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        <OtherExpendituresAmt>501464</OtherExpendituresAmt>
        <EndYearBalanceAmt>29317648</EndYearBalanceAmt>
      </CYMinus4YrEndwmtFundGrp>
      <BoardDesignatedBalanceEOYPct>0.29510</BoardDesignatedBalanceEOYPct>
      <PrmnntEndowmentBalanceEOYPct>0.62380</PrmnntEndowmentBalanceEOYPct>
      <TermEndowmentBalanceEOYPct>0.08110</TermEndowmentBalanceEOYPct>
      <EndowmentsHeldUnrelatedOrgInd>0</EndowmentsHeldUnrelatedOrgInd>
      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
      <LandGrp>
        <OtherCostOrOtherBasisAmt>3247658</OtherCostOrOtherBasisAmt>
        <BookValueAmt>3247658</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>47355288</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>23277196</DepreciationAmt>
        <BookValueAmt>24078092</BookValueAmt>
      </BuildingsGrp>
      <LeaseholdImprovementsGrp>
        <OtherCostOrOtherBasisAmt>9348193</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>8290525</DepreciationAmt>
        <BookValueAmt>1057668</BookValueAmt>
      </LeaseholdImprovementsGrp>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>3398865</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>3047327</DepreciationAmt>
        <BookValueAmt>351538</BookValueAmt>
      </EquipmentGrp>
      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>4606821</OtherCostOrOtherBasisAmt>
        <BookValueAmt>4606821</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>33341777</TotalBookValueLandBuildingsAmt>
      <OtherSecuritiesGrp>
        <Desc>LOW VOLUME HEDGE FUNDS</Desc>
        <BookValueAmt>4196530</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
      </OtherSecuritiesGrp>
      <OtherSecuritiesGrp>
        <Desc>GROWTH HEDGE FUNDS</Desc>
        <BookValueAmt>4457483</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
      </OtherSecuritiesGrp>
      <OtherSecuritiesGrp>
        <Desc>PRIVATE EQUITY FUNDS</Desc>
        <BookValueAmt>6897605</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
      </OtherSecuritiesGrp>
      <OtherSecuritiesGrp>
        <Desc>PRIVATE REAL ESTATE FUNDS</Desc>
        <BookValueAmt>571734</BookValueAmt>
        <MethodValuationCd>F</MethodValuationCd>
      </OtherSecuritiesGrp>
      <TotalBookValueSecuritiesAmt>16123352</TotalBookValueSecuritiesAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>19771190</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>-1181691</NetUnrealizedGainsInvstAmt>
      <RevenueNotReportedAmt>-1181691</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>20952881</RevenueSubtotalAmt>
      <OtherRevenuesNotIncludedAmt>8570490</OtherRevenuesNotIncludedAmt>
      <RevenueNotReportedFinclStmtAmt>8570490</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>29523371</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>21995743</TotExpnsEtcAuditedFinclStmtAmt>
      <ExpensesNotReportedAmt>0</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>21995743</ExpensesSubtotalAmt>
      <OtherExpensesNotIncludedAmt>5178216</OtherExpensesNotIncludedAmt>
      <ExpensesNotRptFinclStmtAmt>5178216</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>27173959</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>TOWER HILL SCHOOL ASSOCIATION'S VARIOUS INDIVIDUAL ENDOWMENT FUNDS WERE CREATED BY DONORS TO SUPPLEMENT FUNDING IN PERPETUITY FOR EDUCATIONAL PROGRAMS, SCHOOL OPERATIONS, SCHOLARSHIPS, FACULTY COMPENSATION AND FORUMS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ASSOCIATION IS EXEMPT FROM INCOME TAXES UNDER SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE ("CODE"). U.S. GAAP REQUIRES MANAGEMENT TO EVALUATE TAX POSITIONS TAKEN AND RECOGNIZE A TAX LIABILITY IF THE ASSOCIATION HAS TAKEN AN UNCERTAIN POSITION THAT MORE LIKELY THAN NOT WOULD NOT BE SUSTAINED UPON EXAMINATION BY A GOVERNMENT AUTHORITY. MANAGEMENT HAS ANALYZED THE TAX POSITIONS TAKEN BY THE ASSOCIATION, AND HAS CONCLUDED THAT AS OF JUNE 30, 2020 AND 2019, THERE ARE NO UNCERTAIN POSITIONS TAKEN OR EXPECTED TO BE TAKEN THAT WOULD REQUIRE RECOGNITION OF A LIABILITY OR DISCLOSURE IN THE FINANCIAL STATEMENTS. THE ASSOCIATION RECOGNIZES ACCRUED INTEREST AND PENALTIES ASSOCIATED WITH UNCERTAIN TAX POSITIONS, IF ANY. THERE WERE NO INCOME TAX RELATED INTEREST OR PENALTIES RECORDED FOR EACH OF THE YEARS ENDED JUNE 30, 2020 OR 2019.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 4B - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>FINANCIAL ASSISTANCE, REMISSION AND MERIT-BASED AWARDS 5,178,216. RESTRICTED CONTRIBUTIONS 3,957,022. INVESTMENT INCOME, NET OF BOARD DESIGNATED APPROPRIATIONS -564,748.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 4B - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>FINANCIAL ASSISTANCE, REMISSION AND MERIT-BASED AWARDS 5,178,216.</ExplanationTxt>
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    </IRS990ScheduleD>
    <IRS990ScheduleE documentId="RetDoc1040400001">
      <NondiscriminatoryPolicyStmtInd>1</NondiscriminatoryPolicyStmtInd>
      <PolicyStmtInBrochuresEtcInd>1</PolicyStmtInBrochuresEtcInd>
      <PlcyPblczdViaBroadcastMediaInd>1</PlcyPblczdViaBroadcastMediaInd>
      <MaintainRacialCompRecsInd>1</MaintainRacialCompRecsInd>
      <MaintainScholarshipsRecsInd>1</MaintainScholarshipsRecsInd>
      <MaintainCpyOfBrochuresEtcInd>1</MaintainCpyOfBrochuresEtcInd>
      <MaintainCpyOfAllSolInd>1</MaintainCpyOfAllSolInd>
      <DiscriminateRaceStdntsRghtsInd>0</DiscriminateRaceStdntsRghtsInd>
      <DiscriminateRaceAdmissPlcyInd>0</DiscriminateRaceAdmissPlcyInd>
      <DiscriminateRaceEmplmFcultyInd>0</DiscriminateRaceEmplmFcultyInd>
      <DiscriminateRaceSchsInd>0</DiscriminateRaceSchsInd>
      <DiscriminateRaceEducPlcyInd>0</DiscriminateRaceEducPlcyInd>
      <DiscriminateRaceUseOfFcltsInd>0</DiscriminateRaceUseOfFcltsInd>
      <DiscriminateRaceAthltProgInd>0</DiscriminateRaceAthltProgInd>
      <DiscriminateRaceOtherActyInd>0</DiscriminateRaceOtherActyInd>
      <GovernmentFinancialAidRcvdInd>0</GovernmentFinancialAidRcvdInd>
      <GovernmentFinancialAidRvkdInd>0</GovernmentFinancialAidRvkdInd>
      <ComplianceWithRevProc7550Ind>1</ComplianceWithRevProc7550Ind>
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        <FormAndLineReferenceDesc>SCHEDULE E, PART I, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SCHOOL'S DIVERSITY POLICIES ARE CONTAINED IN VARIOUS MEDIA NOTICES WHICH INCLUDE, BUT ARE NOT LIMITED TO, THE TOWER HILL GUIDE BOOK AND APPLICATION FORM PROVIDED TO PROSPECTIVE FAMILIES, THE TOWER HILL WEBSITE AND THROUGH OUR MEMBERSHIP IN THE ASSOCIATION OF DELAWARE VALLEY INDEPENDENT SCHOOLS (ADVIS). OUR NONDISCRIMINATION POLICY ALSO ACCOMPANIES ALL JOB VACANCY ADVERTISEMENTS.</ExplanationTxt>
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        <RegionTxt>CARIBBEAN</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>INVESTMENTS</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>10269532</RegionTotalExpendituresAmt>
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      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>SCOTLAND</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>INVESTMENTS</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>235104</RegionTotalExpendituresAmt>
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      <SubtotalOfficesCnt>0</SubtotalOfficesCnt>
      <SubtotalEmployeesCnt>0</SubtotalEmployeesCnt>
      <ContinuationTotalOfficeCnt>0</ContinuationTotalOfficeCnt>
      <ContinuationTotalEmployeeCnt>0</ContinuationTotalEmployeeCnt>
      <TotalOfficeCnt>0</TotalOfficeCnt>
      <TotalEmployeeCnt>0</TotalEmployeeCnt>
      <SubtotalSpentAmt>10504636</SubtotalSpentAmt>
      <ContinuationSpentAmt>0</ContinuationSpentAmt>
      <TotalSpentAmt>10504636</TotalSpentAmt>
      <TransferToForeignCorpInd>0</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>0</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>0</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>0</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>0</ForeignPartnershipInd>
      <BoycottCountriesInd>0</BoycottCountriesInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III ACCOUNTING METHOD:</FormAndLineReferenceDesc>
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      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>FINANCIAL ASSISTANCE, TUITION REMISSION AND MERIT-BASED AWARDS</GrantTypeTxt>
        <RecipientCnt>334</RecipientCnt>
        <CashGrantAmt>5178216</CashGrantAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SCHOOL AWARDS SCHOLARSHIPS TO STUDENTS BASED MERIT OR DEMONSTRATED FINANCIAL NEED. PARTIAL TUITION REMISSION IS ALSO GRANTED TO CHILDREN OF FACULTY AND STAFF.</ExplanationTxt>
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      <TravelForCompanionsInd>X</TravelForCompanionsInd>
      <IdemnificationGrossUpPmtsInd>X</IdemnificationGrossUpPmtsInd>
      <DiscretionarySpendingAcctInd>X</DiscretionarySpendingAcctInd>
      <HousingAllowanceOrResidenceInd>X</HousingAllowanceOrResidenceInd>
      <ClubDuesOrFeesInd>X</ClubDuesOrFeesInd>
      <PersonalServicesInd>X</PersonalServicesInd>
      <WrittenPolicyRefTAndEExpnssInd>1</WrittenPolicyRefTAndEExpnssInd>
      <SubstantiationRequiredInd>1</SubstantiationRequiredInd>
      <CompensationCommitteeInd>X</CompensationCommitteeInd>
      <Form990OfOtherOrganizationsInd>X</Form990OfOtherOrganizationsInd>
      <WrittenEmploymentContractInd>X</WrittenEmploymentContractInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>1</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>0</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>0</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>0</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>0</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>0</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ELIZABETH SPEERS</PersonNm>
        <TitleTxt>HEAD OF SCHOOL</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>2838</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>19000</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>16380</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>507250</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ERIC NORMAN</PersonNm>
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        <BonusFilingOrganizationAmount>8500</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>1736</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>12851</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>16380</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>218046</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ANTHONY PISAPIA</PersonNm>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>369</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>12800</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>16380</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>212399</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>KRISTIN MUMFORD</PersonNm>
        <TitleTxt>DIRECTOR OF ADMISSIONS/ADVANCEMENT</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>6500</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>343</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>11367</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
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        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>196975</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>SETH KUSHKIN</PersonNm>
        <TitleTxt>DIRECTOR OF ATHLETICS</TitleTxt>
        <BaseCompensationFilingOrgAmt>130941</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>594</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>9166</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>16380</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>157081</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 4B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SCHOOL ESTABLISHED A NON-QUALIFIED RETIREMENT PLAN UNDER INTERNAL REVENUE CODE SECTION 457(B) AS A BENEFIT FOR ITS HEAD OF SCHOOL. THE SCHOOL CONTRIBUTED $18,000 TO THIS PLAN DURING THE FISCAL YEAR.</ExplanationTxt>
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        <TypeOfAssistanceTxt>FINANCIAL AID</TypeOfAssistanceTxt>
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      <GrntAsstBnftInterestedPrsnGrp>
        <CashGrantAmt>306570</CashGrantAmt>
        <TypeOfAssistanceTxt>TUITION REMISSION</TypeOfAssistanceTxt>
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    </IRS990ScheduleL>
    <IRS990ScheduleM documentId="RetDoc1042900001">
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        <MethodOfDeterminingRevenuesTxt>HI/LOW DATE OF GIFT</MethodOfDeterminingRevenuesTxt>
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      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>MISCELLANEOUS ITEMS</Desc>
        <ContributionCnt>0</ContributionCnt>
        <NoncashContributionsRptF990Amt>14655</NoncashContributionsRptF990Amt>
      </OtherNonCashContriTableGrp>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>0</ReviewProcessUnusualNCGiftsInd>
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    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>FORM 990 IS REVIEWED AND APPROVED BY THE HEAD OF SCHOOL AND THE AUDIT COMMITTEE. PRIOR TO FILING, THE FINAL DRAFT OF THE FORM 990 IS MADE AVAILABLE TO THE BOARD OF TRUSTEES FOR THEIR REVIEW.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>TRUSTEES ARE REQUIRED ANNUALLY TO SIGN CONFLICT OF INTEREST STATEMENTS AND DISCLOSE ANY KNOWN OR POTENTIAL CONFLICTS OF INTEREST IN THESE STATEMENTS AND AS THEY ARISE THROUGHOUT THE YEAR.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>EACH YEAR, THE COMPENSATION COMMITTEE OF THE BOARD CONDUCTS A BENCHMARK ANALYSIS TO EVALUATE ALL COMPONENTS OF THE HEAD OF SCHOOL'S COMPENSATION PACKAGE, INCLUDING BASE SALARY, SCHOOL-WIDE BENEFITS, DEFERRED COMPENSATION, OTHER COMPENSATION, HOUSING, EXCESS REMISSION, AND VEHICLE USAGE. THE BENCHMARK GROUP INCLUDES TOWER HILL SCHOOL AND 38 OTHER SIMILARLY-SITUATED SCHOOLS IN THE US. THE COMPENSATION COMMITTEE DOCUMENTS THE MEETING, INCLUDING A FULL LIST OF THOSE PRESENT AND THEIR INDEPENDENCE, AND THE PROCESS USED TO CONDUCT THEIR REVIEW. THE COMMITTEE THEN PRESENTS THEIR RECOMMENDATION TO THE FULL BOARD FOR REVIEW.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>GOVERNING DOCUMENTS, FINANCIAL STATEMENTS AND FORM 990 ARE HELD WITH THE SCHOOL AND MAY BE MADE AVAILABLE UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE AUDIT COMMITTEE IS RESPONSIBLE FOR THE OVERSIGHT OF THE AUDIT AND SELECTION OF THE INDEPENDENT ACCOUNTANT. THIS PROCESS REMAINS UNCHANGED FROM THE PRIOR YEAR.</ExplanationTxt>
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  </ReturnData>
</Return>