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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>MIKE VORIS</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
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        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>NICK FREEMAN</PersonNm>
        <TitleTxt>VICE CHAIR</TitleTxt>
        <AverageHoursPerWeekRt>1.50</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>NII AMAAH K OFOSU-AMAAH</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHoursPerWeekRt>1.50</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>PETER VENTIMIGLIA</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHoursPerWeekRt>1.50</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>TED LAMADE</PersonNm>
        <TitleTxt>TRUSTEE</TitleTxt>
        <AverageHoursPerWeekRt>1.50</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>14</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>BENJAMIN THOMAS</PersonNm>
        <TitleTxt>CFO/COO (AS OF 07/01/2024)</TitleTxt>
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        <OfficerInd>X</OfficerInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>48543</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>STEVE KING</PersonNm>
        <TitleTxt>OUTGOING INTERIM CFO</TitleTxt>
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        <ReportableCompFromOrgAmt>104593</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>5400</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>PETER GALLO</PersonNm>
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        <AverageHoursPerWeekRt>60.00</AverageHoursPerWeekRt>
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        <ReportableCompFromOrgAmt>246358</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>71570</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>KATHERINE HARVEY</PersonNm>
        <TitleTxt>DIR. OF ADMISSIONS/OUTREACH/ENROLL.</TitleTxt>
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        <KeyEmployeeInd>X</KeyEmployeeInd>
        <ReportableCompFromOrgAmt>171310</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>5198</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>EHREN FEDEROWICZ</PersonNm>
        <TitleTxt>HEAD OF UPPER SCHOOL</TitleTxt>
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        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>151208</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>75714</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>TARA MONTAGUE</PersonNm>
        <TitleTxt>ASSISTANT HEAD OF SCHOOL</TitleTxt>
        <AverageHoursPerWeekRt>60.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>177359</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>48775</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>FRED HALLER</PersonNm>
        <TitleTxt>CHIEF TECHNOLOGY OFFICER</TitleTxt>
        <AverageHoursPerWeekRt>60.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>166738</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>15215</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>WILLIAM BRADY</PersonNm>
        <TitleTxt>DIRECTOR OF ATHLETICS</TitleTxt>
        <AverageHoursPerWeekRt>60.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>152360</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>58829</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>ERIN DUFFY</PersonNm>
        <TitleTxt>HEAD OF MIDDLE SCHOOL</TitleTxt>
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        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>153163</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>67993</OtherCompensationAmt>
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      <TotalReportableCompFromOrgAmt>2046076</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>481196</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>63</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>1</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>WILLIAMS &amp; CONNOLLY LLP</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>680 MAINE AVE SW</AddressLine1Txt>
            <CityNm>WASHINGTON</CityNm>
            <StateAbbreviationCd>DC</StateAbbreviationCd>
            <ZIPCd>20024</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>LEGAL SERVICES</ServicesDesc>
        <CompensationAmt>607267</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>SIMPLY FRESH EVENTS LLC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>7621 RICKENBACKER DRIVE SUITE 500</AddressLine1Txt>
            <CityNm>GAITHERSBURG</CityNm>
            <StateAbbreviationCd>MD</StateAbbreviationCd>
            <ZIPCd>20879</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>EVENT PLANNING SERVICES</ServicesDesc>
        <CompensationAmt>427063</CompensationAmt>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>MARQUEZ TREE SERVICES LLC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1 MILL ST</AddressLine1Txt>
            <CityNm>PITTSTOWN</CityNm>
            <StateAbbreviationCd>NJ</StateAbbreviationCd>
            <ZIPCd>08867</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>LANDSCAPING SERVICES</ServicesDesc>
        <CompensationAmt>225471</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>RJM BUSINESS SERVICES LLC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>330 CHANGEBRIDGE RD</AddressLine1Txt>
            <CityNm>PINE BROOK</CityNm>
            <StateAbbreviationCd>NJ</StateAbbreviationCd>
            <ZIPCd>07058</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>CONSULTING SERVICES</ServicesDesc>
        <CompensationAmt>164048</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>ARC ENVIRONMENTAL LLC</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>1311 HAUBERT ST</AddressLine1Txt>
            <CityNm>BALTIMORE</CityNm>
            <StateAbbreviationCd>MD</StateAbbreviationCd>
            <ZIPCd>21230</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>PROFESSIONAL SERVICES</ServicesDesc>
        <CompensationAmt>155000</CompensationAmt>
      </ContractorCompensationGrp>
      <CntrctRcvdGreaterThan100KCnt>6</CntrctRcvdGreaterThan100KCnt>
      <FundraisingAmt>224575</FundraisingAmt>
      <AllOtherContributionsAmt>4582449</AllOtherContributionsAmt>
      <NoncashContributionsAmt>1183561</NoncashContributionsAmt>
      <TotalContributionsAmt>4807024</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>TUITION &amp; FEES</Desc>
        <BusinessCd>611110</BusinessCd>
        <TotalRevenueColumnAmt>37057869</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>37057869</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>AUXILIARY SERVICES</Desc>
        <BusinessCd>611710</BusinessCd>
        <TotalRevenueColumnAmt>3179172</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>3179172</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <TotalProgramServiceRevenueAmt>40237041</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>789032</TotalRevenueColumnAmt>
        <ExclusionAmt>789032</ExclusionAmt>
      </InvestmentIncomeGrp>
      <GrossRentsGrp>
        <RealAmt>516731</RealAmt>
      </GrossRentsGrp>
      <LessRentalExpensesGrp>
        <RealAmt>0</RealAmt>
      </LessRentalExpensesGrp>
      <RentalIncomeOrLossGrp>
        <RealAmt>516731</RealAmt>
      </RentalIncomeOrLossGrp>
      <NetRentalIncomeOrLossGrp>
        <TotalRevenueColumnAmt>516731</TotalRevenueColumnAmt>
        <UnrelatedBusinessRevenueAmt>45307</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>471424</ExclusionAmt>
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      <GrossAmountSalesAssetsGrp>
        <SecuritiesAmt>561845</SecuritiesAmt>
      </GrossAmountSalesAssetsGrp>
      <LessCostOthBasisSalesExpnssGrp>
        <SecuritiesAmt>62755</SecuritiesAmt>
      </LessCostOthBasisSalesExpnssGrp>
      <GainOrLossGrp>
        <SecuritiesAmt>499090</SecuritiesAmt>
      </GainOrLossGrp>
      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>499090</TotalRevenueColumnAmt>
        <ExclusionAmt>499090</ExclusionAmt>
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      <FundraisingGrossIncomeAmt>300533</FundraisingGrossIncomeAmt>
      <ContriRptFundraisingEventAmt>224575</ContriRptFundraisingEventAmt>
      <FundraisingDirectExpensesAmt>242371</FundraisingDirectExpensesAmt>
      <NetIncmFromFundraisingEvtGrp>
        <TotalRevenueColumnAmt>58162</TotalRevenueColumnAmt>
        <ExclusionAmt>58162</ExclusionAmt>
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      <GrossSalesOfInventoryAmt>349308</GrossSalesOfInventoryAmt>
      <CostOfGoodsSoldAmt>187821</CostOfGoodsSoldAmt>
      <NetIncomeOrLossGrp>
        <TotalRevenueColumnAmt>161487</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>161487</RelatedOrExemptFuncIncomeAmt>
      </NetIncomeOrLossGrp>
      <MiscellaneousRevenueGrp>
        <TotalRevenueColumnAmt>151518</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>151518</RelatedOrExemptFuncIncomeAmt>
      </MiscellaneousRevenueGrp>
      <OtherRevenueTotalAmt>151518</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>47220085</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>40550046</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>45307</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>1817708</ExclusionAmt>
      </TotalRevenueGrp>
      <GrantsToDomesticIndividualsGrp>
        <TotalAmt>7024526</TotalAmt>
        <ProgramServicesAmt>7024526</ProgramServicesAmt>
      </GrantsToDomesticIndividualsGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>1551552</TotalAmt>
        <ProgramServicesAmt>1314155</ProgramServicesAmt>
        <ManagementAndGeneralAmt>172899</ManagementAndGeneralAmt>
        <FundraisingAmt>64498</FundraisingAmt>
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      <OtherSalariesAndWagesGrp>
        <TotalAmt>17899639</TotalAmt>
        <ProgramServicesAmt>15144344</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2004443</ManagementAndGeneralAmt>
        <FundraisingAmt>750852</FundraisingAmt>
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      <PensionPlanContributionsGrp>
        <TotalAmt>925905</TotalAmt>
        <ProgramServicesAmt>793676</ProgramServicesAmt>
        <ManagementAndGeneralAmt>97598</ManagementAndGeneralAmt>
        <FundraisingAmt>34631</FundraisingAmt>
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      <OtherEmployeeBenefitsGrp>
        <TotalAmt>2099443</TotalAmt>
        <ProgramServicesAmt>1799621</ProgramServicesAmt>
        <ManagementAndGeneralAmt>221298</ManagementAndGeneralAmt>
        <FundraisingAmt>78524</FundraisingAmt>
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      <PayrollTaxesGrp>
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        <ProgramServicesAmt>1206574</ProgramServicesAmt>
        <ManagementAndGeneralAmt>148371</ManagementAndGeneralAmt>
        <FundraisingAmt>52647</FundraisingAmt>
      </PayrollTaxesGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>409456</TotalAmt>
        <ManagementAndGeneralAmt>409456</ManagementAndGeneralAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>56700</TotalAmt>
        <ManagementAndGeneralAmt>56700</ManagementAndGeneralAmt>
      </FeesForServicesAccountingGrp>
      <FeesForServicesProfFundraising>
        <TotalAmt>35000</TotalAmt>
        <FundraisingAmt>35000</FundraisingAmt>
      </FeesForServicesProfFundraising>
      <FeesForSrvcInvstMgmntFeesGrp>
        <TotalAmt>66179</TotalAmt>
        <ManagementAndGeneralAmt>66179</ManagementAndGeneralAmt>
      </FeesForSrvcInvstMgmntFeesGrp>
      <FeesForServicesOtherGrp>
        <TotalAmt>1069275</TotalAmt>
        <ProgramServicesAmt>192051</ProgramServicesAmt>
        <ManagementAndGeneralAmt>877224</ManagementAndGeneralAmt>
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      <AdvertisingGrp>
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        <ProgramServicesAmt>63320</ProgramServicesAmt>
        <ManagementAndGeneralAmt>100997</ManagementAndGeneralAmt>
        <FundraisingAmt>10700</FundraisingAmt>
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      <OfficeExpensesGrp>
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        <ProgramServicesAmt>480592</ProgramServicesAmt>
        <ManagementAndGeneralAmt>377228</ManagementAndGeneralAmt>
        <FundraisingAmt>47424</FundraisingAmt>
      </OfficeExpensesGrp>
      <OccupancyGrp>
        <TotalAmt>1303455</TotalAmt>
        <ProgramServicesAmt>1303455</ProgramServicesAmt>
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      <TravelGrp>
        <TotalAmt>1079566</TotalAmt>
        <ProgramServicesAmt>958342</ProgramServicesAmt>
        <ManagementAndGeneralAmt>22319</ManagementAndGeneralAmt>
        <FundraisingAmt>98905</FundraisingAmt>
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      <InterestGrp>
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        <ProgramServicesAmt>147510</ProgramServicesAmt>
        <ManagementAndGeneralAmt>384060</ManagementAndGeneralAmt>
        <FundraisingAmt>49006</FundraisingAmt>
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        <ProgramServicesAmt>2705085</ProgramServicesAmt>
        <ManagementAndGeneralAmt>403473</ManagementAndGeneralAmt>
        <FundraisingAmt>140013</FundraisingAmt>
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      <InsuranceGrp>
        <TotalAmt>291288</TotalAmt>
        <ManagementAndGeneralAmt>291288</ManagementAndGeneralAmt>
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        <Desc>FOOD SERVICES</Desc>
        <TotalAmt>1361845</TotalAmt>
        <ProgramServicesAmt>6311</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1355534</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
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        <TotalAmt>987356</TotalAmt>
        <ProgramServicesAmt>976422</ProgramServicesAmt>
        <ManagementAndGeneralAmt>10934</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
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        <TotalAmt>893092</TotalAmt>
        <ProgramServicesAmt>890895</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2197</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
        <Desc>SUMMER CAMP</Desc>
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        <ProgramServicesAmt>525430</ProgramServicesAmt>
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      <AllOtherExpensesGrp>
        <TotalAmt>1269319</TotalAmt>
        <ProgramServicesAmt>549506</ProgramServicesAmt>
        <ManagementAndGeneralAmt>354494</ManagementAndGeneralAmt>
        <FundraisingAmt>365319</FundraisingAmt>
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      <TotalFunctionalExpensesGrp>
        <TotalAmt>45166026</TotalAmt>
        <ProgramServicesAmt>36081815</ProgramServicesAmt>
        <ManagementAndGeneralAmt>7356692</ManagementAndGeneralAmt>
        <FundraisingAmt>1727519</FundraisingAmt>
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      <CashNonInterestBearingGrp>
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        <EOYAmt>307</EOYAmt>
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      <SavingsAndTempCashInvstGrp>
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        <EOYAmt>22307856</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <PledgesAndGrantsReceivableGrp>
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        <EOYAmt>4393116</EOYAmt>
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      <AccountsReceivableGrp>
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        <EOYAmt>528838</EOYAmt>
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      <OthNotesLoansReceivableNetGrp>
        <BOYAmt>230017</BOYAmt>
        <EOYAmt>234617</EOYAmt>
      </OthNotesLoansReceivableNetGrp>
      <InventoriesForSaleOrUseGrp>
        <BOYAmt>90206</BOYAmt>
        <EOYAmt>78362</EOYAmt>
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      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>671648</BOYAmt>
        <EOYAmt>658152</EOYAmt>
      </PrepaidExpensesDefrdChargesGrp>
      <LandBldgEquipCostOrOtherBssAmt>159120866</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>58672238</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>91471508</BOYAmt>
        <EOYAmt>100448628</EOYAmt>
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      <InvestmentsPubTradedSecGrp>
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        <EOYAmt>32597103</EOYAmt>
      </InvestmentsPubTradedSecGrp>
      <InvestmentsOtherSecuritiesGrp>
        <BOYAmt>239218</BOYAmt>
        <EOYAmt>269628</EOYAmt>
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      <TotalAssetsGrp>
        <BOYAmt>143946361</BOYAmt>
        <EOYAmt>161516607</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>7248198</BOYAmt>
        <EOYAmt>2034803</EOYAmt>
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      <DeferredRevenueGrp>
        <BOYAmt>9297071</BOYAmt>
        <EOYAmt>14542181</EOYAmt>
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      <TaxExemptBondLiabilitiesGrp>
        <BOYAmt>52820797</BOYAmt>
        <EOYAmt>65390869</EOYAmt>
      </TaxExemptBondLiabilitiesGrp>
      <MortgNotesPyblScrdInvstPropGrp>
        <BOYAmt>811519</BOYAmt>
        <EOYAmt>789329</EOYAmt>
      </MortgNotesPyblScrdInvstPropGrp>
      <OtherLiabilitiesGrp>
        <BOYAmt>240110</BOYAmt>
        <EOYAmt>168657</EOYAmt>
      </OtherLiabilitiesGrp>
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        <ExplanationTxt>THE DRAW FROM ENDOWMENT IS USED TO SUPPORT GENERAL PROGRAM SERVICES AS WELL AS FOR DESIGNATED PURPOSES, INCLUDING SCHOLARSHIPS, ETHICS FORUMS AND OTHER PROGRAMS (COMMUNITY SERVICE, ACADEMICS, ATHLETICS).</ExplanationTxt>
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        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
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        <TotalCompensationFilingOrgAmt>226922</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>TARA MONTAGUE</PersonNm>
        <TitleTxt>ASSISTANT HEAD OF SCHOOL</TitleTxt>
        <BaseCompensationFilingOrgAmt>175500</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>500</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>1359</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>8775</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>40000</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>226134</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>ERIN DUFFY</PersonNm>
        <TitleTxt>HEAD OF MIDDLE SCHOOL</TitleTxt>
        <BaseCompensationFilingOrgAmt>152235</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>928</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>7886</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>60107</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>221156</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>WILLIAM BRADY</PersonNm>
        <TitleTxt>DIRECTOR OF ATHLETICS</TitleTxt>
        <BaseCompensationFilingOrgAmt>150637</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>500</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>1223</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>9330</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>49499</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>211189</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>FRED HALLER</PersonNm>
        <TitleTxt>CHIEF TECHNOLOGY OFFICER</TitleTxt>
        <BaseCompensationFilingOrgAmt>164904</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>500</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>1334</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>14850</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>365</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>181953</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>KATHERINE HARVEY</PersonNm>
        <TitleTxt>DIR. OF ADMISSIONS/OUTREACH/ENROLL.</TitleTxt>
        <BaseCompensationFilingOrgAmt>169125</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>2185</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>5198</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>176508</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 1A</FormAndLineReferenceDesc>
        <ExplanationTxt>TAX GROSS-UP PAYMENTS WERE MADE FOR VARIOUS TAXABLE BENEFITS PROVIDED TO THE HEAD OF SCHOOL. THE HEAD OF SCHOOL HOLDS VARIOUS BUSINESS MEETINGS THROUGHOUT THE YEAR IN HIS RESIDENCE AND THEREFORE, RECEIVES PERSONAL SERVICES TO MAINTAIN THE UPKEEP OF THE RESIDENCE FOR BUSINESS PURPOSES. THESE AMOUNTS ARE TREATED AS NONTAXABLE BENEFITS AND INCLUDED IN PART II COL D. A NON-TAXABLE HOUSING BENEFIT WAS PROVIDED TO INDIVIDUALS AS A CONDITION OF EMPLOYMENT AND FOR THE CONVENIENCE OF THE EMPLOYER. THE FOLLOWING INDIVIDUALS RECEIVED THE HOUSING BENEFIT: BENJAMIN THOMAS - $40,000 JAMES NEILL - $40,000 PETER GALLO - $40,000 EHREN FEDEROWICZ- $40,000 TARA MONTAGUE - $40,000 ERIN DUFFY - $40,000 WILLIAM BRADY - $40,000</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 4B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE HEAD OF SCHOOL PARTICIPATED IN A 457F PLAN AND RECEIVED A CONTRIBUTION OF $60,469.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleK documentId="RetDoc1053100001">
      <TaxExemptBondsIssuesGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <IssuerName>
          <BusinessNameLine1Txt>MHHEFA SERIES 2022A &amp; 2022B</BusinessNameLine1Txt>
        </IssuerName>
        <BondIssuerEIN>520936091</BondIssuerEIN>
        <BondIssuedDt>2022-03-03</BondIssuedDt>
        <IssuePriceAmt>66000000</IssuePriceAmt>
        <PurposeDesc>SEE SCHEDULE K, PART VI</PurposeDesc>
        <DefeasedInd>1</DefeasedInd>
        <OnBehalfOfIssuerInd>1</OnBehalfOfIssuerInd>
        <PoolFinancingInd>0</PoolFinancingInd>
      </TaxExemptBondsIssuesGrp>
      <TaxExemptBondsProceedsGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <RetiredAmt>278776</RetiredAmt>
        <TotalProceedsAmt>66000000</TotalProceedsAmt>
        <IssuanceCostsFromProceedsAmt>50001</IssuanceCostsFromProceedsAmt>
        <CapitalExpendituresAmt>62231213</CapitalExpendituresAmt>
        <OtherSpentProceedsAmt>3718785</OtherSpentProceedsAmt>
        <SubstantialCompletionYr>2025</SubstantialCompletionYr>
        <RefundingTaxExemptBondsInd>1</RefundingTaxExemptBondsInd>
        <RefundingTaxableBondsInd>1</RefundingTaxableBondsInd>
        <FinalAllocationMadeInd>0</FinalAllocationMadeInd>
        <AdequateBooksAndRecMaintInd>1</AdequateBooksAndRecMaintInd>
      </TaxExemptBondsProceedsGrp>
      <TaxExemptBondsPrivateBusUseGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <OwningBondFinancedPropertyInd>0</OwningBondFinancedPropertyInd>
        <AnyLeaseArrangementsInd>0</AnyLeaseArrangementsInd>
        <MgmtContractBondFincdPropInd>0</MgmtContractBondFincdPropInd>
        <AnyResearchAgreementsInd>0</AnyResearchAgreementsInd>
        <PrivateBusUseByOthersPct>0.00000</PrivateBusUseByOthersPct>
        <PrivateBusConcerningUBIPct>0.00000</PrivateBusConcerningUBIPct>
        <TotalPrivateBusinessUsePct>0.00000</TotalPrivateBusinessUsePct>
        <BondIssMeetPrvtSecPymtTestInd>0</BondIssMeetPrvtSecPymtTestInd>
        <ChangeInUseBondFinancedPropInd>0</ChangeInUseBondFinancedPropInd>
        <ProcsNonqualifiedBondRemdtdInd>1</ProcsNonqualifiedBondRemdtdInd>
      </TaxExemptBondsPrivateBusUseGrp>
      <TaxExemptBondsArbitrageGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <Form8038TFiledInd>0</Form8038TFiledInd>
        <RebateNotDueYetInd>1</RebateNotDueYetInd>
        <ExceptionToRebateInd>0</ExceptionToRebateInd>
        <NoRebateDueInd>0</NoRebateDueInd>
        <VariableRateIssueInd>0</VariableRateIssueInd>
        <HedgeIdentifiedInBksAndRecInd>0</HedgeIdentifiedInBksAndRecInd>
        <GrossProceedsInvestedInGICInd>0</GrossProceedsInvestedInGICInd>
        <GrossProceedsInvestedInd>0</GrossProceedsInvestedInd>
        <WrittenProcToMonitorReqsInd>1</WrittenProcToMonitorReqsInd>
      </TaxExemptBondsArbitrageGrp>
      <ProceduresCorrectiveActionGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <ProceduresCorrectiveActionInd>1</ProceduresCorrectiveActionInd>
      </ProceduresCorrectiveActionGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE K, PART I, LINE A, COLUMN (F) - (I)</FormAndLineReferenceDesc>
        <ExplanationTxt>PART I BOND ISSUE CONSISTS OF: (1) 2022 BOND A - REFINANCE 2011 BOND DEBT AND PROVIDE FIXED FINANCING FOR MASTER PLAN CONSTRUCTION. DEBT UP TO $46,000,000. INTEREST ONLY UNTIL APRIL 2025. COL (G) DEFEASED - YES; COL (H) ON BEHALF OF ISSUER - YES; COL (I) POOLED FINANCING - NO. (2) 2022 BOND B - PROVIDE BRIDGE FINANCING FOR MASTER PLAN CONSTRUCTION PLEDGE RECEIVABLES PAYMENTS. DEBT UP TO $20,000,000. PRINCIPAL DUE AT MATURITY (2032) EXCEPT FOR REQUIRED PREPAYMENTS WITH THE PROCEEDS OF CERTAIN CAPITAL CAMPAIGN PLEDGES. COL (G) DEFEASED - NO; COL (H) ON BEHALF OF ISSUER - NO; COL (I) POOLED FINANCING - NO.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleK>
    <IRS990ScheduleM documentId="RetDoc1042900001">
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>32</ContributionCnt>
        <NoncashContributionsRptF990Amt>1183561</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>1</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>0</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, COLUMN (B):</FormAndLineReferenceDesc>
        <ExplanationTxt>THE NUMBER IN COLUMN (B) OF PART I REPRESENTS THE NUMBER OF CONTRIBUTORS.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 IS PREPARED BY THE OUTSIDE ACCOUNTING FIRM ENGAGED BY THE SCHOOL. THE RETURN IS REVIEWED BY THE PRESIDENT/HEAD OF SCHOOL, CFO, CONTROLLER, AND AUDIT AND RISK MANAGEMENT COMMITTEE BEFORE APPROVAL BY THE AUDIT AND RISK MANAGEMENT COMMITTEE AND MADE AVAILABLE TO THE TRUSTEES VIA A SECURE WEBSITE PORTAL PRIOR TO FILING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CONFLICT OF INTEREST POLICY IS POSTED TO THE BOARD'S SECURE WEBSITE PORTAL. TRUSTEES ARE ASKED TO READ AND SIGN THE POLICY AT THE BEGINNING OF EACH YEAR AND ADVISE THE SECRETARY OF ANY ISSUES THAT MIGHT BE OF CONCERN.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SALARIES OF THE OFFICERS ARE DECIDED BY THE USE OF COMPARABLE SALARY DATA AS PROVIDED BY AISGW AND THE ASSOCIATION OF MARYLAND INDEPENDENT SCHOOLS. IN ADDITION, THE HEAD OF SCHOOL'S COMPENSATION WAS SUBJECT TO APPROVAL BY THE BOARD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SCHOOL MAKES ITS GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>