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        <BookValueAmt>448483</BookValueAmt>
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      <FootnoteTextInd>X</FootnoteTextInd>
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      <NetUnrealizedGainsInvstAmt>621866</NetUnrealizedGainsInvstAmt>
      <DonatedServicesAndUseFcltsAmt>100</DonatedServicesAndUseFcltsAmt>
      <OtherRevenueAmt>84247</OtherRevenueAmt>
      <RevenueNotReportedAmt>706213</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>17097337</RevenueSubtotalAmt>
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      <RevenueNotReportedFinclStmtAmt>3309104</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>20406441</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>16321167</TotExpnsEtcAuditedFinclStmtAmt>
      <DonatedServicesUseFcltsAmt>100</DonatedServicesUseFcltsAmt>
      <OtherExpensesIncludedAmt>84247</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>84347</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>16236820</ExpensesSubtotalAmt>
      <OtherExpensesNotIncludedAmt>3309104</OtherExpensesNotIncludedAmt>
      <ExpensesNotRptFinclStmtAmt>3309104</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>19545924</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part V, Line 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CAMBRIDGE SCHOOL OF WESTON MAINTAINS ITS ENDOWMENT FUNDS TO DIRECTLY SUPPORT FACULTY SALARIES, INSTRUCTIONAL &amp; ACADEMIC SUPPORT, STUDENT ACTIVITIES AND SCHOLARSHIPS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part X, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SCHOOL ACCOUNTS FOR THE EFFECT OF ANY UNCERTAIN TAX POSITIONS BASED ON A "MORE LIKELY THAN NOT" THRESHOLD TO THE RECOGNITION OF THE TAX POSITIONS BEING SUSTAINED BASED ON THE TECHNICAL MERITS OF THE POSITION UNDER SCRUTINY BY THE APPLICABLE TAXING AUTHORITY. IF A TAX POSITION OR POSITIONS ARE DEEMED TO RESULT IN UNCERTAINTIES OF THOSE POSITIONS, THE UNRECOGNIZED TAX BENEFIT IS ESTIMATED BASED ON A "CUMULATIVE PROBABILITY ASSESSMENT" THAT AGGREGATES THE ESTIMATED TAX LIABILITY FOR ALL UNCERTAIN TAX POSITIONS. THE SCHOOL HAS IDENTIFIED ITS TAX STATUS AS A TAX EXEMPT ENTITY AS A TAX POSITION; HOWEVER, THE SCHOOL HAS DETERMINED THAT SUCH TAX POSITION DOES NOT RESULT IN AN UNCERTAINTY REQUIRING RECOGNITION. THE SCHOOL IS NOT CURRENTLY UNDER EXAMINATION BY ANY TAXING JURISDICTIONS. THE SCHOOL'S FEDERAL AND STATE TAX RETURNS ARE GENERALLY OPEN FOR EXAMINATION FOR THREE YEARS FOLLOWING THE DATE FILED.</ExplanationTxt>
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      <SupplementalInformationDetail>
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      <SupplementalInformationDetail>
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      <SupplementalInformationDetail>
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      <SupplementalInformationDetail>
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      <MaintainScholarshipsRecsInd>1</MaintainScholarshipsRecsInd>
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      <DiscriminateRaceAdmissPlcyInd>0</DiscriminateRaceAdmissPlcyInd>
      <DiscriminateRaceEmplmFcultyInd>0</DiscriminateRaceEmplmFcultyInd>
      <DiscriminateRaceSchsInd>0</DiscriminateRaceSchsInd>
      <DiscriminateRaceEducPlcyInd>0</DiscriminateRaceEducPlcyInd>
      <DiscriminateRaceUseOfFcltsInd>0</DiscriminateRaceUseOfFcltsInd>
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        <ExplanationTxt>YEARLY AN ADVERTISEMENT APPEARS IN THE BOSTON GLOBE NEWSPAPER AS PART OF AN ASSOCIATION FOR INDEPENDENT SCHOOLS OF NEW ENGLAND: NOTICE OF NONDISCRIMINATION POLICY AS TO STUDENTS"</ExplanationTxt>
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      <EmailSolicitationsInd>X</EmailSolicitationsInd>
      <PhoneSolicitationsInd>X</PhoneSolicitationsInd>
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          <BusinessNameLine1Txt>The SPENCER GROUP</BusinessNameLine1Txt>
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        <USAddress>
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          <StateAbbreviationCd>VT</StateAbbreviationCd>
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      <FundraiserActivityInfoGrp>
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          <CityNm>CHICAGO</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
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        <ExplanationTxt>FINANCIAL AID SCHOLARSHIPS ARE GRANTED TO CAMBRIDGE SCHOOL OF WESTON STUDENTS WHO DEMONSTRATE FINANCIAL NEED. THE FINANCIAL AID BUDGET IS APPROVED BY THE BOARD OF TRUSTEES. THE CAMBRIDGE SCHOOL OF WESTON OFFERS TUITION DISCOUNTS TO QUALIFYING EMPLOYEES FOR ITS TWO MAJOR PROGRAMS - THE HIGH SCHOOL AND SUMMER CAMP. Scholarship funds and tuition remission amounts are applied directly to students' accounts.</ExplanationTxt>
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        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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        <DeferredCompensationFlngOrgAmt>7282</DeferredCompensationFlngOrgAmt>
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        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>161089</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
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        <ExplanationTxt>THE CAMBRIDGE SCHOOL OF WESTON HEAD OF SCHOOL IS REQUIRED TO LIVE ON CAMPUS. THE SCHOOL PROVIDES A PERSONAL RESIDENCE ON CAMPUS FOR THE FAMILY OF THE HEAD OF SCHOOL. THE ESTIMATED VALUE OF THIS NONTAXABLE BENEFIT IS $36,000, WHICH IS BASED ON THE RENTAL INCOME RECENTLY RECEIVED BY CSW ON A COMPARABLE HOUSE ON THE SCHOOL'S PROPERTY. THE CAMBRIDGE SCHOOL OF WESTON DIRECTOR OF FINANCE AND OPERATIONS IS ALSO REQUIRED TO LIVE ON CAMPUS. THE ESTIMATED VALUE OF THIS NONTAXABLE BENEFIT IS $18,000, WHICH IS BASED ON THE RENTAL INCOME RECENTLY RECEIVED BY CSW ON A COMPARABLE HOUSE ON THE SCHOOL'S PROPERTY.</ExplanationTxt>
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        <AnyLeaseArrangementsInd>0</AnyLeaseArrangementsInd>
        <MgmtContractBondFincdPropInd>0</MgmtContractBondFincdPropInd>
        <AnyResearchAgreementsInd>0</AnyResearchAgreementsInd>
        <BondIssMeetPrvtSecPymtTestInd>0</BondIssMeetPrvtSecPymtTestInd>
        <ChangeInUseBondFinancedPropInd>0</ChangeInUseBondFinancedPropInd>
        <ProcsNonqualifiedBondRemdtdInd>0</ProcsNonqualifiedBondRemdtdInd>
      </TaxExemptBondsPrivateBusUseGrp>
      <TaxExemptBondsPrivateBusUseGrp>
        <BondReferenceCd>B</BondReferenceCd>
        <OwningBondFinancedPropertyInd>0</OwningBondFinancedPropertyInd>
        <AnyLeaseArrangementsInd>0</AnyLeaseArrangementsInd>
        <MgmtContractBondFincdPropInd>0</MgmtContractBondFincdPropInd>
        <AnyResearchAgreementsInd>0</AnyResearchAgreementsInd>
        <BondIssMeetPrvtSecPymtTestInd>0</BondIssMeetPrvtSecPymtTestInd>
        <ChangeInUseBondFinancedPropInd>0</ChangeInUseBondFinancedPropInd>
        <ProcsNonqualifiedBondRemdtdInd>0</ProcsNonqualifiedBondRemdtdInd>
      </TaxExemptBondsPrivateBusUseGrp>
      <TaxExemptBondsArbitrageGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <Form8038TFiledInd>0</Form8038TFiledInd>
        <RebateNotDueYetInd>0</RebateNotDueYetInd>
        <ExceptionToRebateInd>0</ExceptionToRebateInd>
        <NoRebateDueInd>0</NoRebateDueInd>
        <VariableRateIssueInd>1</VariableRateIssueInd>
        <HedgeIdentifiedInBksAndRecInd>0</HedgeIdentifiedInBksAndRecInd>
        <GrossProceedsInvestedInGICInd>0</GrossProceedsInvestedInGICInd>
        <GrossProceedsInvestedInd>0</GrossProceedsInvestedInd>
        <WrittenProcToMonitorReqsInd>0</WrittenProcToMonitorReqsInd>
      </TaxExemptBondsArbitrageGrp>
      <TaxExemptBondsArbitrageGrp>
        <BondReferenceCd>B</BondReferenceCd>
        <Form8038TFiledInd>0</Form8038TFiledInd>
        <RebateNotDueYetInd>0</RebateNotDueYetInd>
        <ExceptionToRebateInd>0</ExceptionToRebateInd>
        <NoRebateDueInd>0</NoRebateDueInd>
        <VariableRateIssueInd>1</VariableRateIssueInd>
        <HedgeIdentifiedInBksAndRecInd>0</HedgeIdentifiedInBksAndRecInd>
        <GrossProceedsInvestedInGICInd>0</GrossProceedsInvestedInGICInd>
        <GrossProceedsInvestedInd>0</GrossProceedsInvestedInd>
        <WrittenProcToMonitorReqsInd>0</WrittenProcToMonitorReqsInd>
      </TaxExemptBondsArbitrageGrp>
      <ProceduresCorrectiveActionGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <ProceduresCorrectiveActionInd>1</ProceduresCorrectiveActionInd>
      </ProceduresCorrectiveActionGrp>
      <ProceduresCorrectiveActionGrp>
        <BondReferenceCd>B</BondReferenceCd>
        <ProceduresCorrectiveActionInd>1</ProceduresCorrectiveActionInd>
      </ProceduresCorrectiveActionGrp>
    </IRS990ScheduleK>
    <IRS990ScheduleL documentId="RetDoc1042800001">
      <GrntAsstBnftInterestedPrsnGrp>
        <PersonNm>SEE EXPLANATION BELOW</PersonNm>
        <RelationshipWithOrgTxt>SEE PART V</RelationshipWithOrgTxt>
        <CashGrantAmt>42860</CashGrantAmt>
        <TypeOfAssistanceTxt>FINANCIAL AID</TypeOfAssistanceTxt>
      </GrntAsstBnftInterestedPrsnGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE L, PART III</FormAndLineReferenceDesc>
        <ExplanationTxt>FINANCIAL AID GRANTED TO THE CHILDREN OF TRUSTEES OR STUDENT REPRESENTATIVES IS BASED ON NEED THAT MUST BE DEMONSTRATED THROUGH THE STANDARD APPLICATION FOR FINANCIAL AID PROCESS; FOR PRIVACY CONSIDERATIONS, THE NAMES OF RECIPIENTS ARE NOT DISCLOSED AND ONLY THE TYPE OF ASSISTANCE AND THE AGGREGATE AMOUNT ARE REPORTED ON SCHEDULE L, PART III.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleL>
    <IRS990ScheduleM documentId="RetDoc1042900001">
      <WorksOfArtGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>2</ContributionCnt>
        <NoncashContributionsRptF990Amt>400</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </WorksOfArtGrp>
      <BooksAndPublicationsGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <NoncashContributionsRptF990Amt>190</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </BooksAndPublicationsGrp>
      <SecuritiesPubliclyTradedGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <ContributionCnt>13</ContributionCnt>
        <NoncashContributionsRptF990Amt>180928</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>MUSIC EQUIPMENT</Desc>
        <ContributionCnt>1</ContributionCnt>
        <NoncashContributionsRptF990Amt>2340</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>1</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>1</ThirdPartiesUsedInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 32b:</FormAndLineReferenceDesc>
        <ExplanationTxt>All stock gifts are received and sold by a brokerage firm, JP Morgan.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART I AND PART III</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CAMBRIDGE SCHOOL OF WESTON'S MISSION IS TO PROVIDE A PROGRESSIVE EDUCATION THAT EMPHASIZES DEEP LEARNING, MEANINGFUL RELATIONSHIPS AND A DYNAMIC PROGRAM THAT INSPIRES STUDENTS TO DISCOVER WHO THEY ARE AND WHAT THEIR CONTRIBUTION IS TO THEIR SCHOOL, THEIR COMMUNITY AND THE WORLD.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>THE DOCUMENT IN ITS ENTIRETY WAS REVIEWED BY THE SCHOOL'S HEAD, DIRECTOR OF FINANCE &amp; OPERATIONS AND CONTROLLER. THE FULL DOCUMENT WITH SCHEDULE B DONOR NAMES AND ADDRESSES REDACTED WAS THEN PRESENTED FOR REVIEW AND APPROVAL OF THE BOARD CHAIR AND TREASURER. THE DOCUMENT WITH THE SAME REDACTION WAS THEN MADE AVAILABLE TO THE FULL BOARD OF TRUSTEES PRIOR TO FILING. THE DONOR NAME AND ADDRESS REDACTIONS WERE MADE TO PRESERVE THE CONFIDENTIALITY OF DONORS INCLUDING THOSE WHO DONATE TO THE SCHOOL ANONYMOUSLY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>THE BOARD ANNUALLY REQUESTS BOARD MEMBERS TO CERTIFY, IN WRITING, THAT THEY HAVE NO CONFLICTS OF INTEREST BY SIGNING A CONFLICT OF INTEREST DISCLOSURE FORM. The chair of the board reviews the conflict of interest forms to determine if a potential conflict exists. If a potential conflict is found to exist the member would be asked to resign their position on the board.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CAMBRIDGE SCHOOL OF WESTON IS A MEMBER OF THE NATIONAL ASSOCIATION OF INDEPENDENT SCHOOLS. AS PART OF ITS SERVICES, NAIS COLLECTS STATISTICS ON INDEPENDENT SCHOOLS RANGING FROM BASIC ENROLLMENT AND GRADES SERVED THROUGH TO HEAD OF SCHOOL COMPENSATION. THROUGH ITS BENCHMARK TOOLS, THE CAMBRIDGE SCHOOL OF WESTON IS ABLE TO CREATE A REPORT BASED ON SCHOOLS OF SIMILAR SIZE AND GRADES THAT ENABLES US TO SURVEY AND COMPARE SALARY INFORMATION FOR HEADS OF SCHOOL. IN ADDITION, THE CAMBRIDGE SCHOOL OF WESTON IDENTIFIES SCHOOLS OF LIKE SIZE IN OUR GEOGRAPHIC AREA AND UTILIZES GUIDESTAR.ORG TO VIEW COMPETITOR SCHOOL'S 990 FOR THE PURPOSES OF COMPARING HEAD OF SCHOOL SALARIES. THE DATA IS PRESENTED TO THE SCHOOL'S BOARD OF TRUSTEES WHO ESTABLISH THE HEAD OF SCHOOL'S SALARY ANNUALLY. RESEARCH DOCUMENTS SUPPORTING THE BOARD'S DECISION ARE FILED IN THE HEAD'S PERSONNEL FILE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>AVAILABLE UPON REQUEST</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII - FINANCIAL STATEMENTS AND REPORTING</FormAndLineReferenceDesc>
        <ExplanationTxt>RESPONSIBILITIES OF THE AUDIT COMMITTEE HAS REMAINED UNCHANGED FROM THE PRIOR YEAR.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART V - STATEMENT REGARDING OTHER IRS FILINGS AND TAX COMPLIANCE</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SCHOOL DID NOT RECEIVE DONATIONS OF QUALIFIED INTELLECTUAL PROPERTY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART V - STATEMENT REGARDING OTHER IRS FILINGS AND TAX COMPLIANCE</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SCHOOL DID NOT RECEIVE CONTRIBUTIONS OF CARS, BOATS, AIRPLANES OR OTHER VEHICLES.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>