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        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MR HENRY MELLON</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>DR DAVID P ROSELLE</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MS CARMEN WALLACE</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MS GINA WARD</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MS MARNA WHITTINGTON</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MR Z VANCE WILSON</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>DR EARL J BALL III</PersonNm>
        <TitleTxt>TRUSTEE EMERITUS</TitleTxt>
        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>ELIZABETH SPEERS</PersonNm>
        <TitleTxt>HEAD OF SCHOOL</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>491328</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>106679</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>BIANCA WRIGHT</PersonNm>
        <TitleTxt>CFO</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>90641</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>33201</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>PAUL CAPODANNO</PersonNm>
        <TitleTxt>HEAD OF MIDDLE SCHOOL</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>108330</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>9480</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>THOMAS HOCH</PersonNm>
        <TitleTxt>CHAIR OF SCIENCE DEPARTMENT</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>101686</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>28913</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>SUSAN MILLER</PersonNm>
        <TitleTxt>HEAD OF LOWER SCHOOL</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>114273</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>37848</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>KRISTIN MUMFORD</PersonNm>
        <TitleTxt>DIRECTOR OF ADVANCEMENT</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>101967</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>67789</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>ANTHONY PISAPIA</PersonNm>
        <TitleTxt>CHIEF INFORMATION AND INNOVATION OFFICER</TitleTxt>
        <AverageHoursPerWeekRt>40.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>135938</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>69098</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>1144163</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>353008</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>6</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>1</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>CULINART GROUP</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>PO BOX 417632</AddressLine1Txt>
            <CityNm>BOSTON</CityNm>
            <StateAbbreviationCd>MA</StateAbbreviationCd>
            <ZIPCd>02241</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>CATERING/DINING SERVICE</ServicesDesc>
        <CompensationAmt>743791</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>WILCOX LANDSCAPING</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>PO BOX 629</AddressLine1Txt>
            <CityNm>NEW CASTLE</CityNm>
            <StateAbbreviationCd>DE</StateAbbreviationCd>
            <ZIPCd>19720</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>LANDSCAPER</ServicesDesc>
        <CompensationAmt>335510</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>FIRST CHOICE CLEANING SERVICE</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1722 NEWPORT GAP PIKE</AddressLine1Txt>
            <CityNm>WILMINGTON</CityNm>
            <StateAbbreviationCd>DE</StateAbbreviationCd>
            <ZIPCd>19808</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>CLEANING SERVICE</ServicesDesc>
        <CompensationAmt>315666</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>HUNT VALLEY CONTRACTORS</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>3705 CRONDALL LANE</AddressLine1Txt>
            <CityNm>OWINGS MILLS</CityNm>
            <StateAbbreviationCd>MD</StateAbbreviationCd>
            <ZIPCd>21117</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>DESIGN/BUILD CONTRACTOR</ServicesDesc>
        <CompensationAmt>164757</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>MODERN CONTROLS</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>7 BELLECOR DR</AddressLine1Txt>
            <CityNm>NEW CASTLE</CityNm>
            <StateAbbreviationCd>DE</StateAbbreviationCd>
            <ZIPCd>19720</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>EQUIPMENT SERVICE</ServicesDesc>
        <CompensationAmt>158945</CompensationAmt>
      </ContractorCompensationGrp>
      <CntrctRcvdGreaterThan100KCnt>8</CntrctRcvdGreaterThan100KCnt>
      <AllOtherContributionsAmt>3025156</AllOtherContributionsAmt>
      <NoncashContributionsAmt>371979</NoncashContributionsAmt>
      <TotalContributionsAmt>3025156</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>TUITION</Desc>
        <BusinessCd>611110</BusinessCd>
        <TotalRevenueColumnAmt>19522721</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>19522721</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>AFTER SCHOOL PROGRAM FEES</Desc>
        <BusinessCd>611110</BusinessCd>
        <TotalRevenueColumnAmt>333524</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>333524</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>SUMMER CAMP PROGRAM FEES</Desc>
        <BusinessCd>611110</BusinessCd>
        <TotalRevenueColumnAmt>152029</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>152029</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>FACILITIES RENTALS</Desc>
        <BusinessCd>611110</BusinessCd>
        <TotalRevenueColumnAmt>32245</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>32245</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <TotalProgramServiceRevenueAmt>20040519</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>593059</TotalRevenueColumnAmt>
        <ExclusionAmt>593059</ExclusionAmt>
      </InvestmentIncomeGrp>
      <GrossAmountSalesAssetsGrp>
        <SecuritiesAmt>2691395</SecuritiesAmt>
      </GrossAmountSalesAssetsGrp>
      <LessCostOthBasisSalesExpnssGrp>
        <SecuritiesAmt>1245627</SecuritiesAmt>
      </LessCostOthBasisSalesExpnssGrp>
      <GainOrLossGrp>
        <SecuritiesAmt>1445768</SecuritiesAmt>
      </GainOrLossGrp>
      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>1445768</TotalRevenueColumnAmt>
        <ExclusionAmt>1445768</ExclusionAmt>
      </NetGainOrLossInvestmentsGrp>
      <GrossSalesOfInventoryAmt>126500</GrossSalesOfInventoryAmt>
      <CostOfGoodsSoldAmt>83116</CostOfGoodsSoldAmt>
      <NetIncomeOrLossGrp>
        <TotalRevenueColumnAmt>43384</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>43384</RelatedOrExemptFuncIncomeAmt>
      </NetIncomeOrLossGrp>
      <OtherRevenueMiscGrp>
        <Desc>ANCILLARY INCOME, NET</Desc>
        <BusinessCd>611110</BusinessCd>
        <TotalRevenueColumnAmt>412960</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>412960</RelatedOrExemptFuncIncomeAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueMiscGrp>
        <Desc>MISCELLANEOUS</Desc>
        <BusinessCd>611110</BusinessCd>
        <TotalRevenueColumnAmt>112363</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>112363</RelatedOrExemptFuncIncomeAmt>
      </OtherRevenueMiscGrp>
      <OtherRevenueTotalAmt>525323</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>25673209</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>20609226</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>2038827</ExclusionAmt>
      </TotalRevenueGrp>
      <GrantsToDomesticIndividualsGrp>
        <TotalAmt>4296459</TotalAmt>
        <ProgramServicesAmt>4296459</ProgramServicesAmt>
      </GrantsToDomesticIndividualsGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>773860</TotalAmt>
        <ManagementAndGeneralAmt>773860</ManagementAndGeneralAmt>
      </CompCurrentOfcrDirectorsGrp>
      <OtherSalariesAndWagesGrp>
        <TotalAmt>9966693</TotalAmt>
        <ProgramServicesAmt>7543950</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2066269</ManagementAndGeneralAmt>
        <FundraisingAmt>356474</FundraisingAmt>
      </OtherSalariesAndWagesGrp>
      <PensionPlanContributionsGrp>
        <TotalAmt>668428</TotalAmt>
        <ProgramServicesAmt>503937</ProgramServicesAmt>
        <ManagementAndGeneralAmt>136495</ManagementAndGeneralAmt>
        <FundraisingAmt>27996</FundraisingAmt>
      </PensionPlanContributionsGrp>
      <OtherEmployeeBenefitsGrp>
        <TotalAmt>1376968</TotalAmt>
        <ProgramServicesAmt>1099453</ProgramServicesAmt>
        <ManagementAndGeneralAmt>222467</ManagementAndGeneralAmt>
        <FundraisingAmt>55048</FundraisingAmt>
      </OtherEmployeeBenefitsGrp>
      <PayrollTaxesGrp>
        <TotalAmt>728107</TotalAmt>
        <ProgramServicesAmt>524237</ProgramServicesAmt>
        <ManagementAndGeneralAmt>174746</ManagementAndGeneralAmt>
        <FundraisingAmt>29124</FundraisingAmt>
      </PayrollTaxesGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>63352</TotalAmt>
        <ProgramServicesAmt>37882</ProgramServicesAmt>
        <ManagementAndGeneralAmt>25470</ManagementAndGeneralAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>172079</TotalAmt>
        <ManagementAndGeneralAmt>172079</ManagementAndGeneralAmt>
      </FeesForServicesAccountingGrp>
      <FeesForSrvcInvstMgmntFeesGrp>
        <TotalAmt>194779</TotalAmt>
        <ManagementAndGeneralAmt>194779</ManagementAndGeneralAmt>
      </FeesForSrvcInvstMgmntFeesGrp>
      <FeesForServicesOtherGrp>
        <TotalAmt>527683</TotalAmt>
        <ProgramServicesAmt>297183</ProgramServicesAmt>
        <ManagementAndGeneralAmt>28531</ManagementAndGeneralAmt>
        <FundraisingAmt>201969</FundraisingAmt>
      </FeesForServicesOtherGrp>
      <AdvertisingGrp>
        <TotalAmt>200573</TotalAmt>
        <ProgramServicesAmt>81189</ProgramServicesAmt>
        <FundraisingAmt>119384</FundraisingAmt>
      </AdvertisingGrp>
      <InformationTechnologyGrp>
        <TotalAmt>329009</TotalAmt>
        <ProgramServicesAmt>316115</ProgramServicesAmt>
        <ManagementAndGeneralAmt>12269</ManagementAndGeneralAmt>
        <FundraisingAmt>625</FundraisingAmt>
      </InformationTechnologyGrp>
      <OccupancyGrp>
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        <ProgramServicesAmt>1219811</ProgramServicesAmt>
        <ManagementAndGeneralAmt>47344</ManagementAndGeneralAmt>
        <FundraisingAmt>2412</FundraisingAmt>
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      <TravelGrp>
        <TotalAmt>441647</TotalAmt>
        <ProgramServicesAmt>406783</ProgramServicesAmt>
        <ManagementAndGeneralAmt>28317</ManagementAndGeneralAmt>
        <FundraisingAmt>6547</FundraisingAmt>
      </TravelGrp>
      <DepreciationDepletionGrp>
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        <ProgramServicesAmt>1550116</ProgramServicesAmt>
        <ManagementAndGeneralAmt>60164</ManagementAndGeneralAmt>
        <FundraisingAmt>3065</FundraisingAmt>
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      <OtherExpensesGrp>
        <Desc>EVENTS</Desc>
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        <ProgramServicesAmt>758554</ProgramServicesAmt>
        <ManagementAndGeneralAmt>76936</ManagementAndGeneralAmt>
        <FundraisingAmt>69467</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>SUPPLIES AND MATERIALS</Desc>
        <TotalAmt>814278</TotalAmt>
        <ProgramServicesAmt>491193</ProgramServicesAmt>
        <ManagementAndGeneralAmt>315823</ManagementAndGeneralAmt>
        <FundraisingAmt>7262</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>FEES AND MISCELLANEOUS</Desc>
        <TotalAmt>479066</TotalAmt>
        <ProgramServicesAmt>334901</ProgramServicesAmt>
        <ManagementAndGeneralAmt>105556</ManagementAndGeneralAmt>
        <FundraisingAmt>38609</FundraisingAmt>
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      <TotalFunctionalExpensesGrp>
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        <ProgramServicesAmt>19461763</ProgramServicesAmt>
        <ManagementAndGeneralAmt>4441105</ManagementAndGeneralAmt>
        <FundraisingAmt>917982</FundraisingAmt>
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      <CashNonInterestBearingGrp>
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        <EOYAmt>3215257</EOYAmt>
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      <SavingsAndTempCashInvstGrp>
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      </SavingsAndTempCashInvstGrp>
      <OthNotesLoansReceivableNetGrp>
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        <EOYAmt>17034</EOYAmt>
      </OthNotesLoansReceivableNetGrp>
      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>111438</BOYAmt>
        <EOYAmt>262437</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>61283201</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>31638451</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>30501639</BOYAmt>
        <EOYAmt>29644750</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <InvestmentsPubTradedSecGrp>
        <BOYAmt>26762919</BOYAmt>
        <EOYAmt>28705505</EOYAmt>
      </InvestmentsPubTradedSecGrp>
      <InvestmentsOtherSecuritiesGrp>
        <BOYAmt>10856007</BOYAmt>
        <EOYAmt>12572054</EOYAmt>
      </InvestmentsOtherSecuritiesGrp>
      <TotalAssetsGrp>
        <BOYAmt>70748363</BOYAmt>
        <EOYAmt>74417037</EOYAmt>
      </TotalAssetsGrp>
      <DeferredRevenueGrp>
        <BOYAmt>5082285</BOYAmt>
        <EOYAmt>5921295</EOYAmt>
      </DeferredRevenueGrp>
      <OtherLiabilitiesGrp>
        <BOYAmt>58810</BOYAmt>
        <EOYAmt>55034</EOYAmt>
      </OtherLiabilitiesGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>5141095</BOYAmt>
        <EOYAmt>5976329</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsSFAS117Ind>X</OrganizationFollowsSFAS117Ind>
      <UnrestrictedNetAssetsGrp>
        <BOYAmt>40015929</BOYAmt>
        <EOYAmt>41737118</EOYAmt>
      </UnrestrictedNetAssetsGrp>
      <TemporarilyRstrNetAssetsGrp>
        <BOYAmt>2621131</BOYAmt>
        <EOYAmt>5001772</EOYAmt>
      </TemporarilyRstrNetAssetsGrp>
      <PermanentlyRstrNetAssetsGrp>
        <BOYAmt>22970208</BOYAmt>
        <EOYAmt>21701818</EOYAmt>
      </PermanentlyRstrNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>65607268</BOYAmt>
        <EOYAmt>68440708</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>70748363</BOYAmt>
        <EOYAmt>74417037</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>852359</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>1981081</NetUnrlzdGainsLossesInvstAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <InfoInScheduleOPartXIIInd>X</InfoInScheduleOPartXIIInd>
      <MethodOfAccountingOtherInd methodOfAccountingOtherDesc="MOD. CASH">X</MethodOfAccountingOtherInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleA documentId="RetDoc1039100001">
      <SchoolInd>X</SchoolInd>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="RetDoc1234500001" />
    <IRS990ScheduleD documentId="RetDoc1040000001">
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        <GrantsOrScholarshipsAmt>765574</GrantsOrScholarshipsAmt>
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      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
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        <BookValueAmt>3247658</BookValueAmt>
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        <OtherCostOrOtherBasisAmt>54594726</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>28667270</DepreciationAmt>
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        <BookValueAmt>302659</BookValueAmt>
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        <Desc>HEDGE FUNDS AND PRIVATE EQUITY INVESTMENTS</Desc>
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        <MethodValuationCd>F</MethodValuationCd>
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        <Desc>EMPLOYEE PAYROLL WITHHOLDINGS</Desc>
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      <FootnoteTextInd>X</FootnoteTextInd>
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      <OtherRevenueAmt>877146</OtherRevenueAmt>
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        <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, 2018 AND 2017, 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 WAS NO INCOME TAX RELATED INTEREST OR PENALTIES RECORDED FOR EACH OF THE YEARS ENDED JUNE 30, 2018 AND 2017.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>INVENTORY COGS 83,116. MODIFIED CASH BASIS ADJUSTMENT 794,030.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 4B - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>FINANCIAL ASSISTANCE, REMISSION AND MERIT-BASED AWARDS 4,296,459.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>INVENTORY COGS 83,116.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 4B - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>FINANCIAL ASSISTANCE, REMISSION AND MERIT-BASED AWARDS 4,296,459. MODIFIED CASH BASIS ADJUSTMENT 110,975.</ExplanationTxt>
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      <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>
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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 WITH ADVIS. OUR NONDISCRIMINATION POLICY ALSO ACCOMPANIES ALL JOB VACANCY ADVERTISEMENTS.</ExplanationTxt>
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        <RegionTxt>CARIBBEAN</RegionTxt>
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        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>INVESTMENTS</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>7986841</RegionTotalExpendituresAmt>
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        <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>
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        <PersonNm>ELIZABETH SPEERS</PersonNm>
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        <DeferredCompensationFlngOrgAmt>18884</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
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        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>598007</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>SUSAN MILLER</PersonNm>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>KRISTIN MUMFORD</PersonNm>
        <TitleTxt>DIRECTOR OF ADVANCEMENT</TitleTxt>
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        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
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        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
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        <TotalCompensationFilingOrgAmt>169756</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ANTHONY PISAPIA</PersonNm>
        <TitleTxt>CHIEF INFORMATION AND INNOVATION OFF</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>9440</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
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        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>205036</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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        <ContributionCnt>30</ContributionCnt>
        <NoncashContributionsRptF990Amt>351613</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>HI/LOW DATE OF GIFT</MethodOfDeterminingRevenuesTxt>
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        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>MISC IN-KIND GIFTS</Desc>
        <ContributionCnt>78</ContributionCnt>
        <NoncashContributionsRptF990Amt>15806</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>LIST PRICES/COMPARAB</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
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        <Desc>VARIOUS AUCTION ITEMS</Desc>
        <ContributionCnt>31</ContributionCnt>
        <NoncashContributionsRptF990Amt>4560</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>LIST PRICES/COMPARAB</MethodOfDeterminingRevenuesTxt>
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      <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 1</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SCHOOL'S POLICY IS TO USE A MODIFIED CASH BASIS OF ACCOUNTING. THE FOLLOWING AREAS HAVE BEEN ACCOUNTED FOR ON A STRICT CASH BASIS: - OPERATING EXPENDITURES - CAPITAL EXPENSES - CONTRIBUTIONS REVENUE - TUITION REVENUE - ALL OTHER MISCELLANEOUS REVENUE AND EXPENSES THE FOLLOWING AREAS HAVE BEEN ACCOUNTED FOR ON AN ACCRUAL BASIS: - TUITION PREPAYMENTS - EMPLOYEE LOANS - ANY BANK DEBTS - MISCELLANEOUS RESERVES AND STUDENT FUNDS</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>