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        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Richard G Woolworth Jr</PersonNm>
        <TitleTxt>Board Member</TitleTxt>
        <AverageHoursPerWeekRt>4</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>James H Higgins III</PersonNm>
        <TitleTxt>President</TitleTxt>
        <AverageHoursPerWeekRt>12</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Jonathan D Klein</PersonNm>
        <TitleTxt>Vice President</TitleTxt>
        <AverageHoursPerWeekRt>4</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>D D Willard Gardiner Jr</PersonNm>
        <TitleTxt>Treasurer</TitleTxt>
        <AverageHoursPerWeekRt>4</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Dr Lori D Hill</PersonNm>
        <TitleTxt>Secretary</TitleTxt>
        <AverageHoursPerWeekRt>4</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
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        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Richard B Commons</PersonNm>
        <TitleTxt>Headmaster</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
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        <OtherCompensationAmt>51924</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Temba Maqubela</PersonNm>
        <TitleTxt>Headmaster</TitleTxt>
        <AverageHoursPerWeekRt>60</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
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        <OfficerInd>X</OfficerInd>
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        <OtherCompensationAmt>86845</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>J Hale Smith</PersonNm>
        <TitleTxt>C.F.O.</TitleTxt>
        <AverageHoursPerWeekRt>60</AverageHoursPerWeekRt>
        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
        <OfficerInd>X</OfficerInd>
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        <OtherCompensationAmt>59390</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>John MacEachern</PersonNm>
        <TitleTxt>Director of Development</TitleTxt>
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        <AverageHoursPerWeekRltdOrgRt>0</AverageHoursPerWeekRltdOrgRt>
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        <OtherCompensationAmt>137373</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Ian Gracey</PersonNm>
        <TitleTxt>Director of Admissions</TitleTxt>
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        <OtherCompensationAmt>138305</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Katherine Bradley</PersonNm>
        <TitleTxt>Assistant Headmaster</TitleTxt>
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        <OtherCompensationAmt>71035</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Craig Gemmell</PersonNm>
        <TitleTxt>Director of College Counseling</TitleTxt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>John Amirault</PersonNm>
        <TitleTxt>Director of IT</TitleTxt>
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          <BusinessName>
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        </ContractorName>
        <ContractorAddress>
          <USAddress>
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            <City>Boston</City>
            <State>MA</State>
            <ZIPCode>02210</ZIPCode>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1>Shawmut Design &amp; Construction</BusinessNameLine1>
          </BusinessName>
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        <ContractorAddress>
          <USAddress>
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            <City>Boston</City>
            <State>MA</State>
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        </ContractorAddress>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1>Chartwells</BusinessNameLine1>
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        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1>2400 Yorkmont Road</AddressLine1>
            <City>Charlotte</City>
            <State>NC</State>
            <ZIPCode>28217</ZIPCode>
          </USAddress>
        </ContractorAddress>
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      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1>Mahan Slate Roofing Company</BusinessNameLine1>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1>32 Verge</AddressLine1>
            <City>Springfield</City>
            <State>MA</State>
            <ZIPCode>01129</ZIPCode>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Construction</ServicesDesc>
        <CompensationAmt>411134</CompensationAmt>
      </ContractorCompensationGrp>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1>CleanRoom Services Inc</BusinessNameLine1>
          </BusinessName>
        </ContractorName>
        <ContractorAddress>
          <USAddress>
            <AddressLine1>328 Forest Avenue</AddressLine1>
            <City>Brockton</City>
            <State>MA</State>
            <ZIPCode>02301</ZIPCode>
          </USAddress>
        </ContractorAddress>
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      <CntrctRcvdGreaterThan100KCnt>15</CntrctRcvdGreaterThan100KCnt>
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      <MembershipDuesAmt>0</MembershipDuesAmt>
      <FundraisingAmt>0</FundraisingAmt>
      <RelatedOrganizationsAmt>0</RelatedOrganizationsAmt>
      <GovernmentGrantsAmt>0</GovernmentGrantsAmt>
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      <TotalContributionsAmt>10068421</TotalContributionsAmt>
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        <BusinessCd>611600</BusinessCd>
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        <ExclusionAmt>0</ExclusionAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>Technology support fee</Desc>
        <BusinessCd>611710</BusinessCd>
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        <RelatedOrExemptFuncIncomeAmt>222000</RelatedOrExemptFuncIncomeAmt>
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      <ProgramServiceRevenueGrp>
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      <ProgramServiceRevenueGrp>
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      <ProgramServiceRevenueGrp>
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        <ExclusionAmt>4874662</ExclusionAmt>
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        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>6947</ExclusionAmt>
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        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>0</ExclusionAmt>
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        <RealAmt>412283</RealAmt>
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        <PersonalAmt>0</PersonalAmt>
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      <RentalIncomeOrLossGrp>
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        <PersonalAmt>0</PersonalAmt>
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      <NetRentalIncomeOrLossGrp>
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        <UnrelatedBusinessRevenueAmt>5309</UnrelatedBusinessRevenueAmt>
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      <GrossAmountSalesAssetsGrp>
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        <SecuritiesAmt>21651749</SecuritiesAmt>
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      <NetGainOrLossInvestmentsGrp>
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        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
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      <NetIncmFromFundraisingEvtGrp>
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        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
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        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
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        <UnrelatedBusinessRevenueAmt>-101926</UnrelatedBusinessRevenueAmt>
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      <GrantsToDomesticOrgsGrp>
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      <GrantsToDomesticIndividualsGrp>
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        <ProgramServicesAmt>5853132</ProgramServicesAmt>
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        <ProgramServicesAmt>0</ProgramServicesAmt>
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      <BenefitsToMembersGrp>
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        <ProgramServicesAmt>0</ProgramServicesAmt>
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      <CompCurrentOfcrDirectorsGrp>
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        <ManagementAndGeneralAmt>920270</ManagementAndGeneralAmt>
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        <ProgramServicesAmt>0</ProgramServicesAmt>
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      <PensionPlanContributionsGrp>
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        <ProgramServicesAmt>1056923</ProgramServicesAmt>
        <ManagementAndGeneralAmt>486932</ManagementAndGeneralAmt>
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        <FundraisingAmt>145645</FundraisingAmt>
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      <PayrollTaxesGrp>
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        <ProgramServicesAmt>471220</ProgramServicesAmt>
        <ManagementAndGeneralAmt>217095</ManagementAndGeneralAmt>
        <FundraisingAmt>71756</FundraisingAmt>
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        <ProgramServicesAmt>0</ProgramServicesAmt>
        <ManagementAndGeneralAmt>0</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </FeesForServicesManagementGrp>
      <FeesForServicesLegalGrp>
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        <ProgramServicesAmt>7366</ProgramServicesAmt>
        <ManagementAndGeneralAmt>55969</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
      </FeesForServicesLegalGrp>
      <FeesForServicesAccountingGrp>
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        <ProgramServicesAmt>10413</ProgramServicesAmt>
        <ManagementAndGeneralAmt>91101</ManagementAndGeneralAmt>
        <FundraisingAmt>0</FundraisingAmt>
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      <FeesForServicesLobbyingGrp>
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        <ProgramServicesAmt>0</ProgramServicesAmt>
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        <FundraisingAmt>0</FundraisingAmt>
      </FeesForServicesLobbyingGrp>
      <FeesForServicesProfFundraising>
        <TotalAmt>0</TotalAmt>
        <FundraisingAmt>0</FundraisingAmt>
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      <FeesForSrvcInvstMgmntFeesGrp>
        <TotalAmt>1436880</TotalAmt>
        <ProgramServicesAmt>1436880</ProgramServicesAmt>
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        <FundraisingAmt>0</FundraisingAmt>
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        <ProgramServicesAmt>392949</ProgramServicesAmt>
        <ManagementAndGeneralAmt>292753</ManagementAndGeneralAmt>
        <FundraisingAmt>29423</FundraisingAmt>
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      <AdvertisingGrp>
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        <ProgramServicesAmt>68074</ProgramServicesAmt>
        <ManagementAndGeneralAmt>163323</ManagementAndGeneralAmt>
        <FundraisingAmt>79259</FundraisingAmt>
      </AdvertisingGrp>
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        <ProgramServicesAmt>66707</ProgramServicesAmt>
        <ManagementAndGeneralAmt>79482</ManagementAndGeneralAmt>
        <FundraisingAmt>36186</FundraisingAmt>
      </OfficeExpensesGrp>
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        <ProgramServicesAmt>100534</ProgramServicesAmt>
        <ManagementAndGeneralAmt>278582</ManagementAndGeneralAmt>
        <FundraisingAmt>26637</FundraisingAmt>
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        <ExplanationTxt>The School follows FASB ASC 740, Income Taxes, which clarifies the accounting for uncertain income tax positions by prescribing the recognition threshold a tax position is required to meet before being recognized in the financial statements. The School recognizes a tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities. Management evaluated the School's tax positions and concluded that the School had no material uncertain income tax positions as of June 30, 2014 or 2013. The School is no longer subject to income tax examinations by the U.S. federal, state, or local tax authorities for fiscal years before 2011. The School will account for interest an penalties related to uncertain tax positions, if any, as part of tax expense.</ExplanationTxt>
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      <MaintainCpyOfAllSolInd>1</MaintainCpyOfAllSolInd>
      <DiscriminateRaceStdntsRghtsInd>0</DiscriminateRaceStdntsRghtsInd>
      <DiscriminateRaceAdmissPlcyInd>0</DiscriminateRaceAdmissPlcyInd>
      <DiscriminateRaceEmplmFcultyInd>0</DiscriminateRaceEmplmFcultyInd>
      <DiscriminateRaceSchsInd>0</DiscriminateRaceSchsInd>
      <DiscriminateRaceEducPlcyInd>0</DiscriminateRaceEducPlcyInd>
      <DiscriminateRaceUseOfFcltsInd>0</DiscriminateRaceUseOfFcltsInd>
      <DiscriminateRaceAthltProgInd>0</DiscriminateRaceAthltProgInd>
      <DiscriminateRaceOtherActyInd>0</DiscriminateRaceOtherActyInd>
      <GovernmentFinancialAidRcvdInd>0</GovernmentFinancialAidRcvdInd>
      <GovernmentFinancialAidRvkdInd>0</GovernmentFinancialAidRvkdInd>
      <ComplianceWithRevProc7550Ind>1</ComplianceWithRevProc7550Ind>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule E, Part I, Line 3</FormAndLineReferenceDesc>
        <ExplanationTxt>The School's application, which can be mailed upon request or accessed through the School's website at www.groton.org, clearly stipulates that Groton does not discriminate on the basis of gender, race, color, disability, religion, sexual orientation, or national origin in the administration of the School's admission policies and financial programs.</ExplanationTxt>
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    </IRS990ScheduleE>
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      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>Sub-Saharan Africa</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Program Services</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>Meetings with potential students from November 11, 2013 to November 15, 2013 in Botswana and South Africa.</SpecificServicesProvidedTxt>
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      </AccountActivitiesOutsideUSGrp>
      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>East Asia and the Pacific</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Program Services</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>Meetings with potential students from November 15, 2013 to November 18, 2013 in Hong Kong and Beijing.</SpecificServicesProvidedTxt>
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      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>South Asia</RegionTxt>
        <OfficesCnt>0</OfficesCnt>
        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Program Services</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>The School sponsored a global education trip to Bali from August 3, 2013 to August 25, 2013 involving 1 student.</SpecificServicesProvidedTxt>
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      <AccountActivitiesOutsideUSGrp>
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        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Program Services</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>The School sponsored a global education trip to Tanzania from June 20, 2013 to July 8, 2013 involving 17 students.</SpecificServicesProvidedTxt>
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      <AccountActivitiesOutsideUSGrp>
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        <EmployeeCnt>0</EmployeeCnt>
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        <SpecificServicesProvidedTxt>The School sponsored a global education trip to Kenya from July 8, 2013 to August 28, 2013 involving 9 students.</SpecificServicesProvidedTxt>
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      <AccountActivitiesOutsideUSGrp>
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        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Program Services</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>The School sponsored a global education trip to Rome from March 9, 2014 to March 20, 2014 involving 17 students.</SpecificServicesProvidedTxt>
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      <AccountActivitiesOutsideUSGrp>
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        <TypeOfActivitiesConductedTxt>Fundraising</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>Receptions held from March 13 to March 24 in Seoul, Hong Kong, and Shanghai.</SpecificServicesProvidedTxt>
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      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>South America</RegionTxt>
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        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Program Services</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>The School sponsored a global education trip to Peru from July 28, 2013 to August 18, 2013 involving 14 students.</SpecificServicesProvidedTxt>
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      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>Central America and the Caribbean</RegionTxt>
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        <TypeOfActivitiesConductedTxt>Investments</TypeOfActivitiesConductedTxt>
        <RegionTotalExpendituresAmt>53978820</RegionTotalExpendituresAmt>
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      <AccountActivitiesOutsideUSGrp>
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        <TypeOfActivitiesConductedTxt>Investments</TypeOfActivitiesConductedTxt>
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      <TotalOfficeCnt>0</TotalOfficeCnt>
      <TotalEmployeeCnt>0</TotalEmployeeCnt>
      <TotalSpentAmt>166041857</TotalSpentAmt>
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      <InterestInForeignTrustInd>0</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>0</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>0</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>0</ForeignPartnershipInd>
      <BoycottCountriesInd>0</BoycottCountriesInd>
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          <BusinessNameLine1>Town of Groton</BusinessNameLine1>
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        <USAddress>
          <AddressLine1>173 Main Street</AddressLine1>
          <City>Groton</City>
          <State>MA</State>
          <ZIPCode>01450</ZIPCode>
        </USAddress>
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        <PurposeOfGrantTxt>The contribution was made to help the Town of Groton subsidize their annual operating costs.</PurposeOfGrantTxt>
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      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1>Town of Groton</BusinessNameLine1>
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          <AddressLine1>173 Main Street</AddressLine1>
          <City>Groton</City>
          <State>MA</State>
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        <PurposeOfGrantTxt>This contribution was made to help the Town of Groton purchase gym equipment for the newly constructed fire station.</PurposeOfGrantTxt>
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      <Total501c3OrgCnt>1</Total501c3OrgCnt>
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        <GrantTypeTxt>Tuition Grant</GrantTypeTxt>
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        <NonCashAssistanceDesc>Credits are applied to the tuition bill as a means of subsidizing the overall tuition costs to qualified students attending Groton School</NonCashAssistanceDesc>
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      <GrantsOtherAsstToIndivInUSGrp>
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        <ValuationMethodUsedDesc>Travel grants that are applied to annual billing</ValuationMethodUsedDesc>
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      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>Incidental Grant</GrantTypeTxt>
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        <ValuationMethodUsedDesc>Credits are applied to monthly bill</ValuationMethodUsedDesc>
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      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>Laptop Grant</GrantTypeTxt>
        <RecipientCnt>38</RecipientCnt>
        <CashGrantAmt>51278</CashGrantAmt>
        <ValuationMethodUsedDesc>Payments made to purchase laptops for qualified students</ValuationMethodUsedDesc>
      </GrantsOtherAsstToIndivInUSGrp>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>Parent Travel Grant</GrantTypeTxt>
        <RecipientCnt>35</RecipientCnt>
        <CashGrantAmt>14714</CashGrantAmt>
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        <ValuationMethodUsedDesc>Payments made to travel agents for air travel and lodging</ValuationMethodUsedDesc>
      </GrantsOtherAsstToIndivInUSGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule I, Part I, Line 2</FormAndLineReferenceDesc>
        <ExplanationTxt>The School works directly with town officials and local charitable organizations to assess future needs and the use of current and past monetary grants. The School also makes several other small donations throughout the year based on charitable purpose, historical relationship, and current needs. These one time contributions are not typically monitored by the CFO or the Headmaster. Financial aid grants are awarded annually to qualified students and are applied as credits to the tuition bill up to the amount of the grant for the current academic year.</ExplanationTxt>
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      <IdemnificationGrossUpPmtsInd>X</IdemnificationGrossUpPmtsInd>
      <DiscretionarySpendingAcctInd>X</DiscretionarySpendingAcctInd>
      <PaymentsForUseOfResidenceInd>X</PaymentsForUseOfResidenceInd>
      <ClubDuesOrFeesInd>X</ClubDuesOrFeesInd>
      <PersonalServicesInd>X</PersonalServicesInd>
      <WrittenPolicyRefTAndEExpnssInd>1</WrittenPolicyRefTAndEExpnssInd>
      <SubstantiationRequiredInd>1</SubstantiationRequiredInd>
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      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>1</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>0</CompBsdOnRevRelatedOrgsInd>
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      <CompBsdNetEarnsRltdOrgsInd>0</CompBsdNetEarnsRltdOrgsInd>
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        <PersonNm>Richard B Commons</PersonNm>
        <TitleTxt>Headmaster</TitleTxt>
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        <PersonNm>Temba Maqubela</PersonNm>
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      <RltdOrgOfficerTrstKeyEmplGrp>
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        <DeferredCompensationFlngOrgAmt>43342</DeferredCompensationFlngOrgAmt>
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        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>John MacEachern</PersonNm>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>40971</DeferredCompensationFlngOrgAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Ian Gracey</PersonNm>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Katherine Bradley</PersonNm>
        <TitleTxt>Assistant Headmaster</TitleTxt>
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        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Craig Gemmell</PersonNm>
        <TitleTxt>Director of College Counseling</TitleTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 1a</FormAndLineReferenceDesc>
        <ExplanationTxt>Faculty are required to live in on-campus housing as a condition of employment. The Headmaster's home includes some space that is reserved for School related meetings and student activities. The cost of maintaining this allotted space is paid by the School and recorded as an operating expense. The Headmaster's contract, which is approved by the President and the Compensation Committee, includes the cost residential cleaning, and in the case of the former Headmaster, the cost of a golf club. These costs are recorded by the School as taxable benefits and reported on the W-2. The School will only pay for the cost of a traveling spouse when they are an authorized participant in School related functions. In such a case, the cost is treated as a non-taxable work related event.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule J, Part I, Line 4</FormAndLineReferenceDesc>
        <ExplanationTxt>The former Headmaster's contract, which was approved by the Board President and the Compensation Committee, included periodic contributions to a non-qualified 457(f) plan. $35,429 was disbursed from the plan to satisfy the tax obligations on an $75,907 vested benefit.</ExplanationTxt>
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        <UnspentAmt>15000000</UnspentAmt>
        <SubstantialCompletionYr>2016</SubstantialCompletionYr>
        <CurrentRefundingInd>1</CurrentRefundingInd>
        <AdvanceRefundingInd>0</AdvanceRefundingInd>
        <FinalAllocationMadeInd>0</FinalAllocationMadeInd>
        <AdequateBooksAndRecMaintInd>1</AdequateBooksAndRecMaintInd>
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        <BondReferenceCd>A</BondReferenceCd>
        <OwningBondFinancedPropertyInd>0</OwningBondFinancedPropertyInd>
        <AnyLeaseArrangementsInd>0</AnyLeaseArrangementsInd>
        <MgmtContractBondFincdPropInd>0</MgmtContractBondFincdPropInd>
        <AnyResearchAgreementsInd>0</AnyResearchAgreementsInd>
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        <PrivateBusConcerningUBIPct>0</PrivateBusConcerningUBIPct>
        <TotalPrivateBusinessUsePct>0</TotalPrivateBusinessUsePct>
        <BondIssMeetPrvtSecPymtTestInd>0</BondIssMeetPrvtSecPymtTestInd>
        <ChangeInUseBondFinancedPropInd>0</ChangeInUseBondFinancedPropInd>
        <ProcsNonqualifiedBondRemdtdInd>1</ProcsNonqualifiedBondRemdtdInd>
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      <TaxExemptBondsArbitrageGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <Form8038TFiledInd>0</Form8038TFiledInd>
        <RebateNotDueYetInd>0</RebateNotDueYetInd>
        <ExceptionToRebateInd>0</ExceptionToRebateInd>
        <NoRebateDueInd>0</NoRebateDueInd>
        <VariableRateIssueInd>1</VariableRateIssueInd>
        <HedgeIdentifiedInBksAndRecInd>1</HedgeIdentifiedInBksAndRecInd>
        <HedgeProviderName>
          <BusinessNameLine1>Morgan Stanley Capital Services</BusinessNameLine1>
          <BusinessNameLine2>Bank of New York Mellon</BusinessNameLine2>
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        <TermOfHedgePct>30</TermOfHedgePct>
        <SuperintegratedHedgeInd>0</SuperintegratedHedgeInd>
        <HedgeTerminatedInd>0</HedgeTerminatedInd>
        <GrossProceedsInvestedInGICInd>0</GrossProceedsInvestedInGICInd>
        <GrossProceedsInvestedInd>0</GrossProceedsInvestedInd>
        <WrittenProcToMonitorReqsInd>0</WrittenProcToMonitorReqsInd>
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      <ProceduresCorrectiveActionGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <ProceduresCorrectiveActionInd>1</ProceduresCorrectiveActionInd>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule K, Part IV, Line 4b-10/17/2013 75,000,000 Massachusetts Development Finance Agency</FormAndLineReferenceDesc>
        <ExplanationTxt>The Bank of New York Mellon Swap 15 Years, The Bank of New York Mellon Swap 38 Years, and Morgan Stanley Capital Services Swap 30 Years.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleK>
    <IRS990ScheduleL documentId="R000011" softwareId="13000241" softwareVersion="v1.00">
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <PersonNm>Vuyelwa M Maqubela</PersonNm>
        </NameOfInterested>
        <RelationshipDescriptionTxt>Headmaster's Wife</RelationshipDescriptionTxt>
        <TransactionAmt>57000</TransactionAmt>
        <TransactionDesc>English Teacher</TransactionDesc>
        <SharingOfRevenuesInd>0</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleM documentId="R000012" softwareId="13000241" softwareVersion="v1.00">
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>143</ContributionCnt>
        <NoncashContributionsRptF990Amt>1820553</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <Form8283ReceivedCnt>0</Form8283ReceivedCnt>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>1</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>0</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule M, Part I, Line 9</FormAndLineReferenceDesc>
        <ExplanationTxt>The number of security contributions is based on the number of gifts received and not the number of shares received.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="R000013" softwareId="13000241" softwareVersion="v1.00">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>A draft of the public disclosure version of the Form 990 was distributed electronically to each member of the Audit Committee. The Chair of the Audit Committee performed a thorough review of the draft, asked questions and suggested several revisions. The draft was also posted to a secure electronic portal, accessible by the full Board, prior to filing.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>All School officers, Key Employees, and members of the Board of Trustees are required annually to read the conflict of interest policy and sign the document. This signature indicates an understanding of the guidelines and an assurance to the Board that they are in compliance with the policy. Any potential conflict must be disclosed and reviewed by the President of the Board to determine if further action is required.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, Line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>An employment contract between the Headmaster and the School is updated periodically and renewed annually. Each year, the President of the Board and the Compensation Committee review the Headmaster's and other senior administrators' salaries and benefits. The salary survey provided by the Association of Business Officers of Preparatory Schools is used as a guide and a point of comparison. The annual salary and benefit offerings for the Chief Financial Officer are made by the Headmaster. All salaries and benefit offerings for the remaining School employees are updated annually and approved by the Chief Financial Officer or the Headmaster up to the aggregate salary increase approved by the Board of Trustees.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, Line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The Form 990 can be viewed on-line by going to guidestar.org, an independently operated website. Both the Form 990 and the financial statements can also be found on the Massachusetts Attorney General Website. The Conflict of Interest Policy and the Governing Documents may be viewed any time upon request for the same period of disclosure as set forth in section 6104(d).</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XI, Line 9</FormAndLineReferenceDesc>
        <ExplanationTxt>Interest rate swap agreements $60,406, split interest agreements $282,243, change in accrued pension liability $222,939, and recovery provision for uncollectible pledges (160,298).</ExplanationTxt>
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    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="R000014" softwareId="13000241" softwareVersion="v1.00">
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        <RelatedOrganizationName>
          <BusinessNameLine1>Charitable Remainder Trust (5)</BusinessNameLine1>
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          <AddressLine1>PO Box 991</AddressLine1>
          <City>Groton</City>
          <State>MA</State>
          <ZIPCode>01450</ZIPCode>
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        <PrimaryActivitiesTxt>Charitable Trust</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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          <BusinessNameLine1>Groton School</BusinessNameLine1>
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        <EntityTypeTxt>T</EntityTypeTxt>
        <ControlledOrganizationInd>1</ControlledOrganizationInd>
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      <IdRelatedOrgTxblCorpTrGrp>
        <RelatedOrganizationName>
          <BusinessNameLine1>Pooled Income Fund</BusinessNameLine1>
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          <AddressLine1>PO Box 991</AddressLine1>
          <City>Groton</City>
          <State>MA</State>
          <ZIPCode>01450</ZIPCode>
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        <PrimaryActivitiesTxt>Pooled Income Fund</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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          <BusinessNameLine1>Groton School</BusinessNameLine1>
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        <EntityTypeTxt>T</EntityTypeTxt>
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        <RelatedOrganizationName>
          <BusinessNameLine1>Growth Pooled Income Fund</BusinessNameLine1>
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          <AddressLine1>PO Box 991</AddressLine1>
          <City>Groton</City>
          <State>MA</State>
          <ZIPCode>01450</ZIPCode>
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        <PrimaryActivitiesTxt>Pooled Income Fund</PrimaryActivitiesTxt>
        <LegalDomicileStateCd>MA</LegalDomicileStateCd>
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          <BusinessNameLine1>Groton School</BusinessNameLine1>
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        <EntityTypeTxt>T</EntityTypeTxt>
        <ControlledOrganizationInd>1</ControlledOrganizationInd>
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      <ReceiptOfIntAnntsRntsRyltsInd>0</ReceiptOfIntAnntsRntsRyltsInd>
      <GiftGrntOrCapContriToOthOrgInd>0</GiftGrntOrCapContriToOthOrgInd>
      <GiftGrntCapContriFromOthOrgInd>0</GiftGrntCapContriFromOthOrgInd>
      <LoansOrGuaranteesToOtherOrgInd>0</LoansOrGuaranteesToOtherOrgInd>
      <LoansOrGuaranteesFromOthOrgInd>0</LoansOrGuaranteesFromOthOrgInd>
      <DivRelatedOrganizationInd>0</DivRelatedOrganizationInd>
      <AssetSaleToOtherOrgInd>0</AssetSaleToOtherOrgInd>
      <AssetPurchaseFromOtherOrgInd>0</AssetPurchaseFromOtherOrgInd>
      <AssetExchangeInd>0</AssetExchangeInd>
      <RentalOfFacilitiesToOthOrgInd>0</RentalOfFacilitiesToOthOrgInd>
      <RentalOfFcltsFromOthOrgInd>0</RentalOfFcltsFromOthOrgInd>
      <PerformOfServicesForOthOrgInd>0</PerformOfServicesForOthOrgInd>
      <PerformOfServicesByOtherOrgInd>0</PerformOfServicesByOtherOrgInd>
      <SharingOfFacilitiesInd>0</SharingOfFacilitiesInd>
      <PaidEmployeesSharingInd>0</PaidEmployeesSharingInd>
      <ReimbursementPaidToOtherOrgInd>0</ReimbursementPaidToOtherOrgInd>
      <ReimbursementPaidByOtherOrgInd>0</ReimbursementPaidByOtherOrgInd>
      <TransferToOtherOrgInd>0</TransferToOtherOrgInd>
      <TransferFromOtherOrgInd>0</TransferFromOtherOrgInd>
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      <ExplanationTxt>The form 8868, an application for Extension of Time to File an Exempt Organization Return, was filed on November 14, 2014. This extension provides the School's Board of Trustees the time necessary to complete a thorough review of the return.</ExplanationTxt>
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  </ReturnData>
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