OPINION OF THE. COURT
MANSMANN, Circuit Judge.
Through the exercise in “cooperative federalism” which is the hallmark of the implementation of the Education of the Handicapped Act, 20 Ü.S.C. §§ 1400 et seq., now known as the Individuals with Disabilities Education Act, local school boards are mandated to provide a free, appropriate public education for handicapped children alongside their peers who are not so impaired. The Act authorizes federal assistance to states and localities for educational programs which confer an educational benefit on disabled students. The Bernardsville School District receives an allocation of funds under this Act and thus incurs the responsibility to confer an educational benefit on learning disabled students enrolled in a public school within its jurisdiction.
J.H., the child who is the subject at the heart of this case, was denied the benefit of a free appropriate public education throughout his several years as an elementary school student within the Bernardsville School District. Year after year the School District failed to design an Individualized Educational Program suitable to J.H.’s special needs, and failed to intervene responsibly in his quite apparent trend of academic and social deterioration. Observing their son’s educational predicament and dissatisfied with the school program in Bernardsville, J.H.’s parents unilaterally removed J.H. from the School District and enrolled him in a private out-of-state residential school, where J.H. improved significantly under a program responsive to his needs. More than two years later, J.H.’s parents sought reimbursement from the Ber-nardsville School District for tuition and expenses for J.H.’s private education. J.H.’s parents argued that Bernardsville was by law obliged to provide J.H. with a free appropriate public education, that it failed utterly in this regard, and that they were virtually forced to enroll J.H. in an out of district school in order to ensure him an appropriate educational benefit. The Act and the implementing regulations offer no guideline with regard to the timeliness of this claim for retroactive reimbursement.
We- must decide whether J.H.’s parents requested due process for their son within an appropriate time limitation. Notwithstanding an acknowledgement of good cause for the frustration of J.H.’s parents and the reasonableness of their educational decision, we conclude that the request for reimbursement for the first two years after J.H. was removed from Bernardsville and enrolled in a private institution was untimely. We will award reimbursement only for J.H.’s third year of private education and for partial attorney’s fees.
I.
J.H. entered the Bernardsville School District in September, 1980, after he had completed kindergarten at a parochial school and it had become apparent that his academic progress was not commensurate with the other children in his class. In the Bernards-ville School District, J.H. repeated kindergarten, at the end of which it was again apparent that J.H.’s academic skills were significantly deficient and that- he had not progressed much during the academic year. By November of academic year 1981-82,-while J.H. was in the first grade, J.H.’s parents still observed a lack of -progress in their son, and hired a private tutor for reading and math once a week. In January, 1982, a private learning consultant advised Mr. and Mrs. H. that J.H. required one-on-one academic assistance. In January, 1982, the Ber-nardsville School District, also well aware of J.H.’s academic difficulties, referred J.H. to their Child Study Team,1 and on April 8, [152]*1521982, classified J.H. as perceptually impaired. The District placed J.H. in a small resource room reading and math group, and mainstreamed J.H. for other subjects. J.H. also attended summer school in the Bernardsville school district after completing the first grade.
J.H. remained in resource room instruction in the Bernardsville school through the end of the third grade, showing very limited progress and great difficulty keeping academic pace with his peers. The Individualized Educational Program (IEP) reports created by the Bernardsville district for the years 1982-83, 1983-84 and 1984-85, as well as Bernardsville’s psychological evaluations of J.H., attest to J.H.’s lack of academic progress and a disturbing deterioration in his confidence, self-esteem and social interaction with peers. The district court found that academic frustration and social isolation marked J.H.’s education experience in Ber-nardsville.
As early as October of 1982, J.H.’s resource room teacher, Mrs. Garland, recorded Mrs. H.’s “persistent anxiety” regarding the efficacy of the IEP. Mr. Walter Mahler of the Bernardsville Child Study Team was also apprised in 1982 of an audiologieal evaluation and assessment of central auditory functioning performed by a private neurologist, which revealed that J.H. was experiencing significant difficulty with auditory figure-ground discrimination ability,2 auditory closure ability3 and appeared also to suffer with auditory memory deficits.4 A. 2126-2128. That report recommended optimal listening conditions for J.H. in order to enhance his academic development. The report recommended specifically a quiet learning room with few distractions, preferential seating in a classroom, eliciting frequent feedback from J.H., certain speech and common memory training techniques, and counseled against a phonetics approach to reading. Phonetics was nevertheless emphasized in J.H.’s IEPs for reading.5 Moreover, Mrs. H. testified before the administrative law judge that J.H.’s resource room was not reasonably free from background noise which could sabotage efforts to educate this attention deficit child.
In academic year 1986-87, at the end of J.H.’s sixth grade, his reading level, as measured by the Woodcock Johnson Psychoedu-cational Battery, had only progressed from I.0 in the first grade to 2.9. Notwithstanding J.H.’s lack of success in prior years, the IEP provided by the district for the 1987-88 school year, J.H.’s grade 7, was virtually identical to the prior unsuccessful IEPs. Dr. Howard Margolis, testifying as an expert on behalf of J.H. at trial, characterized J.H.’s placement as inappropriate and not reasonably calculated to confer educational benefit on J.H.
In September of 1987, J.H.’s parents unilaterally removed J.H. from the Bernards-ville school system and placed him at the Landmark School in Massachusetts, a residential school for handicapped children. J.H. attended school at Landmark for academic years 1987-88 through 1989-90, J.H.’s grades 7, 8 and 9. In December of 1987 and November of 1988, at the request of J.H.’s parents, the Bernardsville District conducted [153]*153educational assessments of J.H., but never approved J.H.’s placement at Landmark.
In September of 1989, after J.H. had been in attendance at Landmark for more than two years, the parents of J.H. petitioned for an administrative hearing concerning J.H.’s placement and program from September 1987 to his current situation, and sought retroactive reimbursement for J.H.’s out-of-district residential schooling at Landmark. The Board of Education denied J.H.’s parents’ request for reimbursement and defended their proposed IEP for academic year 1987-88. J.H.’s parents filed a new request for an administrative hearing on November 17, 1989.
Between November and December of 1989, the parties negotiated and reached various agreements, and the matter did not proceed to a hearing at that time. The parties agreed that Deputy Public Advocate for the State of New Jersey, David Harris, would provide a release for Bemardsville to obtain the current records of J.H., that J.H. would be evaluated by the Bemardsville Child Study Team on December 22, 1989, that in early January, 1990, the Bemardsville school psychologist would visit Landmark to observe and evaluate J.H., that a meeting would be held to discuss the recommendations of the Child Study Team and that, if necessary, due process procedures could be activated.
Pursuant to the agreement, the Child Study Team did conduct a reevaluation of J.H. in order to develop an appropriate IEP. On April 11, 1990, Lynn Caravello, Ed.D., Director of Special Services, advised J.H.’s parents that a new IEP had been developed for J.H. and recommended that J.H. be placed in the Bernards High School as a ninth grader eligible for part-time special education.
In May of 1990, J.H.’s parents removed J.H. from the eighth grade at Landmark and reenrolled him in the Bemardsville School. Bernards High School implemented the newly developed IEP for the balance of the 1989-90 school year, and appeared to be responsive to Dr. Margolis’ revisional recommendations for the 1990-91 academic year.
On September 4, 1990, Mr. H. authorized J.H.’s placement in Bernards High School conditioned upon pending agreement on the IEP, and “upon agreement by the Bernards-ville Board of Education that such placement [would] not thereby become the current educational placement of [J.H.] within the meaning of federal or state statutes and regulations pertaining to special education.” J.H. in fact completed the 1990-91 academic year as a tenth grader at Bernards High School.
On January 4,1991, J.H.’s parents through their attorney filed a request for due process and for the matter to be transmitted to the office of administrative law for trial. The petition contended that the Bemardsville Board of Education had offered an inappropriate program for J.H. through June of 1987, forcing J.H.’s parents to place J.H. at the Landmark School so as not to deprive him of his statutory right to a free appropriate public education. The petition alleged among other things that the IEPs prepared by the Board of Education prior to J.H.’s enrollment at Landmark did not comply with the requirements of New Jersey Administrative Code 6:28-3.6 in that they were not reasonably calculated to confer any educational benefit upon J.H., and did not contain specific or measurable goals or instructional objectives. The petition requested reimbursement for all monies expended on behalf of J.H. relative to his placement at the Landmark school commencing in the summer of 1987 through May of 1990. The matter was forwarded to the Office of Administrative Law on January 16, 1991, and hearings began on February 19, 1991.
On June 24, 1992, the administrative law judge decided the case against the Bernards-ville Board of Education, ordering reimbursement to the parents of J.H. for Landmark tuition expenses for the academic years 1987-88 through 1989-90, excluding the cost of J.H.’s room and board. Decision of Administrative Law Judge, OAL Dkt. No. EDS 576-91 (June 24, 1992), A. 24r-50. In pertinent part, the administrative law judge found:
The [IEPs] were not compliant with the New Jersey Administrative Code as it then existed and, did not enable J.H. to receive [154]*154either an appropriate education, or to best achieve educational success6 Specifically, J.H.’s IEP’s were severely lacking in adequate statements of current educational status, the annual goals were vague, nonspecific and incapable of being measured, and repeated themselves, for the most part, in each succeeding year.
The IEP’s ... did not enable J.H. to improve in any meaningful way in his reading. ...
Despite parental concern and intervention through regular contact and communication with the District and the hiring of tutors, J.H.’s lack of progress in reading caused him to suffer emotionally, and significantly affected his self-esteem.
As a result, J.H. had significant problems with his peers and socialization.... Although one-to-one instruction in reading was recommended by independent evaluations ... with little exception, the same was not offered to J.H.
The program offered to J.H for seventh grade ... was a continuation of prior programs which did not address J.H.’s handicapping condition.
Petitioners were justified in seeking a free, appropriate public education under the circumstances recognizing that J.H.’s reading handicap was not being addressed.
... [Petitioners [sic] decision to enroll [J.H. in the Landmark School] was reasonable.
The program at Landmark School was appropriate for J.H. to meet his needs, and offered the best opportunity to enable J.H. to achieve educational success and benefit from his education.
OAL Dkt. No. EDS 576-91, pp. 19-20; A. 42-43.
The Bernardsville Board of Education appealed the matter to the United States District Court for the District of New Jersey on September 2, 1993 pursuant to 20 U.S.C. § 1415(e)(2).7 Bernardsville Board of Education v. J.H., Civil No. 92-3694 (D.N.J. March 22, 1993). The parents of J.H. moved for summary judgment on the ground that the Board of Education’s appeal was untimely under 20 U.S.C. § 1415(e)(2). Following the opinion of this circuit in Tokarcik v. Forest Hills School District, 665 F.2d 443, 450-54 (3d Cir.1981) (30-day state limitation statute for state administrative appeals to state courts does not apply to federal claim brought in federal court under Education of Handicapped Act), cert. denied, 458 U.S. 1121, 102 S.Ct. 3508, 73 L.Ed.2d 1383 (1982), the district court dismissed J.H.’s parents’ summary judgment motion. The district court denied the Board of Education’s cross-motion for summary judgment brought on the ground that J.H.’s parents waived their right to reimbursement by unilaterally placing J.H. in Landmark and failing to initiate review proceedings prior to seeking reimbursement. The district court also denied the Board of Education’s alternative argu[155]*155ment for summary judgment that J.H.’s parents failed to comply with the 90-day statute of limitations contained in N.J.A.C. 6:24—
I.2(c), which the Board argued should be applied to challenges to IEPs. The court noted that the New Jersey Administrative Code does not contain any explicit time limitation within which a party must request a due process hearing in the special education context, and no caselaw has held that the 90-day time limit would be applicable.
Prior to trial, on September 9, 1998, the district court ruled on the parties’ motions in limine. J.H.’s parents had filed a motion seeking to limit the testimony of two expert witnesses for the Board of Education, Joanne Seelaus, school psychologist and Supervisor of Special Education, and Dr. Lynn Caravel-lo, Director of Special Services for the Ber-nardsville Board of Education. Seelaus and Caravello had prepared a joint report which contained references to the IEP prepared for J.H. for the 1987-88 school year, references to testimony previously given during the administrative hearing, and references to the reevaluation of J.H. preparatory to his return to the district in 1990. The court excluded these portions of their testimony on the ground that such evidence would have been cumulative and improper “additional evidence” pursuant to 20 U.S.C. § 1415(e)(2),8 and with regard to that portion of the report discussing J.H.’s anticipated return to Ber-nardsville in the fall of 1990, that it would have been irrelevant to the request for reimbursement for tuition from 1987 through the spring of 1990.
The district court also granted the Board of Education’s motion to preclude J.H.’s parents from testifying at the hearing about issues that they had already or could have addressed at the administrative proceeding.
The court ruled on the merits of the appeal on November 15, 1993, after conducting a de novo review of the state administrative decision. Affording the administrative law judge due deference in consideration of a perceived expertise on the part of the administrative agency to articulate state educational policy, and with respect to the administrative law judge’s credibility determinations, the district court concluded that the Bernardsville School District faded to confer upon J.H. even the minimally satisfactory educational benefit under the least stringent standard which could arguably have been applied. The district court concluded that the IEPs developed for J.H. during the relevant school years were not reasonably calculated to confer an educational benefit. After an independent examination of the record, the district court affirmed the administrative law judge’s specific findings, including that the IEPs did not contain adequate statements of current educational status or measurable annual goals, were virtually redundant from year to year and hence unresponsive to J.H.’s apparent difficulties, and that Bernardsville failed to offer J.H. adequate one-to-one instruction. The district court held that Bernardsville failed to sustain its burden of proof to show by a preponderance that its IEPs provided J.H. with a free, appropriate, public education, and further held that the Landmark placement was appropriate.
On equitable considerations and on the power conferred on the district court by 20 U.S.C. § 1415(e)(2) to “grant such relief as the court determines is appropriate,” the district court awarded J.H.’s parents retroactive reimbursement of Landmark School tuition, exclusive of room and board, for academic years 1987-88 through 1989-90, affirming the order of the administrative law judge. The court further designated J.H.’s parents as the prevailing party for purposes of awarding attorney’s fees and costs pursuant to 20 U.S.C. § 1415(e)(4)(B),9 but left open the determination of the specific calculation of rea[156]*156sonable fees. By order of the court on February 2, 1994, the award of attorney’s fees was set in the amount of $91,494.85.
Pursuant to 28 U.S.C. § 1291, on December 14,1993, the Bernardsville Board of Education timely appealed the final order of the district court of November 15, 1993, which affirmed the decision of the administrative law judge, and the February 2,1994, order of the district court awarding attorney’s fees.10 The Board of Education also appealed the two interlocutory opinions denying its motion for summary judgment and excluding the testimonies of two witnesses.
II.
Upon an examination of the record on appeal, we are confident that the district court properly ruled that, under any arguably appropriate legal standard, the Bernardsville Board of Education failed to establish by a preponderance that its program and placement for J.H. assured him a free, appropriate, public education as required under the Education of the Handicapped Act, 20 U.S.C. § 1412(l).11 The record bespeaks an appalling failure on the part of the education bureaucracy to develop and implement an appropriate IEP. We will not belabor this point. We turn our attention directly to the question of the timeliness of J.H.’s parents’ request for reimbursement.
A.
The Bernardsville Board of Education contends that J.H.’s parents’ more than two year delay in commencing the review process renders their claim ineligible for reimbursement for any portion of the private tuition in question. The Board cites a number of cases in which parents have been awarded prospective private school tuition and/or expenses incurred while a challenge to the student’s IEP was pending through administrative review to support its position that parents must commence the review process in order to be entitled to relief.12 See, e.g., School Commit[157]*157tee of Burlington v. Department of Education, 471 U.S. 359, 370, 105 S.Ct. 1996, 2003, 85 L.Ed.2d 385 (1985) (Act authorizes prospective injunction and reimbursement for appropriate unilateral private placement during interim pending review of public placement later adjudged inappropriate); Lascari v. Board of Education, 116 N.J. 30, 50, 560 A.2d 1180 (1989) (parents may be reimbursed for private school tuition during pendency of any proceeding which determines that the district’s IEP was inappropriate); Garland Independent School Dist. v. Wilks, 657 F.Supp. 1163, 1167 (N.D.Tex.1987) (parent not entitled to tuition reimbursement incurred prior to bringing dissatisfaction with district’s IEP to school district’s attention); Lewisville Independent School District v. Brooke P., 16 EHLR 1313, 1315-16 (E.D.Tex.1990) (parents’ failure to request due process hearing constitutes waiver of right to reimbursement for cost of extended school year services prior to initiation of due process proceedings, but court ordered prospective injunction against school district); but cf. Northeast Central School Dist. v. Sobol, 170 A.D.2d 80, 85-87, 572 N.Y.S.2d 752, 755-57 (1991) (the ability to order retroactive reimbursement within the statutory context and public policy is necessary to ensure a child’s right to a free, appropriate, public education). Thus, Bernardsville argues that reimbursement for J.H.’s private placement prior to commencement of review proceedings is not warranted in this case, and that the district court erroneously denied the Board of Education’s motion for summary judgment.
J.H.’s parents assert that the easelaw in this area does not explicitly, or necessarily by inference, preclude pre-proceedings reimbursement; they argue that costs incurred subsequent to their expressions of dissatisfaction with J.H.’s IEP, before they officially commenced a review, should be reimbursed. J.H.’s parents informed the Board of Education of their concerns regarding J.H.’s program and placement in August of 1987 and requested placement at Landmark. The Board denied that request, but since at least that time the Board was arguably on effective notice of the IEP’s inadequacy and the Board’s potential liability to J.H.’s parents. Furthermore, the Board’s annual monitoring of J.H.’s program and progress while at Landmark served to keep the Board on notice for the duration of J.H.’s out-of-district enrollment.
J.H.’s parents’ argument is not without merit. The fact that here the regulations do not specify a time limitation within which to bring a due process hearing, as well as the very nature and social significance of the education of children with disabilities, incline us to equitable considerations. The fact that the school district was notified of the parents’ dissatisfaction, albeit not through the initiation of official proceedings, from the very first summer that J.H. attended Landmark, that the parents did request a new placement for J.H., and that there was continued contact between the school district and J.H. for the duration of J.H.’s enrollment at Landmark support Mr. and Mrs. H’s argument. There is no evidence whatsoever that J.H.’s parents acted in bad faith, and given the apparent severe deficiencies in the IEPs developed for J.H. at Bernardsville, it is clear that J.H.’s parents acted reasonably in securing an appropriate education for their son outside the district. At the time J.H. left Bernardsville, the IEP developed for him was both procedurally and substantively inadequate, and it is untenable for the school district to maintain the argument that it was not aware of a problem with the IEP it offered, virtually unmodified, to J.H. year after year despite his lack of academic progress, and in the face of his social regression. We do not hesitate to affirm the right to reimbursement for private tuition incurred from a unilateral enrollment during the pen-dency of any proceeding if it is ultimately determined that the IEP in question was inappropriate. See Burlington, 471 U.S. at 370,105 S.Ct. at 2003, and related cases cited above.
Nevertheless, here, where proceedings were initiated more than two years after J.H.’s transfer, we must place into our equation the practical opportunity afforded the school district to modify its IEP or to determine definitively whether expenditures occurred outside the district could have been obviated by the filing of a prompt complaint. [158]*158We are cognizant of the fact that the school district serves a very large student population, and in light of the numerous contacts it has with parents seeking the individual welfare of their respective children, mere notice of parental “dissatisfaction” does not alone put the Board on reasonable notice that the parents will challenge a particular IEP in the future and seek reimbursement for an interim unilateral placement in a private institution. Absent initiation of review proceedings within a reasonable time of a unilateral decision to transfer a child to a private institution, a school district would not know to continue to review and revise an IEP, and the court would be left to hazard conjecture or hypothesis as to what the Board of Education might have proposed if it had been informed of the parents’ continued intent to pursue an appropriate education for their child within the school district. We, of course, recognize that the school district has the duty in the first instance to provide an appropriate IEP, and moreover, to demonstrate by a preponderance at a due process hearing that the IEP it offered was indeed appropriate. With that foremost in mind, we must nevertheless also recognize that as a practical reality, and as a matter of procedural law13 of which J.H.’s parents were fully apprised, the right of review contains a corresponding parental duty to unequivocally place in issue the appropriateness of an IEP. This is accomplished through the initiation of review proceedings within a reasonable time of the unilateral placement for which reimbursement is sought. We think more than two years, indeed, more than one year, without mitigating excuse, is an unreasonable delay.14 We will vacate the district court’s November 15, 1993 order directing Ber-nardsville to reimburse Mr. & Mrs. H. for tuition at Landmark to the extent it covers [159]*159school years 1987-88 and 1988-89.15
B.
The issue of retroactive reimbursement for the school year 1989-90 requires closer scrutiny of the equities. At the beginning of the 1989-90 academic year, J.H.’s parents sought an administrative hearing regarding J.H.’s placement and began intensive negotiations with Bernardsville resulting in a reentry of J.H. in a newly developed IEP within the district shortly before that academic year expired. J.H.’s parents subsequently continued actively to pursue the review process, and ultimately requested a due process hearing for retroactive reimbursement in the middle of academic year 1990-91. Thus from the beginning of 1989-90, J.H.’s parents set in motion the firm steps which fairly notified the school board that retroactive liability was a possibility and afforded the board a fair opportunity to revise its IEP for J.H.
The Board of Education asserts that the district court was constrained to dismiss even the reimbursement request for 1989-90 as time-barred pursuant to the 90-day rule set forth in N.J.A.C. 6:24-1.2. That provision provides in relevant part:
(a) To initiate a contested case for the Commissioner’s determination of a controversy or dispute arising under the school laws, a petitioner shall serve a copy of a petition upon each respondent....
‡ ‡ ‡
(c) The petitioner shall file a petition no later than the 90th day from the date of receipt of the notice of a final order, ruling or other action by the district board of education, individual party, or agency, which is the subject of the requested contested case hearing.
The Board of Education cites a number of cases in which the 90-day rule has been applied in the education context. See North Plainfield Education Assoc. v. Board of Education, 96 N.J. 587, 594, 476 A.2d 1245 (1984) (because award of teacher salary scale increment is not statutory right, it is subject to 90-day time bar); Riely v. Board of Education, 173 N.J.Super. 109, 113-14, 413 A.2d 628 (App.Div.1980) (teacher’s petition of appeal with Commissioner of Education concerning reinstatement time-barred by 90-day rule, and pendency of arbitration does not relieve compliance with 90-day rule); Lombardi v. Board of Education, OAL Dkt. No. EDU 6808-86 (January 30, 1987) (Commissioner of Education); Markman v. Board of Education, OAL Dkt. No. EDU 0317-86 (August 22, 1986) (Commissioner of Education).
In addition to citing arguably supporting caselaw, the Board of Education contends that the scheme of the New Jersey Code also compels application of the 90-day rule. The Board cites N.J.A.C. 1:6 A-l.l, which provides:
The rules in this chapter shall apply to the notice and hearing of matters arising out of the Special Education Program of the Department of Education, pursuant to N.J.A.C. 6:28. Any aspect of notice and hearing not covered by these special rules shall be governed by the Uniform Administrative Procedure Rules (U.A.P.R.) contained in N.J.A.C. 1:1_
N.J.A.C. 1:1-31 provides:
A contested case shall be commenced in the State agency with appropriate subject matter jurisdiction. A contested case may be commenced by the agency itself or by an individual or entity as provided in the rules and regulations of the agency.
The appropriate state agency here is the Commissioner of Education. N.J.A.C. 6:24-
I.2 is the code provision which limits the time within which a parent may seek a hearing before an administrative law judge for the Commissioner of Education. Thus the Board argues that N.J.A.C. 6:24-1.2(c), which sets forth the 90-day rule, mandated that J.H.’s parents file a petition with the Commissioner within 90 days from receipt of the disputed IEP, and that their delay results in a time-bar from all relief.
We have already decided that a mere expression of dissatisfaction with a proposed [160]*160IEP and placement is not sufficient to guarantee retroactive reimbursement for the cost of a reasonable unilateral placement, even where the IEP is ultimately found to have been inappropriate. Even a liberal understanding of the operative policies of the IDEA cannot obviate the practical necessity for a reasonable timeframe for filing due process claims. Nevertheless, we find no precedent for applying the 90-day rule to special education matters, though undoubtedly that limitation applies to disputes arising under school laws other than special education matters. The district court accurately noted that the rules which expressly pertain to special education do not contain a time limit, and no caselaw has adopted the 90-day rule in the context of the IDEA. The district court correctly rejected the 90-day rule here.
Under the facts of this case in light of all the equities, recognizing the operative policies of the IDEA and acknowledging all relevant statutes and regulations, we believe that J.H.’s parents adequately placed in issue their dissatisfaction with J.H.’s IEP for purposes of reimbursement at the time they requested an administrative hearing in September of 1989. Due process procedures were not activated at that time only because the parties were attempting to negotiate a settlement. A formal request for due process was eventually made when it became apparent that a resolution could not otherwise be negotiated. Although we cannot award compensation for Bernardsville’s past failure to provide J.H. a free appropriate public education, we believe substantial justice can be achieved by awarding reimbursement for tuition costs incurred while in attendance at Landmark for the 1989-90 academic year. We will affirm the district court’s award of reimbursement tuition costs for the 1989-90 school year, excluding the costs associated with room and board.16
III.
In light of the IDEA, 20 U.S.C. § 1415(e)(4)(B), which provides that “the court, in its discretion, may award reasonable attorneys’ fees as part of the costs to the parents or guardian of a handicapped child or youth who is the prevailing party,” and consistent with our holding, we must vacate the district court’s February 2, 1994 order awarding full attorneys’ fees in the amount of $91,494.85. We find, however, that the district court was correct in its rejection of the Board of Education’s contention that the court should disallow those fees associated with J.H.’s parents’ motion for summary judgment pertaining to a statute of limitations issue on appeal. We find that counsel for J.H. has made “a good-faith effort to exclude from [the] fee request hours that are excessive, redundant, or otherwise unnecessary,” and has exercised sound billing judgment as required in Hensley v. Eckerhart, 461 U.S. 424, 434, 103 S.Ct. 1933, 1939-40, 76 L.Ed.2d 40 (1983) (citing Copeland v. Marshall, 641 F.2d 880, 891 (D.C.Cir.1980) (en banc)). We also find that the district court did not err in its acceptance of the $235 hourly billing rate charged by counsel for J.H. as reasonable in light of comparable prevailing rates.
Furthermore, we agree with the district court that the award of fees should not be reduced to reflect J.H.’s counsel’s partial success by virtue of the district court’s refusal to award reimbursement costs for room and board as requested. The issue of reimbursement for residential costs involved a “common core of facts” relative to the issue of tuition reimbursement, was based on “related legal theories,” and cannot be viewed as a discrete claim capable of disassociation from the tuition claim for purposes of awarding attorneys’ fees. Id. at 435,103 S.Ct. at 1940. Nevertheless, since J.H. has failed to prevail on his claim for reimbursement costs for [161]*161academic years 1987-88 and 1988-89, we must remand to the district court to calculate an appropriate reduced fee award to reflect the adjusted scope of J.H.’s success.
rv.
Lastly, the Board of Education argues that the district court erroneously excluded the testimonies of Dr. Lynn Caravello, the Director of Special Services at the time J.H. reentered the Bernardsville School District in 1990, and Ms. Joanne Seelaus, school psychologist, from the de novo hearing the district court held. The Board of Education sought to admit a joint report prepared by Dr. Caravello and Ms. Seelaus which included a reevaluation of J.H. in anticipation of his return and other information relevant to the 1990-91 IEP prepared for J.H.
During the prior administrative law hearing, the administrative law judge had excluded this report. Nevertheless, Ms. Seelaus had offered testimony at the hearing on the Board’s behalf exclusive of matters concerning J.H.’s post-reentry experience. Dr. Ca-ravello had also been present-and available to testify before the administrative law judge on June 4, 1991, although she did not testify.
At the district court hearing, the court excluded their testimony in part on the ground that the IEP subsequently developed for J.H. in 1990-91, which was not at issue in the present litigation, was irrelevant to the issue of the appropriateness of the public education offered to J.H. in the prior contested years. The district court further held that the testimony would be cumulative and would improperly embellish testimony previously given at the administrative hearing. Order of the District Court, Civ. No. 92-3694 (D.N.J. Sept. 9, 1993). See Burlington v. Department of Education, 736 F.2d 773, 790-91 (1st Cir.1984) (“additional evidence” under 20 U.S.C. § 1415(e)(2) “does not authorize witnesses at trial to repeat or embellish their prior administrative hearing testimony”; the trial court in its discretion must not allow “such evidence to change the character of the hearing from one of review to a trial de novo ”), aff'd, 471 U.S. 359, 105 S.Ct. 1996, 85 L.Ed.2d 385 (1985); Egg Harbor Township Board of Education v. S.O., by his Guardian ad litem, R.O., Civil Action No. 90-1043, slip op. at 3 n. 1 (D.N.J. Aug. 19,1992) (“additional evidence” under 20 U.S.C. § 1415(e)(2) should not be cumulative, introduced to impeach credibility of administrative hearing witnesses, nor embellish testimony from the administrative hearing, and should not have been available for proffer during the administrative hearing).
We do not find any error of law or abuse of discretion in the district court’s decision to exclude the joint report on J.H.’s parents’ motion in limine. The Bernardsville School District’s performance with regard to the IEP it developed for J.H. for the 1990-91 school year and for prospective years are not at issue here and admission of the joint report would not affect the disposition of this case.
V.
We will thus vacate that portion of the district court’s November 15, 1993 judgment which awards J.H.’s parents reimbursement for tuition at the Landmark School for the academic years 1987-88 and 1988-89, and we will affirm that portion which awards J.H.’s parents reimbursement for tuition at the Landmark School for academic year 1989-90. Although we agree with the district court’s designation of J.H.’s parents as a “prevailing party” pursuant to 20 U.S.C. § 1415(e)(4)(B), we will vacate the amount of attorneys’ fees set by the district court by order dated February 2, 1994, and remand to the district court for recalculation.