Full opinion text
BACKGROUND SACK, Circuit Judge: Both of these appeals, which we heard in tandem, concern the proper interpretation of the Individuals with Disabilities Education Act (“IDEA”), 20 U.S.C. § 1400 et seq. They each involve unique facts which must therefore be set out in considerable detail in order to address the legal issues they raise. The cases both require us to address the manner in which the federal courts must go about their IDEA-mandated review of state administrative decisions. The IDEA Congress enacted the IDEA “to ensure that all children with disabilities have available to them a free appropriate public education ... designed to meet their unique needs ... [and] to ensure that the rights of children with disabilities and parents of such children are protected.” 20 U.S.C. § 1400(d)(1)(A)-(B); see also Forest Grove Sch. Dist. v. T.A., 557 U.S. 230, 247, 129 S.Ct. 2484, 174 L.Ed.2d 168 (2009) (concluding that a court could award private-school-tuition reimbursement to the parents of disabled children not provided a “Free Appropriate Public Education”). “The IDEA offers federal funds to states that develop plans to assure ‘all children with disabilities’ [residing in each such state] a ‘free appropriate public education,’ 20 U.S.C. § 1412(a)(1)(A).” Grim v. Rhinebeck Cent. Sch. Dist., 346 F.3d 377, 379 (2d Cir.2003). “To meet [the IDEA’S] requirements, a school district’s program must provide ‘special education and related services!,]’ [20 U.S.C. § 1401(9) ], tailored to meet the unique needs of a particular child, and be reasonably calculated to enable the child to receive educational benefits.” Gagliardo v. Arlington Cent. Sch. Dist., 489 F.3d 105, 107 (2d Cir.2007) (some internal quotation marks omitted); see also Grim, 346 F.3d at 379 (similar). These services “must be administered according to an ‘individualized education program’ ..., which school districts must implement each year for each student with a disability.” Id. (quoting 20 U.S.C. § 1414(d)). An individualized education program (“IEP”) is “a written statement that ‘sets out the child’s present educational performance, establishes annual and short-term objectives for improvements in that performance, and describes the specially designed instruction and services that will enable the child to meet those objectives.’ ” D.D. ex rel. V.D. v. N.Y.C. Bd. of Educ., 465 F.3d 503, 507-08 (2d Cir.2006) (quoting Honig v. Doe, 484 U.S. 305, 311, 108 S.Ct. 592, 98 L.Ed.2d 686 (1988)), amended on other grounds, 480 F.3d 138 (2d Cir.2007). Under the IDEA, for a child’s IEP to be adequate, it must be “[‘]likely to produce progress, not regression, and [must] ... afford[] the student with an opportunity greater than mere trivial advancement.’ ” T.P. ex rel. S.P. v. Mamaroneck Union Free Sch. Dist., 554 F.3d 247, 254 (2d Cir.2009) (quoting Cerra v. Pawling Cent. Sch. Dist., 427 F.3d 186, 195 (2d Cir.2005)). However, it need “not ... furnish every special service necessary to maximize each handicapped child’s potential.” Grim, 346 F.3d at 379 (quoting Bd. of Educ. v. Rowley, 458 U.S. 176, 199, 102 S.Ct. 3034, 73 L.Ed.2d 690 (1982)) (brackets, ellipsis, and internal quotation marks omitted). Under an IEP, “education [must] be provided in the ‘least restrictive setting consistent with a child’s needs.’” Id. (quoting Walczak, 142 F.3d at 122 (2d Cir.1998)). The IEP is “[t]he centerpiece of the IDEA’S educational delivery system.” D.D. ex rel. V.D., 465 F.3d at 507 (internal quotation marks omitted). “Since New York State receives federal funds under IDEA, it is obliged to comply with the requirements of this law. To meet these obligations and to implement its own policies regarding the education of disabled children, the State has assigned responsibility for developing appropriate IEPs to local Committees on Special Education [ (‘CSEs’) ], the members of which are appointed by school boards or the trustees of school districts.” Walczak, 142 F.3d at 123 (citing N.Y. Educ. Law § 4402(1)(b)(1)). “In developing a particular child’s IEP, a CSE is required to consider four factors: (1) academic achievement and learning characteristics, (2) social development, (3) physical development, and (4) managerial or behavioral needs.” Gagliardo, 489 F.3d at 107-08 (citing N.Y. Comp. Codes R. & Regs. (“NYCCRR”) tit. 8, § 200.1(ww)(3)(i)). “[T]he CSE must also be mindful of the IDEA’S strong preference for ‘mainstreaming,’ or educating children with disabilities ‘[t]o the maximum extent appropriate’ alongside their non-disabled peers.” Id. at 108 (citing 20 U.S.C. § 1412(a)(5)) (second set of brackets in original). If a New York parent “believe[s] an IEP is insufficient under the IDEA,” he or she “may challenge it in an ‘impartial due process hearing,’ 20 U.S.C. § 1415(f), before an [Impartial Hearing Officer, or THO’] appointed by the local board of education.” Grim, 346 F.3d at 379 (quoting N.Y. Educ. Law § 4404(1)). At the hearing before the IHO, “the school district has the burden of demonstrating the appropriateness of its proposed IEP.” Id. As the governing New York State statute explains: The board of education or trustees of the school district or the state agency responsible for providing education to students with disabilities shall have the burden of proof, including the burden of persuasion and burden of production, in any such impartial hearing, except that a parent or person in parental relation seeking tuition reimbursement for a unilateral parental placement shall have the burden of persuasion and burden of production on the appropriateness of such placement. N.Y. Educ. Law § 4404(1)(c). An IHO’s decision may, in turn, be appealed to a State Review Officer (“SRO”), who is an officer of the State’s Department of Education. Grim, 346 F.3d at 379-80. Generally, either “party aggrieved” by the findings of the SRO “shall have the right to bring a civil action” in either state or federal court. 20 U.S.C. § 1415(i)(2)(A). When such an action is brought in federal district court, the court reviews the records of all of the prior administrative hearings and must hear additional evidence if so requested by either of the parties. Id. at § 1415(i)(2)(c). The court typically considers the propriety of the IEP on the parties’ cross motions for summary judgment. However, a motion for summary judgment in an IDEA case often triggers more than an inquiry into possible disputed issues of fact. Rather, the motion serves as a pragmatic procedural mechanism for reviewing a state’s compliance with the procedures set forth in [the] IDEA [in developing the specific IEP at issue] and determining whether the challenged IEP is reasonably calculated to enable the child to receive educational benefits. Lillbask ex rel. Mauclaire v. State of Conn. Dep’t of Educ., 397 F.3d 77, 83 n. 3 (2d Cir.2005) (internal quotation marks omitted). “Though the parties in an IDEA action may call the procedure ‘a motion for summary judgment,’ the procedure is in substance an appeal from an administrative determination, not a summary judgment [motion].” Id. (ellipsis, brackets, and citation omitted). “[B]asing its decision on the preponderance of the evidence, [the court is required to] grant such relief as the court determines is appropriate.” § 1415(i)(2)(C)(iii). In the separate proceedings consolidated for purposes of this appeal, the parent plaintiffs assert that the school districts serving their children, having failed to provide each of them with a free appropriate public education (“FAPE”), must reimburse the parents for the costs associated with sending these children to private schools for an appropriate education. Although these cases are similar to many IDEA cases in this regard, see, e.g., Gagliardo, 489 F.3d at 106, they inevitably involve distinct facts and procedural histories. M.H. Background P.H., the son of M.H. and E.K., was born on October 11, 2001. He is autistic. During the 2006-07 school year, when P.H., was of pre-school age, he attended a mainstream preschool. Pursuant to a mandate of the Committee on Preschool Special Education (the “CPSE”) of the New York State Education Department, he received Special Education Itinerant Teacher (“SEIT”) services on a one-to-one (“1:1”) basis. The SEIT worked one-on-one with P.H. throughout the school day at P.H.’s home. Plaintiffs’ 56.1 Statement ¶¶ 2-3, M.H. v. N.Y.C. Dep’t of Educ., 712 F.Supp.2d 125 (S.D.N.Y.2010) (No. 09 Civ. 3657), ECF No. 13 (“Pis. 56.1 Stmt.”); Defendants’ 56.1 Response ¶¶ 2-3, M.H. v. N.Y.C. Dep’t of Educ., 712 F.Supp.2d 125 (S.D.N.Y.2010) (No. 09 Civ. 3657), ECF No. 19 (“Def.’s 56.1 Resp.”). Pursuant to the CPSE mandate, P.H.’s SEITs were trained in Applied Behavior Analysis (“ABA”) and provided at least 35 hours weekly of services using that approach. Pis.’ 56.1 Stmt. ¶¶ 2-3; Def.’s 56.1 Resp. ¶¶ 2-3. In addition, P.H. received several related services weekly, including five 60-min-ute speech therapy sessions; three 60-minute occupational therapy sessions; and two 60-minute physical therapy sessions. Pis.’ 56.1 Stmt. ¶ 4; Def.’s 56.1 Resp. ¶ 4. The DOE’s CSE convened a meeting on April 17, 2007, to discuss P.H.’s educational program for the 2007-08 school year— when P.H. would be in kindergarten — and to formulate his IEP for that year. Pis.’ 56.1 Stmt. ¶ 5; Def.’s 56.1 Resp. ¶ 5. The CSE comprised: (1) Giselle Jordan, a DOE representative and school psychologist who led the meeting; (2) P.H.’s SEIT; (3) a social worker; (4) a general education teacher; (5) a special education teacher; (6) P.H.’s parents; (7) an additional parent member of the CSE; and (8) the director of P.H.’s preschool program. Pis.’ 56.1 Stmt. ¶ 6. Jordan, as CSE team leader, was ultimately responsible for preparing P.H.’s IEP. Jordan had never met P.H. She testified that she prepared the IEP by reviewing all of the records provided to her and participating in the CSE meeting. Before the CSE meeting, P.H.’s parents provided the CSE with several documents, including: (1) a psycho-educational evaluation of P.H. and addendum prepared by Dr. David Salsberg, a supervising pediatric psychologist at NYU Medical Center, who treated P.H. privately; (2) P.H.’s speech, occupational, and physical therapy progress reports prepared by treating specialists; (3) an educational progress report from P.H.’s SEIT; (4) a social history update from a DOE social worker; (5) a classroom observation report by a different DOE social worker; and (6) a report prepared by P.H.’s pre-school teacher. Jordan testified in the subsequent proceedings before the IHO that it was her practice to review all submitted documents before the CSE meeting. According to the documents submitted to the CSE, along with a public-school placement, P.H. received occupational therapy, speech therapy, ABA therapy, and physical therapy at home. He was making moderate progress with this combination of mainstream placement and private support. The SEIT’s report stated that “[b]eing around typical peers [in the mainstream pre-school] ha[d] helped [P.H.] in his ability to communicate socially.” Overall, P.H. had made “substantial progress throughout the year.” M.H., Joint Appendix in Court of Appeals filed Oct. 13, 2010 (“M.H. J.A.”), at 1185. P.H.’s parents reported to the CSE that they thought he was “doing very well in his current mainstream placement and [was] flourishing with typical peers.” Id. at 1192. Dr. Salsberg’s report offered the view that P.H. should be placed in “a small classroom setting ... [that] provide[s] frequent opportunities for social interaction with peers.” Id. at 1144. Dr. Salsberg’s initial report did not mention ABA therapy, but his addendum stated that P.H. “requires 1:1 intensive language-based behavioral interventions by an experienced SEIT throughout the day,” and that P.H. “requires continuation of his home-based ABA, [occupational therapy,] and speech/language program.” Id. at 1189. P.H.’s preschool teacher similarly opined that P.H. required 1:1 support in order to function in the classroom setting. .She thought, though, that the classroom setting was not “an appropriate place” for him. Id. at 1159. As a result of the April 17 DOE CSE meeting, the CSE formulated an IEP for P.H. Pis.’ 56.1 Stmt. ¶ 22; Def.’s 56.1 Resp. ¶ 22. Under the IEP, P.H. would be placed in a special school in a special education class with a 6:1:1 student-teacher-paraprofessional ratio. The IEP also provided for (1) twice weekly 30-minute physical therapy sessions; (2) thrice weekly 30-minute occupational therapy sessions; and (3) thrice weekly 30-minute speech and language therapy sessions. Under this IEP, P.H. would thus receive fewer hours of these related services than he had been receiving under the prior year’s plan. Based on the IEP, by Final Notice of Recommendation dated July 11, 2007, the School District notified P.H.’s parents that he had been placed at the school denominated P.S. 94, a smaller school located within the building of P.S. 15, on East 4th Street in Manhattan. The parties dispute what happened after parents M.H. and E.K. received the IEP and Final Notice of Recommendation. The plaintiff parents assert that “[f]or two weeks” they “attempted to contact the proposed placement to schedule a visit to determine whether the class was appropriate for P.H. There was no answer at the school building and the parents’] messages were not returned.” Pis.’ 56.1 Stmt. ¶ 28. Thereafter, the parents say, they were directed to Ronnie Schuster, the principal at a different site, who, the parents were told, would be the principal at P.S. 94 in the fall. They assert that they visited Schuster’s then-school on August 7 or 8, 2007, to observe a class similar to the one in which P.H. would be enrolled at P.S. 94 pursuant to his IEP. They met Oliva Cebrian, a teacher who was to be the site leader at P.S. 94. Cebrian took them to observe a 6:1:1 summer-program class that, she said, was similar to the class P.H. could expect to enter in the fall. Id. ¶ 30. In their view, the children in the class were lower functioning than P.H. and had “little expressive language.” M.H. J.A. at 727. It appeared to M.H. that the teacher was only “babysitting” the children. Id. M.H. also contended that Cebrian told him that the mainstream children at the school did not act as though they welcomed special education children — the latter group ate lunch in a separate cafeteria and used a separate entrance to the school. After the visit, M.H. again contacted Schuster, seeking further information about the placement, including whether P.H. would be able to interact with mainstream students. Schuster referred him to another DOE employee, Sonia Royster, whom he then telephoned. When, according to M.H., Royster did not return the call, M.H. followed up by letter. According to M.H., Royster never responded. At about the same time, M.H. and E.K., who were not yet persuaded that the IEP’s placement was appropriate for their son, explored other options, including the Brooklyn Autism Center (“BAC”), a private school. The plaintiffs visited BAC and met with its educational director, Jaime Nicklas. BAC provides a program for autistic children that features intensive ABA 1:1 instruction to its five students; tuition is $80,000 per school year, payable at the beginning of each year. After the visit, the parents submitted an application to BAC. M.H. testified that with the start of the school year fast approaching, his intention was “to place [P.H.] temporarily if they’ll accept him into BAC in that program,” while M.H. continued to seek information regarding the IEP’s public school placement. M.H. J.A. 733. P.H. was accepted into BAC, and the plaintiffs signed the contract with the school and paid a deposit. On August 24, 2007, one week after signing the BAC contract, M.H. visited Royster — to whom Schuster had referred him — -at her office. According to M.H., Royster could not provide any further information about P.H.’s placement. M.H. asserts that he “literally had to camp out” at the CSE office “to get any information whether it be on [P.H.’s placement or] his related services.” M.H. J.A. 736. On the first day of school at P.S. 94— September 10, 2007 — according to M.H., having failed to get any information from Royster, M.H. again contacted Schuster. When, he says, he did not receive a response, he followed up by email on September 14, inquiring whether he could visit the proposed placement. He did not receive a responsive email until nine days later, on September 19. The next day, after observing two different classes at P.S. 94, M.H. was of the view that neither was an appropriate place for his son: In one, the students were young and, unlike P.H., nonverbal and not toilet trained; in the second, the students were many years P.H.’s senior. M.H. also thought that P.H. would not benefit from the instruction offered in the classes, both because the school offered only minimal ABA 1:1 therapy and because, M.H. thought, the methodologies the school did use would not work for P.H. The DOE contends that it could have offered P.H. placement in yet a third class, but does not suggest that it so informed M.H. After visiting P.S. 94, the parents decided to keep P.H. at BAC for the 2007-OS school year, and paid the remainder of the $80,000 tuition in full. By letter dated October 30, 2007, M.H. and E.K., through counsel, requested a due process “impartial hearing” and sought reimbursement for P.H.’s BAC tuition. In that request, they alleged that the DOE failed to provide P.H. with a FAPE, developing instead a procedurally and substantively unreasonable IEP. The parents also asserted three specific procedural challenges to the IEP: (1) that the annual goals and short-term objectives presented for P.H. were “generic and vague,” and lacked evaluative criteria, in violation of the IDEA; (2) that the CSE failed to conduct an Functional Behavioral Assessment (“FBA”) to evaluate P.H.’s social needs; and (3) that the IEP ultimately did not mandate social and emotional counseling for P.H. despite acknowledging at one point in the document that such counseling was necessary. The plaintiffs also asserted that the IEP was substantively inadequate because the classrooms identified for P.H. did not meet his needs and would not have provided him with an educational benefit. As is required under the IDEA, in response to the parents’ request, a DOE IHO conducted a hearing to review the IEP. The hearing lasted eight non-eontiguous days between January 30, 2008, and September 5, 2008. M.H. J.A. 1345. The DOE, which bore the burden of proof, presented testimony by: Giselle Jordan, the CSE organizer and drafter of the IEP; and Susan Cruz, an Assistant Principal at the proposed placement. Id. at 1345-47. Jordan testified, among other things, that she had reviewed all of the documents submitted to the CSE committee. She stated that P.H. did not demonstrate behavioral problems that interfered with his learning; described the CSE meeting and the process of producing the IEP; and discussed P.H.’s test scores. Cruz explained the structure and programming at P.S. 94. Later, on rebuttal, the DOE also called Elizabeth Washburn, a teacher at P.S. 94, and Kay Cook, a “coach” who trains DOE staff on teaching methodologies for autistic students including ABA, TEACCH, and PECS, the latter being the principal methodologies used at P.S. 94. The plaintiffs presented testimony by BAC director Jaime Nicklas; P.H.’s treating psychologist Dr. David Salsberg; P.H.’s speech pathologist Miranda White; and M.H., P.H.’s father. In addition to explaining BAC’s program, Nicklas described the ABA methodology in depth and voiced her opinion that ABA is “the only empirical method approved to treat children with autism.” M.H. J.A. at 454. She admitted, however, that “a strict ABA program is not appropriate for every single child,” and that higher functioning children would not benefit from being in a “more restrictive environment ... if they can communicate and if they can learn in a large group setting.” M.H. J.A. at 467. She also testified that based on her observation of P.H., it was clear to her that he needed an ABA program to progress. Finally, Nicklas testified that P.H. had made great strides during his time at BAC, learning to identify objects he wanted, asking for help, walking quietly, and identifying basic numbers and words, among other things. Dr. Salsberg’s testimony focused on the importance of ABA treatment to P.H.’s continued progress. After hearing the testimony, the IHO issued her findings and decision. She agreed with the parents that the IEP’s annual goals and objectives were “generic and vague” and “not based on his actual needs and ■ abilities, but on the grade he was expected to be placed in.” M.H. J.A. at 1356. In support of this conclusion, the IHO cited Jordan’s testimony to the effect that prior to the IEP meeting she thought P.H. would be entering first grade, and that, after learning that he would in fact be entering kindergarten, she changed the annual goals but did not change the short-term goals and objectives. Id. The IHO also agreed with the parents that “some of the April 2007 IEP annual goals and short term objectives in reading comprehension, reading skills and math [were] not measurable since they d[id] not contain evaluative criteria, evaluation procedures and schedules to be used to measure progress.” Id. The IHO then discussed her review as to the appropriate method for teaching P.H. Although the parents did not specifically raise this issue in their letter requesting the hearing, the IHO characterized the parents as “contending] that the appropriate methodology for the student was ABA discrete] trial instruction.” Id. at 1357. According to the IHO, P.H.’s “evaluations support their claim.” Id. The IHO then decided that the IEP’s proposed placement did not offer sufficient 1:1 ABA instruction, but that the BAC did. Id. Finally, the IHO concluded that because BAC was an appropriate place for P.H. and because equitable considerations favored the parents, reimbursement of P.H.’s BAC tuition costs was appropriate. Id. The DOE appealed the IHO’s decision to the SRO. On December 10, 2008, the SRO issued a decision reversing the IHO. Id. at 1362. After recounting the facts in some detail, the SRO addressed the DOE’s contention that because the parents did not raise the question of educational methodology in their letter requesting the due process hearing, the IHO should not have considered it. He concluded that in light of the parents’ failure to include such a claim in their letter, it was “procedurally improper for the [IHO] to bas[e] her finding that the district did not provide the student a FAPE in part on her determination that the appropriate methodology for [P.H.] was ABA.” Id. at 1372. Turning to the merits, the SRO “f[ound] that the ... annual academic goals [contained in the IEP] were appropriate for [P.H.] and that they provided meaningful guidance to the teacher responsible for implementing the goals.” Id. at 1374. With regard to the IEP’s “non-academic goals,” the SRO acknowledged that some of those contained in the IEP “lacked a written specified level of difficulty when isolated out of context and viewed alone,” but thought that because “the majority of the student’s short-term objectives were both detailed and measurable,” this cured any deficiencies with the annual goals. Id. The SRO was also satisfied that the “IEP ... contained sufficient goals and short-term objectives relating to [P.H.’s] social/emotional needs.” Id. He also noted that “although not dispositive,” the parents did not express any concern about the specificity of the IEP’s goals until they filed their hearing request letter. Id. at 1375. Turning to the substance of the program endorsed by the IEP, the SRO determined that although the parents “previously indicated that they believed [P.H.] was doing ‘very well’ in his mainstream preschool setting with SEIT support and they wanted him to be placed in a similar setting for kindergarten, the hearing record does not support that a general education setting would be appropriate [for P.H.].” Id. (citation omitted). The SRO then cited testimony regarding P.S. 94’s use of “various methodologies,” and concluded that “the recommended placement was reasonably calculated to enable [P.H.] to obtain educational benefit.” Id. The SRO thus decided that the IHO had “erred in [her] determination that the district did not offer [P.H.] a FAPE for the 2007-08 school year.” Id. The SRO therefore did not reach the question of whether BAC was an appropriate unilateral placement. M.H. and E.K., on behalf of P.H., challenged the SRO’s decision through a civil action brought in the United States District Court for the Southern District of New York. By complaint dated April 9, 2009, the plaintiffs sought “(a) a modified de novo review and reversal of the ... [SRO]’s December 10, 2008 Decision ...; (b) a determination that M.H. and E.K. and P.H. have met the applicable Second Circuit standard for reimbursement of tuition paid for the unilateral provision of special education services to P.H.; (c) an order directing defendant to reimburse plaintiff, as requested, for the provision of such educational services; and (d) an order granting plaintiff leave to file a fee application pursuant to the fee shifting provisions of the statute.” Compl. at 2, M.H. v. N.Y.C. Dep’t of Educ., 712 F.Supp.2d 125 (S.D.N.Y.2010) (No. 09 Civ. 3657), ECF No. 1. The parties then cross-moved for summary judgment. By a lengthy and detailed Opinion and Order dated May 10, 2010, the district court (Loretta A. Preska, Chief Judge) reversed the SRO, agreeing with the IHO instead. M.H. v. N.Y.C. Dep’t of Educ., 712 F.Supp.2d 125 (S.D.N.Y.2010). After a careful rehearsal of the facts, the court engaged in a point-by-point consideration of the IHO’s and SRO’s decisions. First, the district court decided that the SRO had erred by declining to consider the plaintiffs’ evidence regarding the proper methodology for teaching their son. Id. at 148-52. In the district court’s view, it was the DOE that first raised the issue of methodology. The plaintiffs could not fairly be precluded from responding. Id. Second, the district court concluded that the IEP did not comply with IDEA’S procedural requirements. In analyzing the issue, the court began with the observation that the opinion of the SRO was neither cogently reasoned nor supported by adequate evidence. The court therefore based its analysis on the reasoning and conclusions of the IHO. The district court thought them clear and in accordance with the applicable standards previously set forth by this Court. Id. at 153-63. The district court did not, however, fault the CSE for its failure to conduct a Functional Behavioral Assessment. An FBA is the “process of determining why a student engages in behaviors that impede learning and how the student’s behavior relates to the environment.” NYCRR tit. 8, § 200.1®. The CSE did not conduct an FBA before adopting P.H.’s IEP. In P.H.’s case, an FBA would have considered why he engaged in abnormal behavior such as repeatedly biting his hand, screaming, and self-stimulating, or “stimming.” Pis.’ 56.1 Stmt. ¶¶ 15-16. As the district court noted, “[flailure to conduct an FBA does not amount to a procedural violation of the IDEA where the IEP sets forth other means to address the student’s problematic behaviors.” Id. at 158. The court concluded that because the IEP identifies P.H.’s problematic behavior but states that it does not render him entirely unteachable, the SRO’s determination that the absence of an FBA did not render the IEP unreasonable was appropriate. Id. at 159. With regard to the IEP’s substantive compliance with IDEA mandates, the district court relied on the IHO’s opinion rather than that of the SRO. Id. at 159-66. The court agreed with the IHO’s conclusion that the IEP did not provide a program that would meet P.H.’s needs. Id. The court also accepted the IHO’s determination that the classroom identified for P.H. was not appropriate because it did not provide sufficient ABA therapy. Id. at 161-63. Finally, the court agreed with the IHO that BAC was an appropriate unilateral placement, and that equitable considerations favored reimbursement. Id. at 163-70. The court therefore granted the plaintiffs’ motion for summary judgment, denied the defendant’s, and ordered the DOE to reimburse the plaintiffs for P.H.’s 2007-08 BAC tuition. Id. at 170. M.S. Background M.S. and L.S.’s son, D.S., was diagnosed with an autism spectrum disorder- — more specifically, Pervasive Developmental Disorder — when he was 17 months 'old. Immediately thereafter, D.S. began to receive services from the New York State Early Intervention program (“E.I.”), including 20 hours per week of special education involving a combination of ABA and other therapy techniques. M.S., Joint Appendix in Court of Appeals filed Oct. 29, 2010 (“M.S. J.A.”), at 912. He also received occupational and physical therapy. Id. Within a year it became clear that methodologies other than ABA were not working for D.S. His therapy was therefore increased to 30 hours of ABA each week. By the time D.S. “aged out” of E.I., he was receiving 40 hours of ABA therapy with an SEIT, in addition to five hours per week of speech and occupational therapy and two hours per week of physical therapy, each of them in one-hour sessions. D.S. continued to receive this program by mandate of the CPSE. At four years old, D.S. was totally non-verbal, engaged in “extremely high rates of self-stimulatory behaviors,” and displayed “distraetible tendencies [that] profoundly interfere[d] with his learning and ability to attend to people and things in his environment.” M.S. J.A. 234. In addition, he often put nonedible objects into his mouth. Beginning with the 2007-08 school year, D.S. was considered by the CPSE to be a “school aged” child. He was therefore required to have an IEP created for him by a CSE — a Committee on Special Education — rather than an educational plan prescribed by the DOE’s CPSE. In late May 2007, L.S., D.S.’s mother, was notified that the CSE would be meeting to consider the issue. L.S. telephoned Dr. Bowser, the district representative responsible for D.S.’s IEP, to schedule the meeting and offered to provide Dr. Bowser with evaluations of D.S. by his then-caregivers. Dr. Bowser informed L.S. that she could bring the evaluations to the CSE meeting rather than sending them to Bowser so that she could review them in preparation for the meeting. The CSE convened a meeting on June 4, 2007, to discuss D.S.’s IEP for his kindergarten year. In attendance were, inter alios, (1) L.S.; (2) a special education teacher; (3) a general education teacher; and (4) Dr. Bowser. DOE evaluator Marion Pearl addressed the meeting by phone. The meeting lasted 45 minutes. At the beginning of the meeting, Dr. Bowser informed L.S. that although she had a right to have a parent member present, no parent member was available to attend that day. According to L.S., Bowser appeared “quite stressed” about getting the IEP done by early June. L.S. therefore “felt pressured to have the meeting” even without a parent member present. M.S. J.A. 918. L.S. therefore signed a waiver agreeing to the absence of the parent member. Id. The group received several written reports from D.S.’s educational service providers. D.S.’s occupational therapist reported that D.S.’s progress had been “extremely slow,” and that “[i]t is essential that [D.S.] receive[ ] [occupational therapy] 5 times a week for at least 60 minutes in order to make adequate progress.” M.S. J.A. 251. D.S.’s speech therapist wrote that as of that time, D.S. had “never spoken” and could “not effectively communicate pain or discomfort ... [or] basic wants or needs.” Id. at 247. She thought it to be “imperative that [D.S.] continue[s] to receive speech and language therapy for no [fewer] than [5] times weekly for [60] minute session to maintain and carryover learned skills thus far, and to help him to communicate spontaneously.” Id. D.S.’s physical therapist “recommended that [D.S.] continue to receive physical therapy services as per mandate” to continue his improvement. Id. at 249. The CSE group also received a report from DOE evaluator Pearl, who, according to L.S., recommended that D.S. be placed in an ABA program. Jill Weynert, D.S.’s preschool program coordinator and a certified behavior analyst, expressed the view at the IHO hearing that D.S. “absolutely needed a one to one — he needed an ABA program.” Id. at 481. Weynert explained that D.S. “had a hard enough time learning with one to one,” and that he “wouldn’t be able to learn” in a group setting. Id. at 483-84. She also stated that unlike most children, D.S. would not benefit from being exposed to peers in a classroom environment because he could not “attend to other kids.” Id. at 484. According to Weynert, there was no discussion at the CSE meeting of D.S.’s progress over the previous year, or whether he had achieved any of the annual or short-term goals that the CPSE had theretofore set out for him. L.S. later testified before the DOE IHO that during the meeting, Bowser indicated that D.S. would be placed in a 6:1:1 program despite L.S.’s “expressed ... concerns” about such a placement. M.S. J.A. 921. L.S. requested that the CSE consider programs like the one at the New York City Charter School of Autism, which provides 1:1 ABA therapy. Spaces at the City School of Autism are allocated by lottery. D.S. had not been chosen. But L.S. hoped the DOE might be able to offer a similar program elsewhere. Dr. Bowser informed L.S. that “all ... she could offer at th[e] time ... was a 6:1:1 placement, that was all that was available.” Id. Ultimately, D.S.’s IEP did not reflect his progress during the previous year or how that progress might call for altering goals for the subsequent year. Instead, the team photocopied D.S.’s goals and objectives from the previous year’s CPSE plan for use in the then-current year despite the fact that those goals and objectives were not only a year old, but had been drafted for the home-based 1:1 program D.S. was offered that year and were therefore, according to M.S. and L.S.’s arguments, inapplicable to the then-current year. The CSE, led by Bowser, ultimately recommended in the IEP that they approved for D.S. that he attend a classroom-based 6:1:1 program in a District 75 school. The IEP noted that the committee had considered and rejected five other types of placements, including general education and a 12:1:1 special education class in a District 75 school. The plan did not, however, reflect any consideration by the committee of a 1:1 ABA program. The IEP also reduced D.S.’s related services, directing that he receive thirty minutes each of occupational, physical, and speech therapy, five times per week, and thirty minutes of counseling three times weekly. After receiving a final notice of D.S.’s placement at P.S. 94 (part of P.S. 196) in late-June 2007, L.S. visited the school, accompanied by Dr. Weynert. For two hours, they observed the class to which D.S. would be assigned. L.S. later reported that the class had only one non-verbal student, and that the book he used for communicating — his PECS book— stayed in his desk the entire time she was there, leaving him with no way to communicate. L.S. also noted that although she had been told that the non-toilet-trained students in the class were brought to the bathroom every 30 minutes, she did not observe them being taken to the restroom at all in her two hours there. L.S. also expressed concern that the teachers were not adequately trained, that the students’ self-stimulatory behaviors went unchecked, and that D.S.’s “mouthing” behaviors — i.e., his tendency to put anything and everything in his mouth— were dangerous and would not be properly monitored at the school. When L.S. raised these issues with P.S. 94’s principal Ronnie Schuster, she agreed that “she in fact would be concerned for [D.S.’s] safety” there, particularly if he did not have a paraprofessional devoted to him throughout the day. MS. J.A. at 936. Teachers at the school indicated that the school did provide ABA programs to some students, but these programs were not individualized and were offered in only part of the special education classroom. At the end of the visit, L.S. “felt strongly that I was in agreement with the experts, the professionals, the doctors, the educators, who had all — all told me that” D.S. would not fare well in a 6:1:1 setting. Id. at 941. In light of their discomfort, D.S.’s parents explored private school options for D.S., including the BAC. D.S. was accepted to BAC and another specialized school. His parents chose to enroll him at BAC, which offers only ABA 1:1 teaching. They signed a contract with BAC pledging to pay the $80,000 tuition for the 2007-08 school year. By letter dated December 28, 2007, the plaintiffs filed with the DOE a request for an impartial hearing. In the letter, the plaintiffs alleged that the DOE failed to provide D.S. a FAPE for the 2007-08 school year inasmuch as: (1) the CSE team was not properly constituted at the June 4, 2007, meeting at which the individualized education plan was developed, because it lacked a parent member, and the general education teacher was present for only part of the meeting; (2) the IEP failed to set new goals for D.S. for the relevant school year, instead photocopying his goals from the previous year, which had been developed for a 1:1 program and did not reflect D.S.’s progress during the prior year; (3) the IEP failed to explain why D.S.’s related services were reduced; and (4) the 6:1:1 program to which D.S. had been assigned could provide neither an appropriate peer group nor adequate supervision and instruction. The parents sought reimbursement for D.S.’s BAC tuition for that year. The IHO convened a hearing comprising six hearing days between April 9, 2008, and October 8, 2008. At the hearing, the DOE called as witnesses: (1) Dr. Bowser; (2) Alex Campbell, a special education teacher who was in charge of the 6:1:1 class to which the IEP had assigned D.S.; and (3) Susan Cruz, an assistant principal of P.S. 94, who testified generally about the school. Bowser was the DOE’s principal witness. She testified that while she had not met or observed D.S., her review of his records convinced her that a general education setting was not appropriate for him. She stated that all parties present at the CSE meeting agreed with that assessment, and that the IEP therefore required specialized schooling with the addition of twelve months of related services. Dr. Bowser endorsed the 6:1:1 placement, explaining that a small class size was required because D.S. “must be carefully supervised at all times during the day, because he [is] unaware of danger.” M.S. J.A. at 55-56. However, Bowser later conceded that she did not know of any program other than 6:1:1 that the DOE could offer to autistic children, thereby implying that she did not consider whether a 1:1 program might be more appropriate. She further stated that the related services were all necessary, explaining that although D.S. would receive fewer hours of in-home services, he would be receiving similar services in the classroom setting, so that “in effect, he would be getting more services.” Id. at 60. Dr. Bowser conceded that the CSE team had incorporated goals for D.S. that had been photocopied from the prior year’s plan, but stated that they had discussed “every goal,” and determined that each was still appropriate because it had not yet been met. Id. at 61. Dr. Bowser further stated that she had reviewed the evaluations from D.S.’s treating doctors and therapists, and that she agreed with most of them but disagreed with one doctor’s recommendation that D.S. required attention seven days a week. Alex Campbell, a special education teacher with seven years’ experience and training in various methodologies including ABA, TEACCH, and PECS, also testified. Campbell, who would have been D.S.’s teacher had D.S. attended public school, testified that 6:1:1 learning can be appropriate for autistic children because it can provide them with both individualized attention and opportunities for group work. She said that there were four autistic children in her class in 2007-08, all of them around D.S.’s age, and that she maintained frequent and open communication with all the students’ parents by phone and by notebook that was passed back and forth between school and home. She reported that all the students progressed over the course of the year. The plaintiffs called several witnesses. Their first was Dr. Weynert, D.S.’s program coordinator from 2005-2007. According to Weynert, D.S.- initially, in 2005, “presented ... really no notable functional skills. He engaged in extremely high rates of self-stimulatory behaviors — verbal and motor. He was unable to ... play with any toy in the way it was intended ... [A]ny object was used to engage in self-stimulatory behaviors.” Id. at 471. She testified that D.S. “had the toughest time learning,” but that after almost two years of intensive 1:1 ABA therapy for up to 35 hours a week, and many hours per week of related services, D.S. was able to “learn how to learn.” Id. at 474. He nonetheless remained non-verbal and easily distracted, and continued to engage in high rates of self-stimulatory behavior. Weynert opined that 1:1 instruction was “absolutely” the proper course for D.S. Id. at 481. Dr. Weynert also testified that at the June 2007 CSE meeting, the committee engaged in no discussion of methodology other than listening to Weynert’s recommendation that D.S. be provided ABA 1:1 instruction. With regard to D.S.’s related services, Weynert testified that she “strongly, strongly advised against” the reduction of D.S.’s various therapies, but that the CSE told her that “[t]hat’s [all] they could do.” Id. at 493. Weynert explained that 30-minute sessions would be unproductive for D.S. because “to engage [him] takes some time.... And a half an hour, by the time you sat down with him and really began to do anything your session would be over.” Id. at 494. During her testimony, Weynert discussed the visit she and L.S. had made to P.S. 94 to observe the class to which D.S. had been assigned. She reported that the teacher had “minimal” ABA training and that any ABA instruction was not tailored to the individual children. She reported that the assistant teacher was scolding a non-verbal child who was seeking attention rather than helping him communicate. Weynert said that no data was being collected on the children’s behaviors and no “behavior reduction plans” were in place. Id. at 499-500. She further testified that she had visited BAC before D.S. enrolled there, and had been impressed with that program. Weynert did concede, however, that she had never observed D.S. himself in a BAC classroom. The plaintiffs also called Jaime Nicklas, the BAC director who also testified in P.H.’s due process hearing. She explained that BAC offers full-time 1:1 ABA education to five autistic students each year. While she acknowledged that ABA is not the only methodology that can be used to educate children on the autistic spectrum, id. at 569, she stated that it was the most appropriate program for D.S. based on his “severe[ ]” autism and his need for “intensive one on one services.” Id. at 572. Nicklas explained that during a typical day at BAC, D.S. would work with five different instructors who would rotate between the students to ensure that a child could generalize what he had learned. He had opportunities to interact with mainstreamed children during non-academic activities. BAC does not, however, offer related services such as speech therapy in school. Instead, the students receive those services at home. Id. at 608. Nicklas testified that D.S. has made “a lot of progress” at BAC; his speech, while challenging, “is coming along,” and “his behaviors have gotten a lot better.” Id. at 603. For example, D.S. now “walks with his hands in his pockets. His tapping behavior has decreased significantly”; “his awareness has seemed to increase.” Id. Finally, L.S., D.S.’s mother, testified. In addition to providing basic background information on D.S., she discussed her experiences at the CSE meeting and observing the proposed placement at P.S. 94. She said that at BAC, D.S. had continued to learn to communicate using an augmentative device called a Dyanvox, that his ability to identify shapes, items, and body parts had increased, and that his motor and play skills had improved. By opinion dated October 22, 2008, the IHO rejected the plaintiffs’ challenge, concluding that the DOE had offered D.S. a FAPE for the 2007-08 school year. As to the plaintiffs’ procedural complaints, while the IHO acknowledged that some of the proceedings, including the DOE’s practice of encouraging parents to waive the participation of a parent member, were troubling, the IHO thought that they did not rise to the level of the denial of a FAPE. The IHO further found that L.S. was provided sufficient opportunity to participate meaningfully in the CSE meeting, and that the limited involvement of the general education teacher was not material in light of the agreement by all CSE members that general education was not appropriate for D.S. The IHO was also untroubled by the IEP’s wholesale importing of D.S.’s goals from the previous year. In the IHO’s view, those goals remained appropriate in light of the testimony that D.S. learned very slowly. As for the plaintiffs’ objections to the substance of the IEP, the IHO concluded that the 6:1:1 class was “substantively appropriate and calculated for [D.S.] to make educational progress.” M.S. v. N.Y.C. Dep’t of Educ., Special Appendix (“M.S. S.P.A.”) at 78. Specifically, the IHO cited Dr. Bowser’s testimony explaining the rationale for placing D.S. in a 6:1:1 setting, including that it would “address! ] a lot of the issues that were being brought up in the IEP,” and would “enable [D.S.] to make some success, improve his skills, and get individualized assistance, with people who understand autism.” Id. at 79. The IHO was persuaded that the CSE committee had “looked very carefully at [D.S.’s] need to be carefully supervised at all times,” and had taken that into account in assigning him to a class with one teacher and one paraprofessional. Id. With regard to the reduction in D.S.’s related services, the IHO noted that D.S. had received the IEP-authorized services during the 2007-08 school year in the amounts specified in the IEP, and that L.S. testified that D.S. nonetheless had made progress. The IHO therefore concluded that the parents were “precluded from making the argument that the [related services] amount recommended [was] inappropriate.” Id. at 83. With regard to methodology, the IHO decided that although the people treating D.S. all recommended that he continue in 1:1 ABA, “the people who recommended it believed that it was the only methodology that worked and were not open to other approaches.” Id. at 84. The IHO cited the testimony of Weynert and Nicklas to support this conclusion. Id. But the IHO also noted that an IEP “need not specify or provide one type of methodology,” but that it “must provide for specialized instruction in the child’s areas of need.” Id. The IHO was satisfied that D.S.’s IEP met that requirement. Id. Finally, the IHO rejected the parents’ argument that the P.S. 94 teachers were not “sufficiently trained and knowledgeable regarding [D.S.’s] needs.” Id. at 85. The IHO concluded that the evidence amply supported the finding that the teachers were qualified. For the foregoing reasons, the IHO denied the parents reimbursement for the $80,000 BAC tuition. Id. The parents, M.S. and L.S., appealed the IHO’s decision to an SRO. By decision dated January 9, 2009, the SRO dismissed the appeal. Id. at 65. After summarizing the factual and procedural history at some length, the SRO briefly considered the parties’ arguments. He first addressed the IEP’s alleged procedural defects, concluding that, “[b]ased on the hearing record and the particular facts before [him], and upon a complete and independent review of the hearing record, [he was] not persuaded that the [IHO] erred in finding ... that the student was offered a FARE for the 2007-08 school year.” Id. at 65. The SRO did not discuss any of the procedural or substantive arguments individually, instead rehearsing the language of the regulations implementing the IDEA and then stating that he “f[ound] no need to modify the [IHO’s] decision.” Id. In light of this conclusion, the SRO, like the IHO, did not reach the question whether BAC was an appropriate unilateral placement. Id. On May 8, 2009, the plaintiffs filed a complaint in the United States District Court for the Southern District of New York seeking review of the SRO’s decision. The district court judge to whom the case was assigned, Hon. Lewis A. Kaplan, referred the case to Magistrate Judge James C. Francis IV for further proceedings, including a Report and Recommendation on any dispositive motion. See Report & Recommendation, M.S. & L.S. v. N.Y.C. Def't of Educ., 09 Civ. 4454(LAK)(JCF) (S.D.N.Y. Mar. 12, 2010), ECF No. 25 (“R & R”). By motions filed on October 21, 2009, the parties cross-moved for summary judgment. On March 12, 2010, the magistrate judge recommended that the district court deny the plaintiffs’ motion and grant the DOE’s, thereby leaving in place the IHO’s findings that the DOE provided D.S. with a FAPE for 2007-08. R & R at 1. The magistrate judge set forth in the R & R a detailed factual history of the case, summarizing the testimony before the IHO. He then turned to the issue he thought dispositive: the degree of deference owed to administrative decision makers in IDEA cases. Id. at 34-35. He found this case to be indistinguishable from Grim for purposes of determining the standard-of-review. There, we concluded that the IDEA “strictly limitfs] judicial review of state administrative decisions.” R & R at 34 (quoting Grim, 346 F.3d at 380-81). He noted Grim’s instruction that “the sufficiency of goals and strategies in an IEP is precisely the type of issue upon which the IDEA requires deference to the expertise of administrative officers.” Id. at 36 (quoting Grim, 346 F.3d at 382). With this in mind, the magistrate judge determined that he was required to defer “to administrative decisions on most issues relating to educational policy, whether or not they are controversial.” Id. He said that although a court would be adept at determining if [the CSE] properly made [a determination about how to educate a child], ... this Circuit leaves little room to analyze substantive deficiencies in the evidence presented by the DOE at the hearing. Instead, case law appears to indicate that as long a[s] the DOE is able to produce an expert to support its position at a hearing and receives a positive determination by at least one of the administrative officers, the DOE’s position is nearly assured victory in the federal courts. Id. at 36-37 (citations omitted). The magistrate judge “question[ed] whether the degree of deference to educational administrators required by Grim [ ] and other Second Circuit cases is consistent with the intent of Congress when it passed the IDEA,” but concluded that he was “nonetheless bound by those decisions.” Id. at 41. The magistrate judge then addressed the merits of the plaintiffs’ arguments. As for the plaintiffs’ procedural challenges to the IEP, he noted that he was required to defer “to the determinations of the SRO and IHO regarding the prejudicial impact” of any procedural irregularities, id. at 43 (describing Matrejek v. Brewster Cent. Sch. Dist., 471 F.Supp.2d 415, 426 (S.D.N.Y.2007), aff'd, 293 Fed.Appx. 20 (2d Cir.2008)), even though he thought it “unclear why such deference is appropriate, given that determining procedural compliance with the IDEA does not appear to require expertise in the field of education,” R & R at 43-44. With regard to the composition of the CSE, the magistrate judge concluded that any error in urging L.S. to waive the presence of a parent member did not rise to the level of denying D.S. a FAPE. Id. at 44-46. As for the parents’ argument that “they were denied meaningful participation in the development of D.S.’s IEP because the CSE failed to rely on current evaluations of D.S.,” id. at 46, he concluded that “[although the plaintiffs’ claims ... are troubling, they do not establish impermissible predetermination [of the IEP] in view of Dr. Bowser’s testimony and the deference afforded SRO and IHO determinations under this Circuit’s precedent,” id. at 48. On the last alleged procedural error, the incorporating of D.S.’s goals from the prior year into the 2007-08 IEP, the magistrate judge expressed “skepticism that all 22 pages of goals and short-term objectives were reviewed in the course of [the] 45-minute [CSE] meeting that was not solely focused on this information,” but concluded that the court “[could not] disagree with the IHO’s ultimate conclusion.” Id. at 50. Turning to the plaintiffs’ challenge to the substantive adequacy of the IEP, the magistrate judge “agree[d] with the plaintiffs that it is doubtful that D.S.’s IEP was sufficiently individualized [and] share[d] their concern that D.S. would not progress at P.S. 94.” Id. at 54. He nevertheless thought himself “constrained to defer to the determination of the IHO and SRO” that the IEP was substantively appropriate, id. at 55, despite the testimony by “[t]hose who had met and evaluated [D.S., who] insisted that he required 1:1 ABA therapy in order to progress.” Id. at 54. In reluctantly reaching this conclusion, the magistrate judge wrote: “[I]t is curious that experts with experience working with the child at issue [i.e., D.S.’s examining doctors, therapists and SEIT instructor] do not receive similar deference” to the administrative review officers. Id. at 55. The plaintiffs filed objections to the R & R. By order dated May 14, 2010, however, the district court adopted the R & R in its entirety. See Order, M.S. & L.S. v. N.Y.C. Dep’t of Educ., 09 Civ. 4454(LAK)(JCF) (S.D.N.Y. May 14, 2010), ECF. No. 32. The court noted that it “differ[ed] from the magistrate judge only as to the suggestion that he might have decided the matter differently but for feeling constrained by the degree of deference owed to administrative decisions in this context under established Second Circuit precedent.” Id. In the district court’s view, “[i]t [was] entirely unnecessary for [it] to express any view on that question.” Id. The court therefore granted the defendant’s motion for summary judgment. DISCUSSION I. Deference Owed to Administrative Findings “Our standard for reviewing a state’s administrative decisions in IDEA cases is ... well established.” T.Y. v. N.Y.C. Dep’t of Educ., 584 F.3d 412, 417 (2d Cir.2009), cert denied, — U.S.-, 130 S.Ct. 3277, 176 L.Ed.2d 1183 (2010). “The responsibility for determining whether a challenged IEP will provide a child with an appropriate public education rests in the first instance with administrative hearing and review officers. Their rulings are then subject to ‘independent’ judicial review.” Walczak, 142 F.3d at 129. Nonetheless, “the role of the federal courts in reviewing state educational decisions under the IDEA is ‘circumscribed.’ ” Gagliardo, 489 F.3d at 112; see also Grim, 346 F.3d at 380-81 (interpreting the IDEA as “strictly limiting judicial review of state administrative decisions”). A reviewing court “must engage in an independent review of the administrative record and make a determination based on a ‘preponderance of the evidence.’ ” Gagliardo, 489 F.3d at 112; see also Rowley, 458 U.S. at 206, 102 S.Ct. 3034. But such review “is by no means an invitation to the courts to substitute their own notions of sound educational policy for those of the school authorities which they review.” Rowley, 458 U.S. at 206, 102 S.Ct. 3034. “To the contrary, federal courts reviewing administrative decisions must give ‘due weight’ to these proceedings, mindful that the judiciary generally ‘lacks the specialized knowledge and experience necessary to resolve persistent and difficult questions of educational policy.’ ” Gagliardo, 489 F.3d at 113 (quoting Rowley, 458 U.S. at 206, 208, 102 S.Ct. 3034) (brackets omitted); see also Walczak, 142 F.3d at 129 (“While federal courts do not simply rubber stamp administrative decisions, they are expected to give ‘due weight’ to these proceedings....”) (citation omitted). District courts are not to make “subjective credibility assessments],” and cannot “ch[oose] between the views of conflicting experts on ... controversial issue[s] of educational policy ... in direct contradiction of the opinions of state administrative officers who had heard the same evidence.” Grim, 346 F.3d at 383. As the Supreme Court has said, “once a court determines that the requirements of the Act have been met, questions of methodology are for resolution by the States.” Rowley, 458 U.S. at 208, 102 S.Ct. 3034. Courts generally “defer to the final decision of the state authorities, even where the reviewing authority disagrees with the hearing officer.” A.C. ex rel. M.C. v. Bd. of Educ. of the Chappaqua Cent. Sch. Dist., 553 F.3d 165, 171 (2d Cir.2009) (quoting Karl ex rel. Karl v. Bd. of Educ. of Geneseo Cent. Sch. Dist., 736 F.2d 873, 877 (2d Cir.1984)) (internal quotation marks omitted). “If the SRO’s decision conflicts with the earlier decision of the IHO, the IHO’s decision may be afforded diminished weight.” A.C., 553 F.3d at 171 (internal quotation marks omitted); see also Gagliardo, 489 F.3d at 114 n. 2 (same). “Deference is particularly appropriate when ... the state hearing officers’ review has been thorough and careful.” Walczak, 142 F.3d at 129. The SRO’s or IHO’s factual findings must be “reasoned and supported by the record” to warrant deference. Gagliardo, 489 F.3d at 114. And in our review of a district court’s decision under the IDEA, deference to “administrative proceedings is particularly warranted where ... the district court’s decision was based solely on the administrative record.” A.C., 553 F.3d at 171. These principles are more easily stated by appellate courts, even if at some length, than they are applied by district courts, as the cases before us illustrate. The district court in M.H. repeatedly quoted to our language in Gagliardo that a state administrative finding does not merit deference unless it is “reasoned and supported by the record,” 489 F.3d at 114. See, e.g., M.H., 712 F.Supp.2d at 154, 157, 161, 163. The magistrate judge in M.S., by contrast, articulated a highly restricted standard of review, relying in particular on Grim to decide that “as long a[s] the DOE is able to produce an expert to support its position at a hearing and receives a positive determination by at least one of the administrative officers, the DOE’s position is nearly assured victory in the federal courts.” R & R at 37. The Supreme Court has only considered the standard of review in these circumstances once. In Rowley, the district court had held, contrary to New York school administrative officers whose decisions it was reviewing, that the child, a deaf student, had not been provided with a FAPE. Rowley v. Bd. of Educ. of Hendrick Hudson Cent. Sch. Dist., 483 F.Supp. 528, 529 (S.D.N.Y.1980). According to the district court, the school district had not given the student “an opportunity to achieve [her] full potential commensurate with the opportunity provided to other children.” Id. at 534. The Court of Appeals affir