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      <Desc>Tuition and fees - Offer an Early Childhood education program (Pre-Nursery to Pre-K) and K-12 college preparatory curriculum with campuses in East Hampton and Bridgehampton, New York. Ross also has a boarding program for grades 6-12. For the fiscal year 2021, approximately 380 students were enrolled.</Desc>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Andrea O'Hearn</PersonNm>
        <TitleTxt>Head of School for Adv. &amp; Ops</TitleTxt>
        <AverageHoursPerWeekRt>50.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>170396</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Steven O'Brien</PersonNm>
        <TitleTxt>Director of Facilities</TitleTxt>
        <AverageHoursPerWeekRt>50.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>128370</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>24854</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Junellen Tiska</PersonNm>
        <TitleTxt>Director of Academics</TitleTxt>
        <AverageHoursPerWeekRt>50.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>119145</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>24854</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Christopher Engel</PersonNm>
        <TitleTxt>Dir. of Comm. Prog./Dean of Students</TitleTxt>
        <AverageHoursPerWeekRt>50.00</AverageHoursPerWeekRt>
        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>111157</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>21957</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>1046837</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>194640</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>10</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>1</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>Montauk Bus Inc</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>209 Wading River Road</AddressLine1Txt>
            <CityNm>Center Moriches</CityNm>
            <StateAbbreviationCd>NY</StateAbbreviationCd>
            <ZIPCd>11934</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Transportation Services</ServicesDesc>
        <CompensationAmt>220215</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>Pond View Services Inc</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>67A Main Street Suite 1</AddressLine1Txt>
            <CityNm>East Hampton</CityNm>
            <StateAbbreviationCd>NY</StateAbbreviationCd>
            <ZIPCd>11937</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Security Services</ServicesDesc>
        <CompensationAmt>205380</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>Arent Fox LLP</BusinessNameLine1Txt>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>PO Box 644672</AddressLine1Txt>
            <CityNm>Pittsburgh</CityNm>
            <StateAbbreviationCd>PA</StateAbbreviationCd>
            <ZIPCd>15264</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Legal Services</ServicesDesc>
        <CompensationAmt>109986</CompensationAmt>
      </ContractorCompensationGrp>
      <CntrctRcvdGreaterThan100KCnt>3</CntrctRcvdGreaterThan100KCnt>
      <GovernmentGrantsAmt>2543243</GovernmentGrantsAmt>
      <AllOtherContributionsAmt>494414</AllOtherContributionsAmt>
      <TotalContributionsAmt>3037657</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>Tuition and fees</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>17361964</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>17361964</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>Tennis center income</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>1639275</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>1503439</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>135836</UnrelatedBusinessRevenueAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>Summer camp income</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>1123600</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>1123600</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>Other school programs</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>565283</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>565283</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <TotalProgramServiceRevenueAmt>20690122</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>4267</TotalRevenueColumnAmt>
        <ExclusionAmt>4267</ExclusionAmt>
      </InvestmentIncomeGrp>
      <GrossAmountSalesAssetsGrp>
        <OtherAmt>1503345</OtherAmt>
      </GrossAmountSalesAssetsGrp>
      <LessCostOthBasisSalesExpnssGrp>
        <OtherAmt>1557786</OtherAmt>
      </LessCostOthBasisSalesExpnssGrp>
      <GainOrLossGrp>
        <OtherAmt>-54441</OtherAmt>
      </GainOrLossGrp>
      <NetGainOrLossInvestmentsGrp>
        <TotalRevenueColumnAmt>-54441</TotalRevenueColumnAmt>
        <ExclusionAmt>-54441</ExclusionAmt>
      </NetGainOrLossInvestmentsGrp>
      <MiscellaneousRevenueGrp>
        <TotalRevenueColumnAmt>25576</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>25576</RelatedOrExemptFuncIncomeAmt>
      </MiscellaneousRevenueGrp>
      <OtherRevenueTotalAmt>25576</OtherRevenueTotalAmt>
      <TotalRevenueGrp>
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        <RelatedOrExemptFuncIncomeAmt>20579862</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>135836</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>-50174</ExclusionAmt>
      </TotalRevenueGrp>
      <GrantsToDomesticIndividualsGrp>
        <TotalAmt>3307531</TotalAmt>
        <ProgramServicesAmt>3307531</ProgramServicesAmt>
      </GrantsToDomesticIndividualsGrp>
      <CompCurrentOfcrDirectorsGrp>
        <TotalAmt>544233</TotalAmt>
        <ProgramServicesAmt>493269</ProgramServicesAmt>
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      </CompCurrentOfcrDirectorsGrp>
      <OtherSalariesAndWagesGrp>
        <TotalAmt>9105016</TotalAmt>
        <ProgramServicesAmt>8256045</ProgramServicesAmt>
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        <FundraisingAmt>45388</FundraisingAmt>
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      <OtherEmployeeBenefitsGrp>
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        <ManagementAndGeneralAmt>88185</ManagementAndGeneralAmt>
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      <PayrollTaxesGrp>
        <TotalAmt>602430</TotalAmt>
        <ProgramServicesAmt>546016</ProgramServicesAmt>
        <ManagementAndGeneralAmt>53398</ManagementAndGeneralAmt>
        <FundraisingAmt>3016</FundraisingAmt>
      </PayrollTaxesGrp>
      <FeesForServicesLegalGrp>
        <TotalAmt>165296</TotalAmt>
        <ProgramServicesAmt>3376</ProgramServicesAmt>
        <ManagementAndGeneralAmt>161920</ManagementAndGeneralAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>84775</TotalAmt>
        <ManagementAndGeneralAmt>84775</ManagementAndGeneralAmt>
      </FeesForServicesAccountingGrp>
      <FeesForServicesOtherGrp>
        <TotalAmt>896857</TotalAmt>
        <ProgramServicesAmt>342341</ProgramServicesAmt>
        <ManagementAndGeneralAmt>544891</ManagementAndGeneralAmt>
        <FundraisingAmt>9625</FundraisingAmt>
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      <AdvertisingGrp>
        <TotalAmt>157628</TotalAmt>
        <ManagementAndGeneralAmt>157628</ManagementAndGeneralAmt>
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      <OfficeExpensesGrp>
        <TotalAmt>362754</TotalAmt>
        <ProgramServicesAmt>349648</ProgramServicesAmt>
        <ManagementAndGeneralAmt>12100</ManagementAndGeneralAmt>
        <FundraisingAmt>1006</FundraisingAmt>
      </OfficeExpensesGrp>
      <InformationTechnologyGrp>
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        <ProgramServicesAmt>123685</ProgramServicesAmt>
        <ManagementAndGeneralAmt>9466</ManagementAndGeneralAmt>
      </InformationTechnologyGrp>
      <OccupancyGrp>
        <TotalAmt>2922832</TotalAmt>
        <ProgramServicesAmt>2916755</ProgramServicesAmt>
        <ManagementAndGeneralAmt>5469</ManagementAndGeneralAmt>
        <FundraisingAmt>608</FundraisingAmt>
      </OccupancyGrp>
      <TravelGrp>
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        <ProgramServicesAmt>60111</ProgramServicesAmt>
        <ManagementAndGeneralAmt>56</ManagementAndGeneralAmt>
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      <ConferencesMeetingsGrp>
        <TotalAmt>16920</TotalAmt>
        <ProgramServicesAmt>16369</ProgramServicesAmt>
        <ManagementAndGeneralAmt>551</ManagementAndGeneralAmt>
      </ConferencesMeetingsGrp>
      <InterestGrp>
        <TotalAmt>560932</TotalAmt>
        <ProgramServicesAmt>114044</ProgramServicesAmt>
        <ManagementAndGeneralAmt>444354</ManagementAndGeneralAmt>
        <FundraisingAmt>2534</FundraisingAmt>
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      <DepreciationDepletionGrp>
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        <ProgramServicesAmt>7976595</ProgramServicesAmt>
        <ManagementAndGeneralAmt>216292</ManagementAndGeneralAmt>
        <FundraisingAmt>24032</FundraisingAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>471771</TotalAmt>
        <ProgramServicesAmt>443464</ProgramServicesAmt>
        <ManagementAndGeneralAmt>23589</ManagementAndGeneralAmt>
        <FundraisingAmt>4718</FundraisingAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>Bad Debt Expense</Desc>
        <TotalAmt>614672</TotalAmt>
        <ManagementAndGeneralAmt>614672</ManagementAndGeneralAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Repairs &amp; Maintenance</Desc>
        <TotalAmt>610316</TotalAmt>
        <ProgramServicesAmt>592256</ProgramServicesAmt>
        <ManagementAndGeneralAmt>15997</ManagementAndGeneralAmt>
        <FundraisingAmt>2063</FundraisingAmt>
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      <OtherExpensesGrp>
        <Desc>Food and Meals</Desc>
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        <ProgramServicesAmt>197209</ProgramServicesAmt>
        <ManagementAndGeneralAmt>95</ManagementAndGeneralAmt>
        <FundraisingAmt>90</FundraisingAmt>
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      <OtherExpensesGrp>
        <Desc>Dues and Memberships</Desc>
        <TotalAmt>93177</TotalAmt>
        <ProgramServicesAmt>69618</ProgramServicesAmt>
        <ManagementAndGeneralAmt>19791</ManagementAndGeneralAmt>
        <FundraisingAmt>3768</FundraisingAmt>
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      <AllOtherExpensesGrp>
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      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
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        <ProgramServicesAmt>26751249</ProgramServicesAmt>
        <ManagementAndGeneralAmt>3305506</ManagementAndGeneralAmt>
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      <CashNonInterestBearingGrp>
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        <EOYAmt>4314778</EOYAmt>
      </CashNonInterestBearingGrp>
      <SavingsAndTempCashInvstGrp>
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        <EOYAmt>5543781</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <PledgesAndGrantsReceivableGrp>
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        <EOYAmt>189250</EOYAmt>
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      <AccountsReceivableGrp>
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        <EOYAmt>242139</EOYAmt>
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      <ReceivablesFromOfficersEtcGrp>
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        <EOYAmt>72127</EOYAmt>
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      <PrepaidExpensesDefrdChargesGrp>
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        <EOYAmt>305446</EOYAmt>
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      <LandBldgEquipCostOrOtherBssAmt>178279589</LandBldgEquipCostOrOtherBssAmt>
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      <LandBldgEquipBasisNetGrp>
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        <EOYAmt>61844867</EOYAmt>
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      <InvestmentsOtherSecuritiesGrp>
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        <EOYAmt>296659</EOYAmt>
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      <OtherAssetsTotalGrp>
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        <EOYAmt>242100</EOYAmt>
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      <TotalAssetsGrp>
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        <EOYAmt>73051147</EOYAmt>
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      <AccountsPayableAccrExpnssGrp>
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        <EOYAmt>2014734</EOYAmt>
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      <DeferredRevenueGrp>
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        <EOYAmt>7457710</EOYAmt>
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      <LoansFromOfficersDirectorsGrp>
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        <EOYAmt>8172270</EOYAmt>
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      <MortgNotesPyblScrdInvstPropGrp>
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        <EOYAmt>1607366</EOYAmt>
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      <UnsecuredNotesLoansPayableGrp>
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      </UnsecuredNotesLoansPayableGrp>
      <OtherLiabilitiesGrp>
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        <EOYAmt>69643</EOYAmt>
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      <TotalLiabilitiesGrp>
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        <EOYAmt>19321723</EOYAmt>
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      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
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      <DonorRestrictionNetAssetsGrp>
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        <EOYAmt>2034905</EOYAmt>
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        <EOYAmt>53729424</EOYAmt>
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      <TotLiabNetAssetsFundBalanceGrp>
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        <EOYAmt>73051147</EOYAmt>
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      <ReconcilationRevenueExpnssAmt>-6459056</ReconcilationRevenueExpnssAmt>
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      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <ConsolidatedBasisFinclStmtInd>X</ConsolidatedBasisFinclStmtInd>
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    </IRS990>
    <IRS990ScheduleA documentId="RetDoc1039100001">
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        <CurrentTaxYearMinus1YearAmt>3354616</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>3037657</CurrentTaxYearAmt>
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        <CurrentTaxYearMinus1YearAmt>3354616</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>3037657</CurrentTaxYearAmt>
        <TotalAmt>22483062</TotalAmt>
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      <SubstantialContributorsTotAmt>8879778</SubstantialContributorsTotAmt>
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        <CurrentTaxYearMinus3YearsAmt>109597</CurrentTaxYearMinus3YearsAmt>
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        <CurrentTaxYearMinus1YearAmt>83705</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>4267</CurrentTaxYearAmt>
        <TotalAmt>462133</TotalAmt>
      </GrossInvestmentIncome170Grp>
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        <CurrentTaxYearAmt>25576</CurrentTaxYearAmt>
        <TotalAmt>98355</TotalAmt>
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      <GrossReceiptsRltdActivitiesAmt>131157227</GrossReceiptsRltdActivitiesAmt>
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      <PublicSupportPY170Pct>0.52250</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>Schedule A, Part II, Line 10, Explanation of Other Income:</FormAndLineReferenceDesc>
        <ExplanationTxt>Miscellaneous income - 2019 Amount: $ 72,779. 2020 Amount: $ 25,576.</ExplanationTxt>
      </Form990ScheduleAPartVIGrp>
      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>Schedule A, Part II:</FormAndLineReferenceDesc>
        <ExplanationTxt>The organization is a school as described under 170(b)(1)(A)(ii) and is not required to complete a public support schedule. Schedule A, Part II is completed to verify the School can qualify under public charity status section 170(b)(1)(A)(vi) and, therefore, qualifies to use the first listed special rule for Schedule B reporting.</ExplanationTxt>
      </Form990ScheduleAPartVIGrp>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="RetDoc1234500001">
      <ContributorInformationGrp>
        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <IRS990ScheduleD documentId="RetDoc1040000001">
      <CYEndwmtFundGrp>
        <BeginningYearBalanceAmt>446552</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>107</InvestmentEarningsOrLossesAmt>
        <EndYearBalanceAmt>446659</EndYearBalanceAmt>
      </CYEndwmtFundGrp>
      <CYMinus1YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>446361</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>191</InvestmentEarningsOrLossesAmt>
        <EndYearBalanceAmt>446552</EndYearBalanceAmt>
      </CYMinus1YrEndwmtFundGrp>
      <CYMinus2YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>196171</BeginningYearBalanceAmt>
        <ContributionsAmt>250000</ContributionsAmt>
        <InvestmentEarningsOrLossesAmt>190</InvestmentEarningsOrLossesAmt>
        <EndYearBalanceAmt>446361</EndYearBalanceAmt>
      </CYMinus2YrEndwmtFundGrp>
      <CYMinus3YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>195981</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>190</InvestmentEarningsOrLossesAmt>
        <EndYearBalanceAmt>196171</EndYearBalanceAmt>
      </CYMinus3YrEndwmtFundGrp>
      <CYMinus4YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>198384</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>190</InvestmentEarningsOrLossesAmt>
        <AdministrativeExpensesAmt>2593</AdministrativeExpensesAmt>
        <EndYearBalanceAmt>195981</EndYearBalanceAmt>
      </CYMinus4YrEndwmtFundGrp>
      <PrmnntEndowmentBalanceEOYPct>1.00000</PrmnntEndowmentBalanceEOYPct>
      <EndowmentsHeldUnrelatedOrgInd>0</EndowmentsHeldUnrelatedOrgInd>
      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
      <LandGrp>
        <OtherCostOrOtherBasisAmt>13409064</OtherCostOrOtherBasisAmt>
        <BookValueAmt>13409064</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>132184976</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>89479081</DepreciationAmt>
        <BookValueAmt>42705895</BookValueAmt>
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      <LeaseholdImprovementsGrp>
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        <BookValueAmt>459944</BookValueAmt>
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        <OtherCostOrOtherBasisAmt>13429115</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>13189258</DepreciationAmt>
        <BookValueAmt>239857</BookValueAmt>
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      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>17688489</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>12658382</DepreciationAmt>
        <BookValueAmt>5030107</BookValueAmt>
      </OtherLandBuildingsGrp>
      <TotalBookValueLandBuildingsAmt>61844867</TotalBookValueLandBuildingsAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>Capital lease obligation</Desc>
        <Amt>69643</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>69643</TotalLiabilityAmt>
      <TotalRevEtcAuditedFinclStmtAmt>20485984</TotalRevEtcAuditedFinclStmtAmt>
      <DonatedServicesAndUseFcltsAmt>90334</DonatedServicesAndUseFcltsAmt>
      <RevenueNotReportedAmt>90334</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>20395650</RevenueSubtotalAmt>
      <OtherRevenuesNotIncludedAmt>3307531</OtherRevenuesNotIncludedAmt>
      <RevenueNotReportedFinclStmtAmt>3307531</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>23703181</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>26945040</TotExpnsEtcAuditedFinclStmtAmt>
      <DonatedServicesUseFcltsAmt>90334</DonatedServicesUseFcltsAmt>
      <ExpensesNotReportedAmt>90334</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>26854706</ExpensesSubtotalAmt>
      <OtherExpensesNotIncludedAmt>3307531</OtherExpensesNotIncludedAmt>
      <ExpensesNotRptFinclStmtAmt>3307531</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>30162237</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part V, Line 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>Each fiscal year, the Institute is authorized to expend from the Scholarship Fund (endowment) an amount equal to four and one-half percent of the principal of the endowment as of the first business day of such year, or such other amount as shall be mutually agreed upon by the donor or the donor's designated representatives and the Ross School. The endowment payout shall be paid first from the income of the endowment and, if and to the extent that such income is insufficient, from the principal of the endowment. If the income of the endowment in any fiscal year exceeds the authorized payout amount for such year, the excess will be added to principal at the end of such fiscal year. The endowment payout for each fiscal year shall be used to award scholarships to help support the tuition of one or more students at the Institute entering the ninth grade who have exhibited a deep interest in or enjoyment of the arts and/or sciences, especially the environmental sciences, and who are eligible on a needs basis for financial aid at the Institute.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XI, Line 4b - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Scholarships and financial aid 3,307,531.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XII, Line 4b - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Scholarships and financial aid 3,307,531.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
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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>1</GovernmentFinancialAidRcvdInd>
      <GovernmentFinancialAidRvkdInd>0</GovernmentFinancialAidRvkdInd>
      <ComplianceWithRevProc7550Ind>1</ComplianceWithRevProc7550Ind>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule E, Part I, Line 3</FormAndLineReferenceDesc>
        <ExplanationTxt>The organization currently enrolls students of racial minority groups in meaningful numbers consistent with the publicity exception found in Rev. Proc. 75-50 section 4.03(2)(b).</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule E, Part I, Line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>The Institute received financial assistance from the Paycheck Protection Program as part of the CARES Act.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleE>
    <IRS990ScheduleI documentId="RetDoc1041900001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>Scholarships</GrantTypeTxt>
        <RecipientCnt>196</RecipientCnt>
        <CashGrantAmt>3281411</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>Summer Camp Financial Aid</GrantTypeTxt>
        <RecipientCnt>23</RecipientCnt>
        <CashGrantAmt>26120</CashGrantAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>The assistance provided by the Institute is in the form of academic scholarships to attend the Ross School and financial assistance to attend the summer camp program conducted by the Institute. Records are maintained documenting the participants who receive aid and the rationale for providing aid to each participant. No cash changes hands and funds are directly tied to student accounts.</ExplanationTxt>
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    </IRS990ScheduleI>
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      <HousingAllowanceOrResidenceInd>X</HousingAllowanceOrResidenceInd>
      <WrittenPolicyRefTAndEExpnssInd>1</WrittenPolicyRefTAndEExpnssInd>
      <SubstantiationRequiredInd>1</SubstantiationRequiredInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>0</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>0</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>0</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>0</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>0</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>William O'Hearn</PersonNm>
        <TitleTxt>Head of School &amp; Head of High School</TitleTxt>
        <BaseCompensationFilingOrgAmt>188517</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>762</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>90271</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>279550</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Andrea O'Hearn</PersonNm>
        <TitleTxt>Head of School for Adv. &amp; Ops</TitleTxt>
        <BaseCompensationFilingOrgAmt>170000</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>396</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>170396</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Jeanette Tyndall</PersonNm>
        <TitleTxt>Head of Lower &amp; Middle School</TitleTxt>
        <BaseCompensationFilingOrgAmt>156599</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>1236</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>0</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>157835</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Steven O'Brien</PersonNm>
        <TitleTxt>Director of Facilities</TitleTxt>
        <BaseCompensationFilingOrgAmt>128310</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>60</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>0</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>24854</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>153224</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 1a</FormAndLineReferenceDesc>
        <ExplanationTxt>Housing Allowance: As a condition of employment, and as a convenience to the Institute, the Head of School is provided a home near Ross Institute. The home is provided as a nontaxable benefit to the Head of School.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleL documentId="RetDoc1042800001">
      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>Courtney S Ross</PersonNm>
        <RelationshipWithOrgTxt>Founder/Sub. Contributor/Family member - N. Eloff, Pres. &amp; R. Eloff, Treas.</RelationshipWithOrgTxt>
        <LoanPurposeTxt>Operating line of credit</LoanPurposeTxt>
        <LoanToOrganizationInd>X</LoanToOrganizationInd>
        <OriginalPrincipalAmt>18206070</OriginalPrincipalAmt>
        <BalanceDueAmt>186441</BalanceDueAmt>
        <DefaultInd>0</DefaultInd>
        <BoardOrCommitteeApprovalInd>1</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>1</WrittenAgreementInd>
      </LoansBtwnOrgInterestedPrsnGrp>
      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>Courtney S Ross</PersonNm>
        <RelationshipWithOrgTxt>Founder/Sub. Contributor/Family member - N. Eloff, Pres. &amp; R. Eloff, Treas.</RelationshipWithOrgTxt>
        <LoanPurposeTxt>Receivable for costs incurred by Institute</LoanPurposeTxt>
        <LoanFromOrganizationInd>X</LoanFromOrganizationInd>
        <OriginalPrincipalAmt>23557</OriginalPrincipalAmt>
        <BalanceDueAmt>72127</BalanceDueAmt>
        <DefaultInd>0</DefaultInd>
        <BoardOrCommitteeApprovalInd>1</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>0</WrittenAgreementInd>
      </LoansBtwnOrgInterestedPrsnGrp>
      <LoansBtwnOrgInterestedPrsnGrp>
        <PersonNm>Courtney S Ross</PersonNm>
        <RelationshipWithOrgTxt>Founder/Sub. Contributor/Family member - N. Eloff, Pres. &amp; R. Eloff, Treas.</RelationshipWithOrgTxt>
        <LoanPurposeTxt>Promissory Note for paying BOA loan down on behalf of the Institute</LoanPurposeTxt>
        <LoanToOrganizationInd>X</LoanToOrganizationInd>
        <OriginalPrincipalAmt>3760460</OriginalPrincipalAmt>
        <BalanceDueAmt>7985829</BalanceDueAmt>
        <DefaultInd>0</DefaultInd>
        <BoardOrCommitteeApprovalInd>1</BoardOrCommitteeApprovalInd>
        <WrittenAgreementInd>1</WrittenAgreementInd>
      </LoansBtwnOrgInterestedPrsnGrp>
      <TotalBalanceDueAmt>8244397</TotalBalanceDueAmt>
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <BusinessName>
            <BusinessNameLine1Txt>Coldon Group</BusinessNameLine1Txt>
          </BusinessName>
        </NameOfInterested>
        <RelationshipDescriptionTxt>Organization owned greater than 35% by John Collier, Board member</RelationshipDescriptionTxt>
        <TransactionAmt>180000</TransactionAmt>
        <TransactionDesc>Consulting services</TransactionDesc>
        <SharingOfRevenuesInd>0</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 1</FormAndLineReferenceDesc>
        <ExplanationTxt>The Board of Trustees may, by resolution, designate five or more trustees (one of whom shall be the Chairperson of the Board of Trustees) to constitute an Executive Committee, and delegate to the Executive Committee any of the powers and authority of the Board of Trustees in the management of the business and affairs of the Corporation, except for: the amendment or repeal of Bylaws or the adoption of new Bylaws; the amendment or repeal of any resolution of the Board of Trustees that by its express terms is not so amendable or repealable; the filling of vacancies in the Board of Trustees or in any committee; the approval of any transaction in which a trustee or officer has an interest; and the granting of degrees or making removals from office.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>Nicole Ross Eloff, Trustee, President and Robert Eloff, Trustee, Treasurer - Family relationship</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Form 990 is prepared by an independent CPA firm. A preliminary draft of the organization's Form 990, including all required schedules, was provided to management. Management reviewed the draft Form 990 in detail, consulted with the organization's accountants and tax return preparers, and took all other measures necessary and appropriate to ensure that the final version of the Form 990 is complete and accurate to the best of their knowledge. A copy of the final version of the Form 990, including all required schedules, was provided to each member of the organization's Board of Trustees prior to filing with the IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Each director, principal officer, key employee, and member of a committee with governing board delegated powers signs a conflict of interest statement annually which is reviewed by the officers. Should any potential conflicts of interest be disclosed, the interested party would be asked to refrain from participation in any deliberation or decision with regard to matters affected by the relationship.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 15b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Compensation Committee approves the officers and key employees compensation by performing an analysis and utilizing appropriate data as to the comparability of the compensation. The approval process was documented in the minutes. Form 990, Part VI, Section B, Line 15a: The organization does not compensate the top management official. Therefore, this line was answered no in accordance with the instructions.</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>
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        <DisregardedEntityName>
          <BusinessNameLine1Txt>RSIL26 LLC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>18 Goodfriend Drive</AddressLine1Txt>
          <CityNm>East Hampton</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>11937</ZIPCd>
        </USAddress>
        <PrimaryActivitiesTxt>Real estate management</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>NY</LegalDomicileStateCd>
        <TotalIncomeAmt>0</TotalIncomeAmt>
        <EndOfYearAssetsAmt>0</EndOfYearAssetsAmt>
        <DirectControllingEntityName>
          <BusinessNameLine1Txt>Ross Institute</BusinessNameLine1Txt>
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      </IdDisregardedEntitiesGrp>
      <IdDisregardedEntitiesGrp>
        <DisregardedEntityName>
          <BusinessNameLine1Txt>Ross Digital Delivery LLC</BusinessNameLine1Txt>
        </DisregardedEntityName>
        <USAddress>
          <AddressLine1Txt>18 Goodfriend Drive</AddressLine1Txt>
          <CityNm>East Hampton</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>11937</ZIPCd>
        </USAddress>
        <PrimaryActivitiesTxt>Digital delivery of curriculum</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>NY</LegalDomicileStateCd>
        <TotalIncomeAmt>0</TotalIncomeAmt>
        <EndOfYearAssetsAmt>0</EndOfYearAssetsAmt>
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          <BusinessNameLine1Txt>Ross Institute</BusinessNameLine1Txt>
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