3d 167
     (2d Cir. 2012), mandates that a corrected IEP
    that is issued to a learning disabled student’s parents 1 day after the
    expiration of the 30-day resolution period, especially where, as here, the
    defendant Parents were admittedly made fully aware of the error and
    correction during the resolution period, cannot be relied upon for
    determining whether the Student was provided a FAPE through the
    corrected IEP.
    Jt. App’x 19-20.
    The parties cross-moved for summary judgment. On January 23, 2019, Judge
    Briccetti granted summary judgment to C.S. and S.S. Like the SRO, the district court
    acknowledged that R.E. might “permit[] the District to unilaterally amend the IEP
    20
    during the resolution period,” but the court explained that even if that were the case,
    Yorktown had “failed to do so.” Jt. App’x 179. The district court reasoned that
    Yorktown’s “failure to send the Parents a copy of the modified IEP during the
    resolution period is fatal to its argument that it amended the IEP” because “New York
    regulations specifically require that a parent ‘receive a copy of the document that
    amends or modifies the IEP.’” 
    Id.
     (quoting 
    N.Y. Comp. Codes R. & Regs. tit. 8, § 200.4
    (g)(1)(iii)).
    The district court further concluded that Yorktown was precluded from
    maintaining—based on evidence that C.S. understood that Yorktown intended to
    recommend a 15:1+1 class in the August IEP—that the August IEP provided M.S. with a
    FAPE. Judge Briccetti found that the record left it “far from clear” that C.S. and S.S.
    understood Yorktown intended to recommend a 15:1+1 class size in the August IEP. Jt.
    App’x 180. Because the written August IEP recommended a class size of 12:1+1 that
    Yorktown was unable to provide, the district court concluded, C.S. and S.S. were
    entitled to reimbursement for the cost of sending M.S. to Eagle Hill for M.S.’s seventh-
    grade year.
    Yorktown timely appealed the district court’s judgment.
    DISCUSSION
    We review de novo a district court’s grant of summary judgment in an IDEA
    action. A.C. ex rel. M.C. v. Bd. of Educ. of the Chappaqua Cent. Sch. Dist., 
    553 F.3d 165
    , 171
    (2d Cir. 2009). In a district court proceeding under the IDEA, the parties and the court
    typically style the decision as a ruling on a motion for summary judgment, but “the
    procedure is in substance an appeal from an administrative determination, not a
    summary judgment motion.” M.H. v. N.Y.C. Dep't of Educ., 
    685 F.3d 217
    , 226 (2d Cir.
    2012). The district court therefore “engage[s] in an independent review of the
    21
    administrative record and make[s] a determination based on a preponderance of the
    evidence.” 
    Id. at 240
    .
    In conducting such an independent review, courts “must give due weight to [the
    state administrative] proceedings, mindful that the judiciary generally lacks the
    specialized knowledge and experience necessary to resolve persistent and difficult
    questions of educational policy.” 
    Id.
     Where an IHO and SRO reach conflicting
    conclusions, “a court must defer to the SRO’s decision on matters requiring educational
    expertise unless it concludes that the decision was inadequately reasoned, in which case
    a better-reasoned IHO opinion may be considered instead.” R.E., 694 F.3d at 189. On
    “issues of law,” however, “such as the proper interpretation of the federal statute and
    its requirements,” courts owe no deference to state hearing officers. Lillbask ex rel.
    Mauclaire v. State of Conn. Dep’t of Educ., 
    397 F.3d 77
    , 82 (2d Cir. 2005).
    The district court concluded that the August IEP offered a 12:1+1 class for M.S.
    and did not provide a FAPE for M.S. because Yorktown did not have a 12:1+1 class in
    which to place M.S. for her seventh-grade year. On appeal, Yorktown does not
    challenge that conclusion. Rather, Yorktown takes issue with the district court’s
    conclusion that Yorktown failed effectively to amend the August IEP as reflected in the
    October IEP. Because—Yorktown contends—the October IEP did recommend a FAPE to
    M.S. (as the SRO found), the parents are not entitled to reimbursement for tuition they
    paid to cover the 2016-17 academic year at Eagle Hill.
    Yorktown presents two essentially legal theories in support of its contention:
    first, it proposes that the October 6 resolution session should be deemed to have been a
    meeting of the CSE, albeit an incomplete one, and therefore the change in class size that
    was discussed there effectively amended the August IEP; second, citing R.E., 694 F.3d at
    188, it suggests that school districts may unilaterally amend an IEP during the thirty-
    day resolution period “without penalty,” and may rely on such an amended IEP in the
    22
    due process hearing that follows the resolution period. “Absent any legal prohibition on
    this Court relying on the amended/corrected IEP as the source for the provision of a
    FAPE to the student,” Yorktown urges, this Court should conclude, as did the IHO, that
    the October IEP was the operative IEP for purposes of the parents’ claim to tuition
    reimbursement, and that the parents’ claim should be denied because the October IEP
    provided M.S. a FAPE. Appellant’s Br. 41.
    Finally, as an equitable matter, Yorktown submits that even if it ran afoul of the
    IDEA’s procedural constraints by amending the IEP on the fly, the parents’
    reimbursement claim should be rejected because the District’s procedural violations did
    not prejudice the parents: according to Yorktown, C.S. and S.S. were in fact aware that
    Yorktown intended to recommend a 15:1+1 class size for M.S., and the parents intended
    to reject an IEP based on that class size regardless of the procedural posture of the
    putative amendment.
    These arguments assume that the IDEA allowed Yorktown unilaterally to amend
    M.S.’s IEP during the thirty-day resolution period and that C.S. and S.S. were not
    entitled to rely on the IEP as written when placing M.S. at Eagle Hill and filing a due
    process complaint. Indeed, the IHO, SRO, and district court’s statements seemed to
    reflect a willingness to assume the same insofar as they focused on the untimeliness of
    the school district’s post-resolution session amendment rather than the notion of
    unilateral amendment during the resolution period. 14 In at least superficial alignment
    14 See Jt. App’x 241 (IHO holding that “the IEP in issue, . . . as corrected at the Resolution session
    held on October 7, 2016, provided the child with FAPE”); Jt. App’x 211 (SRO explaining that
    “the district failed to offer the student a FAPE” because “the district failed to provide the parent
    with a revised IEP recommending the 15:1+1 special class . . . within the resolution period”);
    Jt. App’x 179 (district court explaining that “[t]he District’s failure to send the Parents a copy of
    the modified IEP during the resolution period is fatal to its argument that it amended the IEP”).
    The district court expressed some skepticism about Yorktown’s right to unilaterally amend an
    23
    with this understanding, our panel stated in R.E. that, once parents have filed a due
    process complaint and identified what they see as an IEP’s deficiencies, the resolution
    period provides school districts with “thirty days to remedy these deficiencies without
    penalty.” R.E., 694 F.3d at 188. We stated that the adequacy of the IEP is then “judged
    by its content at the close of the resolution period.” Id.
    In R.E., however, the school district made no unilateral amendment such as
    Yorktown presented the parents with here: rather (and as we explore further below),
    R.E. concerned a school district’s right to introduce evidence of what educational
    services a student would actually have been provided under a challenged IEP beyond
    what the written IEP stated. As M.S.’s parents correctly observe, and as R.E. did not
    address, “[n]othing in the IDEA or its regulations concerning the resolution process
    expressly provides school districts the right to unilaterally revise IEPs during the
    resolution period.” Appellees’ Br. 26. We now hold that, although the IDEA permits a
    school district to propose changes to an IEP during the resolution period, it does not
    permit a district to unilaterally amend an IEP during this period. Consistent with our
    prior interpretations of the statute, this holding ensures that parents who decide to
    reject a proffered public placement, place their child in a suitable private school, and
    seek reimbursement as part of their due process complaint can rely on the contents of
    their child’s written IEP when making the decision to do so. See Reyes ex rel. R.P. v.
    N.Y.C. Dep’t of Educ., 
    760 F.3d 211
    , 220 (2d Cir. 2014). To the extent that dicta in R.E.
    suggested otherwise, we now clarify the scope of the Court’s ruling in that case.
    IEP during the resolution period, but its analysis assumed arguendo that Yorktown had such a
    right. See Jt. App’x 179 (“Even if [R.E.] permits the District to unilaterally amend the IEP during
    the resolution period, the District failed to do so in any of the three ways described above.”).
    24
    I.        Our decision in R.E.
    Yorktown highlights language in R.E. to argue that it was entitled to unilaterally
    amend M.S.’s IEP during the resolution period, and that as a result, the October IEP
    controls the FAPE determination here. We reject this argument. Yorktown is correct that
    this Court stated in R.E. that an IEP may be amended during the resolution period. See
    694 F.3d at 188. Yorktown is wrong, however, that the R.E. Court held that a school
    district may do so unilaterally or that such an IEP as so amended becomes the basis for
    determining whether the school district offered the child a FAPE. Appellant’s Br. 31-32.
    A.      R.E.’s Holding
    R.E. addressed the authority of school districts to supplement an IEP with
    retrospective testimony about how the IEP would have been carried out, and the
    authority of courts to consider such testimony when adjudicating whether the IEP
    offered a FAPE. In R.E., the plaintiff parents filed due process complaints contending
    that IEPs provided for their children by the New York City Department of Education
    (“NYCDOE”) denied their children FAPEs. In defending the IEPs in each case at the
    administrative level, NYCDOE relied not just on the written IEP, but was also allowed
    to introduce evidence about the additional services that it would actually have
    provided under the IEP had the children attended NYCDOE schools. This evidence
    substantially supplemented the information provided in the children’s written IEPs.
    R.E., 694 F.3d at 185. We held that it was error to allow the NYCDOE to introduce such
    evidence after the fact, and error for the adjudicators to consider it in determining
    whether the IEPs denied these students a FAPE. We explained:
    [T]estimony regarding state-offered services may only explain or justify
    what is listed in the written IEP. Testimony may not support a
    modification that is materially different from the IEP, and thus a
    deficient IEP may not be effectively rehabilitated or amended after the
    fact through testimony regarding services that do not appear in the IEP.
    25
    Id.
    The R.E. court recognized parents’ “considerable reliance interests” when they
    choose to enroll their child in a private school and to seek reimbursement for tuition on
    the premise that the proposed IEP is inadequate. Id. at 186. Parents must decide
    whether to place their child in a private school based on the services outlined in the IEP,
    we reasoned, and not based on whatever services school authorities later testify the
    district would actually have provided. To this end, the R.E. Court did not preclude
    school districts from relying on testimony that further “explain[ed]” the services listed
    in an IEP. Id. at 185. It held, rather, that school districts may not attempt to
    “rehabilitate[] or amend[]” an IEP’s listed services through such post hoc testimony as
    was presented in R.E. Id.
    R.E. thus established an important procedural protection for parents challenging
    their child’s IEP: parents may rely on the text of the IEP as it stands when they decide to
    place their child in a private school. In so holding, we sought to eliminate the risk that
    parents would be denied reimbursement for reasons not apparent from the IEP:
    sandbagging the parents, in effect, because the child would have received particular
    services not specified in the IEP and likely unknown to the parents. In the panel’s
    words: “In determining the adequacy of an IEP, both parties are limited to discussing
    the placement and services specified in the written plan and therefore reasonably
    known to the parties at the time of the placement decision.” Id. at 187.
    B.     R.E.’s Dictum
    After explaining this rule, the R.E. court addressed the concern advanced by the
    school district there that the rule would enable opportunistic parents “to take advantage
    of a school district by failing to alert it to IEP deficiencies and subsequently recover
    tuition based on those deficiencies.” Id. at 188. The fear was that, if a hearing officer was
    26
    constrained to consider the text of the errant IEP alone, parents could seize upon
    innocent errors in an IEP, fail to notify the school district of those errors, and then win
    reimbursement and harm the district financially—despite having made the placement
    choice that they would have made without regard to the district’s proffered IEP.
    Without the ability to illustrate what services would in practice have been provided, the
    school district would be unfairly stuck defending the plain text of the IEP, errors and
    all, when in fact a satisfactory IEP was within its reach.
    The R.E. Court identified the thirty-day resolution period as offering the answer
    to this concern. First, the Court noted that parents filing a due process complaint must
    list all the deficiencies they identify in their child’s IEP. Id. at 187; see also 
    20 U.S.C. § 1415
    (b)(7)(A)(ii)(III). Then, after receiving the comprehensive list, the school district
    “has thirty days to remedy these deficiencies without penalty,” the R.E. Court stated.
    694 F.3d at 187-88. The Court commented further, in language we now question:
    If, at the end of the resolution period, the parents feel their concerns have
    not been adequately addressed and the amended IEP still fails to provide
    a FAPE, they can continue with the due process proceeding and seek
    reimbursement. The adequacy of the IEP will then be judged by its
    content at the close of the resolution period.
    R.E., 694 F.3d at 188. By giving the school district a chance to correct or revise the IEP,
    the Court reasoned, the resolution period prevented parents from taking advantage of
    innocent errors in an IEP’s text. Id.
    This description of what occurs during the IDEA resolution period might be read
    to imply that the school district is entitled to make unilateral amendments to the IEP
    during the course of the resolution period. To draw such an implication would be
    incorrect. But, further, the contested language was not necessary to the Court’s decision,
    27
    because in the cases at bar, no such substantive amendments had occurred. See id. at
    176-77, 179-80, 182-83. 15
    Because the language relied on by Yorktown addressed only a potential objection
    to the rule the Court adopted and did not address a situation presented to the court, we
    think the Court’s discussion of amendment during the resolution period was non-
    binding dictum. See United States v. Rubin, 
    609 F.2d 51
    , 69 n.2 (2d Cir. 1979) (Friendly, J.,
    concurring) (“A judge’s power to bind is limited to the issue that is before him.”), aff’d,
    
    449 U.S. 424
     (1981). Of course, “[w]e do not suggest that we may ignore” the language
    in R.E.: even non-binding statements from prior panels of this Court “deserve close
    consideration.” Jimenez v. Walker, 
    458 F.3d 130
    , 142 (2d Cir. 2006). But, as explained
    below, when subject to closer scrutiny in light of the factual record presented here, we
    see that the text and structure of the IDEA necessarily foreclose the school district’s
    unilateral substantive amendment of an IEP during the thirty-day resolution period.
    Rather, the resolution period is designed to foster a mutual process, in line with the
    cooperative CSE that is the hallmark of the IEP development process, as we described
    above.
    II.        The Text and Structure of the IDEA
    A.      Text
    First, the text of the IDEA provides procedures by which a school district and
    parents can agree to amend an IEP during the resolution period; it gives no evidence of a
    Congressional intent to grant school districts the right to amend an IEP unilaterally
    during the resolution period or, indeed, at any time. The IDEA provides that parents
    15We note that the Court referred specifically only to a school district’s ability to “cure” the
    “inadvertent or . . . good faith omi[ssion] of a required service from the IEP.” R.E., 694 F.3d at
    188.
    28
    and a school district may convene a resolution session; may agree to mediate the
    dispute; or may otherwise agree in writing to waive holding a resolution session.
    
    20 U.S.C. § 1415
    (f)(1)(B). If the parents and school district reach an agreement during
    the resolution session or mediation, they must sign a legally enforceable settlement
    agreement setting forth the terms of the resolution. 
    Id.
     § 1415(e)(2)(F), (f)(1)(B)(iii)-(iv).
    Nowhere does the statute provide that school districts may act without the parents’
    agreement to amend the IEP during the resolution period, much less rely on a new IEP
    in the due process hearing to argue that the student was provided a FAPE. The statute’s
    emphasis on agreement, its detailed prescription of procedures for reaching agreement,
    and its concurrent silence on unilateral action are difficult to square with the notion that
    the IDEA permits the school district to act unilaterally during the resolution period. 16
    In fact, the statute contains multiple indications that any change made to the IEP
    during the resolution period must be agreed to by both the parents and the school
    district. For instance, either party may void a settlement agreement reached at a
    resolution session within three days of the agreement’s execution. Id. § 1415(f)(1)(B)(iv).
    Also, the statute provides that the school district personnel may not be accompanied by
    counsel at the resolution session unless the parents are as well. Id. § 1415(f)(1)(B)(i)(III).
    The IDEA thus presents the resolution period as an interlude during which school
    district representatives may talk with the parents, and possibly satisfy the parents’
    concerns, all the while going to great lengths to protect parents’ rights and their
    16The IDEA does describe the resolution session as providing the school district with “the
    opportunity to resolve the complaint.” 
    20 U.S.C. § 1415
    (f)(1)(B)(i)(IV). We read this phrase,
    however, simply as a general description of the resolution session’s multilateral purpose.
    Although the School District points to § 1415(f)(1)(B) in its briefing, it admits that “nothing in
    the resolution session provisions at 
    20 U.S.C. § 1415
    (f)(1)(B) provides for any formal IEP
    amendment notice or process either during the resolution session period or when the act of
    ‘amendment’ . . . is deemed to have occurred.” Appellant’s Br. 33.
    29
    authority to proceed to a due process hearing if they so choose. The statute’s insistence
    on communication and its careful articulation of procedural protections for parents
    stand at odds with a rule that would allow school districts to unilaterally amend their
    IEPs during the resolution period and affect the FAPE determination on which a child’s
    schooling options rest.
    The IDEA also directly addresses how parties may amend an IEP. It sets out
    detailed procedures for amendment that nowhere allude to, never mind identify, a right
    for school districts to unilaterally amend an IEP during the resolution period. For
    example, a provision entitled “Amendments” provides, “Changes to the IEP may be
    made either by the entire IEP Team or, as provided in subparagraph (D), by amending
    the IEP rather than by redrafting the entire IEP.” 
    Id.
     § 1414(d)(3)(F). Subparagraph D, set
    out in the margin, does not mention resolution periods. 17 That these amendment
    procedures do not discuss unilateral amendment during the resolution period further
    supports the conclusion that Congress did not intend to allow what the school district
    here urges. See K.A. ex rel. F.A. v. Fulton County Sch. Dist., 
    741 F.3d 1195
    , 1207-08
    (11th Cir. 2013) (“In light of the IDEA’s lengthy and excruciatingly detailed procedural
    protections, we decline to read into the statute a significant procedural requirement that
    Congress did not express.”); see also M.C. ex rel. M.N. v. Antelope Valley Union High Sch.
    17   Subparagraph D provides:
    In making changes to a child’s IEP after the annual IEP meeting for a school
    year, the parent of a child with a disability and the local educational agency
    may agree not to convene an IEP meeting for the purposes of making such
    changes, and instead may develop a written document to amend or modify the
    child’s current IEP.
    
    20 U.S.C. § 1414
    (d)(3)(D).
    30
    Dist., 
    858 F.3d 1189
    , 1197 (9th Cir. 2017) (“An IEP, like a contract, may not be changed
    unilaterally.”).
    Finally, the IDEA’s description of due process hearings conflicts with the notion
    of a school district’s unilateral right to make IEP amendments during the resolution
    period. The Act provides that a court or hearing officer may order a school district to
    reimburse parents for the cost of unilaterally enrolling their child in a private school
    “if the court or hearing officer finds that the agency had not made a free appropriate
    public education available to the child in a timely manner prior to that enrollment.”
    
    20 U.S.C. § 1412
    (a)(10)(C)(ii) (emphasis added). The statute thus contemplates a due
    process hearing that examines whether the IEP provided the child with a FAPE before
    the parents’ enrollment of their child in a private school—and that does not examine the
    IEP as amended following the parents’ due process complaint.
    Given just the absence of textual support for a school district’s right to
    unilaterally amend an IEP during the resolution period, and the tension between that
    right and the text of other IDEA provisions, we would decline to read such a substantial
    provision into the statute. Yet, as explained below, this putative right also makes little
    sense when considered in the context of the broader statute.
    B.     Structure
    The IDEA directs parents to provide the school district with written notice ten
    days in advance of placing their child in a private school, and to include in this notice a
    statement of their “concerns” regarding the proffered IEP. 
    20 U.S.C. § 1412
    (a)(10)(C)(iii);
    see also 
    34 C.F.R. § 300.148
    (d) (same). If parents do not provide the requisite notice, any
    reimbursement they later seek by filing a due process complaint may be “reduced or
    denied,” 
    id.,
     as we discussed above, see Part II.D, supra. This provides parents a
    powerful incentive to comply. See M.C., 
    226 F.3d at 68
    .
    31
    The ten-day notice requirement gives school districts an opportunity to discuss
    with parents their objections to the IEP and to offer changes to the IEP designed to
    address those objections—all before the parents enroll their child in a private school and
    file a due process complaint. See J.S., 
    826 F. Supp. 2d at 672
     (“[T]he purpose of the notice
    requirement is to give the district a meaningful opportunity to minimize its expenses by
    developing its own IEP that would provide the child with a FAPE within the School
    District.”). This does not mean that a school district may unilaterally amend an IEP
    during the ten-day notice period; but, if parents unreasonably reject the school district’s
    proposed changes to the IEP, or are otherwise uncooperative, courts and hearing
    officers are fully empowered to deny them reimbursement. See 
    20 U.S.C. § 1412
    (a)(10)(C)(iii)(III) (providing that reimbursement may be reduced or denied
    “upon a judicial finding of unreasonableness with respect to actions taken by the
    parents”).
    School districts thus may seek to correct the IEP during the ten-day notice
    period, in which they have knowledge of the parents’ objections. They may defend
    against a claim for tuition reimbursement by pointing out that parents did not
    cooperate in the revision of the IEP, or that the corrected IEP, if accepted by the parents,
    would have provided the child with a FAPE. See, e.g., Ashland Sch. Dist. v. Parents of
    Student E.H., 
    583 F. Supp. 2d 1220
    , 1228 (D. Or. 2008) (denying reimbursement despite
    parents’ participation in IEP meeting following notice of withdrawal based in part on
    finding that, at time of meeting, “[p]arents were not about to transfer [their child] back
    to the public school system”), aff’d, 
    587 F.3d 1175
     (9th Cir. 2009). 18 The ten-day notice
    18Cf. P.K. ex rel. S.K. v. N.Y.C. Dep't of Educ. (Region 4), 
    819 F. Supp. 2d 90
    , 117-18 (E.D.N.Y. 2011)
    (declining to deny or reduce reimbursement where parents noted “they were willing to meet
    with the Department to try to resolve the matter” and parent’s testimony about basis for
    refusing school district’s proposed placement was “credible”), aff'd, 526 F. App’x 135 (2d Cir.
    2013); Wood v. Kingston City Sch. Dist., No. 08-cv-1371 (NAM) (RFT), 
    2010 WL 3907829
    , at *9
    32
    period thus provides to the school district the very protection that the R.E. Court
    described as being offered by the resolution period: it can prevent opportunistic parents
    from “tak[ing] advantage of a school district by failing to alert it to IEP deficiencies and
    subsequently recover[ing] tuition based on those deficiencies” because any such
    deficiencies must be identified in the parents’ ten-day notice letter and can be discussed
    and addressed before the parents decide to reject the IEP and to place their child in a
    private school that will offer the instruction they seek. 694 F.3d at 188.
    For this reason, Yorktown’s insistence that barring the School District’s unilateral
    amendment during the resolution period will permit parents to engage in “‘gotcha’
    tactic[s]” is misplaced. Appellant’s Br. 35. Yorktown could have met with C.S. and S.S.
    and addressed their concerns during the ten-day notice period. Although it had not yet
    sent a written IEP to C.S. and S.S., Yorktown could have brought the August IEP to the
    meeting. Had it done so, it would have been apparent to all that the IEP showed a
    12:1+1 class size recommendation, and Yorktown could have corrected the error,
    making clear that the IEP was supposed to provide for a 15:1+1 class, and it could have
    offered to change the IEP to reflect that fact and provide clarity to the parents regarding
    their options. It was no substitute to clarify the mistake during the resolution session,
    given that C.S. and S.S. had already placed M.S. at Eagle Hill at that point.
    It is true that, during the ten-day notice period, Yorktown could not have
    unilaterally amended the IEP, and that C.S. and S.S. could still have proceeded to file a
    due process complaint contending that they withdrew their child based on an IEP that
    recommended a 12:1+1 class that the school district was unable to provide. Yet in this
    circumstance the record would show that an error had been made and that the parents
    (N.D.N.Y. Sept. 29, 2010) (declining to deny parents reimbursement based on
    “uncooperativeness” after parents did not respond to school district’s invitation to meet and
    discuss parents’ concerns during ten-day notice period).
    33
    had been fully apprised of the error. A court or hearing officer would be fully
    empowered to consider the fact that C.S. and S.S. were made aware that Yorktown
    intended to offer a 15:1+1 class for M.S. before the parents chose to enroll M.S. in a
    private school. In that event, the court or hearing officer could reduce or deny C.S. and
    S.S.’s reimbursement accordingly. 19
    This Court’s previous rulings barring the use of retrospective testimony to alter
    an IEP have been aimed, consistent with the IDEA’s language and purpose, “to ensure
    that parents can make placement decisions for their children based solely on the
    information made available to them by the [school district] at the time of the placement
    decision.” Reyes, 760 F.3d at 220. Preventing schools from retroactively amending IEPs
    during the resolution period serves this same end.
    To hold otherwise would introduce a measure of absurdity into the IDEA
    process. As a default rule, parents must bring a due process complaint under the IDEA
    within two years of the date that they knew or should have known about the school
    district’s conduct that forms the basis of the complaint. 
    20 U.S.C. § 1415
    (f)(3)(C). New
    York observes this two-year statute of limitations. 
    N.Y. Educ. Law § 4404
    (1)(a). Thus,
    parents who believe that their child’s school district is not providing a FAPE because of
    a deficient IEP may (1) give ten days’ notice of their plan to move their child out of the
    school district, (2) enroll their child in a suitable private school, and (3) opt not to file
    their due process complaint until well over a year later, long after their child has
    completed the contested year at the private school. Under the rule that Yorktown
    19This approach avoids perverse incentives. As amici note, if unilateral amendment during
    resolution periods were permitted, school districts would have an incentive to offer lower cost
    IEPs and then amend them to provide more services only if and when parents filed a due
    process complaint. See Amicus Br. of Mobilization for Justice, Inc. et al. at 24 (“Districts could
    create an IEP with limited, low-cost services, and then wait and see if the parents file a due
    process complaint.”).
    34
    advocates, the school district could then unilaterally amend the IEP during the
    resolution period, post-due process complaint, to offer a more generous or suitable
    program. And yet the school district could argue based on the amended IEP that it
    provided the child with a FAPE, despite the fact that the IEP did not exist during the
    child’s school year. This would give IDEA procedures a life of their own, wholly
    divorced from their intended meaning and of little use to parents, courts, and school
    districts alike.
    C.S. and S.S. were entitled to rely on the August IEP as written when they
    decided to place M.S. at Eagle Hill at the end of August, before the school year started.
    It was the only IEP that they had received at that time. The Court in R.E. recognized
    that “[i]n order for this system to function properly, parents must have sufficient
    information about the IEP to make an informed decision as to its adequacy prior to
    making a placement decision.” 694 F.3d at 186. To make good on this promise, school
    districts cannot be permitted to unilaterally amend IEPs during the resolution period.
    For reasons outlined above, we reject Yorktown’s other arguments as well. To
    accept Yorktown’s contention, made only in passing, that the resolution session itself
    constituted an (incomplete) meeting of M.S.’s CSE and that it could make unilateral
    changes to her IEP on that basis, would undermine the parents’ right to rely on the IEP
    as-written at the time they decided to place M.S. in a different school and to file a
    reimbursement action. Similarly, to accept Yorktown’s argument that reimbursement
    should be denied here because the parents were aware that Yorktown intended to
    include a 15:1+1 class size in the August IEP would undermine the parents’ ability to
    rely on the representations in the written IEP—regardless of what they expected the
    writing to provide before they received it. We emphasize that the main source of
    confusion here was Yorktown’s repeated failures to provide the parents with an
    accurate and timely IEP. See supra at 8-10, 12-15. The statute does not permit Yorktown
    35
    to unilaterally “correct” its substantive errors well after the time for such action has
    passed.
    CONCLUSION
    The IDEA does not provide school districts the right to unilaterally amend IEPs
    during the resolution period. Because Yorktown argues only that it provided M.S. a
    FAPE based on her IEP as unilaterally amended during the resolution period, and does
    not dispute that the unamended IEP denied M.S. a FAPE, we conclude that Yorktown
    denied M.S. a FAPE for her 2016-17 school year. The district court’s other conclusions
    relevant to the reimbursement order—those about the suitability of the Eagle Hill
    placement and the equitability of the parents’ conduct—are not challenged on appeal
    and therefore stand unaltered.
    Accordingly, the judgment of the district court is AFFIRMED.
    36