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      <Form990PartVIISectionAGrp>
        <PersonNm>Suzanne O'Meara</PersonNm>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Dr Andrew Mecca</PersonNm>
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      <OtherExpensesGrp>
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      <OtherExpensesGrp>
        <Desc>DRAMA PRODUCTION</Desc>
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        <ProgramServicesAmt>63614</ProgramServicesAmt>
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      <OtherExpensesGrp>
        <Desc>STUDENT LUNCH</Desc>
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      <AllOtherExpensesGrp>
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          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
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      <TotalBookValueLandBuildingsAmt>8091086</TotalBookValueLandBuildingsAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>Rent deposits</Desc>
        <Amt>3350</Amt>
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      <TotalLiabilityAmt>3350</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>8565266</TotalRevEtcAuditedFinclStmtAmt>
      <NetUnrealizedGainsInvstAmt>-250278</NetUnrealizedGainsInvstAmt>
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      <RevenueNotReportedFinclStmtAmt>1167635</RevenueNotReportedFinclStmtAmt>
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      <ExpensesNotReportedAmt>275295</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>8393118</ExpensesSubtotalAmt>
      <OtherExpensesNotIncludedAmt>1167635</OtherExpensesNotIncludedAmt>
      <ExpensesNotRptFinclStmtAmt>1167635</ExpensesNotRptFinclStmtAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part V, Line 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>The School's endowment consists of a number of individual funds established for various purposes. The endowment may include both donor-restricted endowment funds and funds designated by the Board of Trustees to function as endowments. As required by U.S. GAAP, net assets associated with endowment funds, including funds designated by the Board of Trustees to function as endowments, are classified and reported based on the existence or absence of donor-imposed restrictions. INTERPRETATION OF RELEVANT LAW The Board of Trustees has interpreted the Uniform Prudent Management of Institutional Funds Act (UPMIFA) as requiring the preservation of the fair value of the original gift as of the gift date of the donor-restricted endowment funds absent explicit donor stipulations to the contrary. As a result of this interpretation, the School classifies as permanently restricted net assets (a) the original value of gifts donated to the permanent endowment, (b) the original value of subsequent gifts to the permanent endowment, and (c) accumulations to the permanent endowment made in accordance with the direction of the applicable donor gift instrument at the time the accumulation is added to the fund. The remaining portion of the donor-restricted endowment fund that is not classified in permanently restricted net assets is classified as temporarily restricted net assets until those amounts are appropriated for expenditure by the School in a manner consistent with the standard of prudence prescribed by UPMIFA. In accordance with UPMIFA, the School considers the following factors in making a determination to appropriate or accumulate donor-restricted endowment funds: (1) The duration and preservation of the fund (2) The purpose of the School and the donor-restricted endowment fund (3) General economic conditions (4) The possible effect of inflation and deflation (5) The expected total return from income and the appreciation of investments (6) Other resources of the School (7) The investment policies of the School From time to time, the fair value of assets associated with individual donor-restricted endowment funds may fall below the level that the donor or UPMIFA requires the School to retain as a fund of perpetual duration. In accordance with U.S GAAP, deficiencies of this nature are to be reported in unrestricted net assets. These deficiencies can result from unfavorable market fluctuations that occurred shortly after the investment of new permanently restricted contributions and continued appropriation for certain programs that was deemed prudent by the Board of Trustees. As of June 30, 2017, there were no significant investment deficiencies; and therefore, no amounts were reflected in unrestricted net assets. SPENDING POLICY AND HOW THE INVESTMENT OBJECTIVES RELATE TO THE SPENDING POLICY The School has adopted investment and spending policies for endowment assets that attempt to provide a predictable stream of funding to programs supported by its endowment while seeking to maintain the purchasing power of the endowment assets. Endowment assets include those assets of donor-restricted funds that the School must hold in perpetuity or for donor-specified periods. The School's current investment policy calls for target asset allocation of 60% equities and 40% bonds. The performance of these investments is measured against established equity and fixed income indices to provide for the a) preservation of capital, b) current income, and c) long-term growth of capital and income. To satisfy its long-term rate-of-return objectives, the School relies on a total return strategy in which investment returns are achieved through both capital appreciation (realized and unrealized) and current yield (interest and dividends). The School targets a diversified asset allocation intended to achieve its long-term return objectives within prudent risk constraints. In October 2016, the Board authorized the total transfer of up to $1.8 million in endowment funds to the School's general fund. The amount represents temporarily restricted endowment net assets at June 30, 2016. The Board concluded that approximately $1.4 million is income earned on the endowment investments over the years and that approximately $400,000 represent contributions to scholarships funds. Historically, the School has granted scholarships to many students but has not transferred any portion of the endowment funds to compensate for the general fund for the costs of those scholarships. The Board is aware that a draw in excess of 7% of total endowment is presumed "imprudent." However, upon deliberation and consultation with legal counsel, the Board reasonably believes that this draw is necessary and critical to ensure the ongoing financial health of the School. Based on the above, the Board appropriated $1.6 million of temporarily restricted endowment net assets during the year ended June 30, 2017, and will appropriate an additional $200,000 in the year ending June 30, 2018.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part X, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>The School is a qualified organization exempt from federal income taxes under section 501(c)(3) of the Internal Revenue Code (IRC) and franchise taxes under section 23701d of the California Revenue and Taxation Code, respectively. Accordingly, it is exempt from federal and California income taxes and is not liable for federal unemployment taxes. Management evaluated the School's tax positions and concluded that they maintained their tax exempt status and had taken no uncertain tax positions that would require adjustment to the financial statements. Therefore, no provision or liability for income taxes has been included in the financial statements. The School is subject to routine audits by taxing jurisdictions; however, there are no audits in process.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XI, Line 2d - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>auction expense netted against gross income from fundraising events 177,745.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XI, Line 4b - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>financial aid netted against tuition 1,167,635.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XII, Line 2d - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>auction expense netted against gross income from fundraising events 177,745.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XII, Line 4b - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>financial aid netted against revenue 1,167,635.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleE documentId="RetDoc1040400001">
      <NondiscriminatoryPolicyStmtInd>1</NondiscriminatoryPolicyStmtInd>
      <PolicyStmtInBrochuresEtcInd>1</PolicyStmtInBrochuresEtcInd>
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      <DiscriminateRaceSchsInd>0</DiscriminateRaceSchsInd>
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      <ComplianceWithRevProc7550Ind>1</ComplianceWithRevProc7550Ind>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule E, Part I, Line 3</FormAndLineReferenceDesc>
        <ExplanationTxt>the racial non-discriminatory policy was published in the san francisco chronicle on June 6, 2017.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Schedule E, Part I, Line 4</FormAndLineReferenceDesc>
        <ExplanationTxt>The school does not keep such records for the student body but does for the faculty and administrative staff.</ExplanationTxt>
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        <CharitableContriEvent1Amt>241330</CharitableContriEvent1Amt>
        <GrossRevenueEvent1Amt>177745</GrossRevenueEvent1Amt>
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        <OthDirectExpnssTotalEventsAmt>78463</OthDirectExpnssTotalEventsAmt>
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        <NetIncomeSummaryAmt>0</NetIncomeSummaryAmt>
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    <IRS990ScheduleI documentId="RetDoc1041900001">
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      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>Tuition assistance</GrantTypeTxt>
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        <NonCashAssistanceDesc>Tuition assistance</NonCashAssistanceDesc>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL AWARDS ARE NEED BASED. ALL APPLICANTS FOR FINANCIAL ASSISTANCE MUST APPLY THROUGH SSS (SCHOOL SCHOLARSHIP SERVICE) IN PRINCETON, NEW JERSEY, AN "OUT OF HOUSE" CLEARING ORGANIZATION THAT IS COORDINATED THROUGH NAIS (NATIONAL ASSOCIATION OF INDEPENDENT SCHOOLS).</ExplanationTxt>
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      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
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      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
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      <InitialContractExceptionInd>0</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Andrew Davis</PersonNm>
        <TitleTxt>Head of School</TitleTxt>
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        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <TotalCompensationFilingOrgAmt>165402</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Rosemarie Nicolini</PersonNm>
        <TitleTxt>Director of Operations and Facilitie</TitleTxt>
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        <PersonNm>David Baker</PersonNm>
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        <DeferredCompensationFlngOrgAmt>6866</DeferredCompensationFlngOrgAmt>
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        <TotalCompensationFilingOrgAmt>180310</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Dr Andrew Mecca</PersonNm>
        <TitleTxt>Former Interim Head of School</TitleTxt>
        <BaseCompensationFilingOrgAmt>140000</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
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        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>12616</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>152616</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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        <FormAndLineReferenceDesc>Part I, Line 1a</FormAndLineReferenceDesc>
        <ExplanationTxt>The Head of School lives in a school-owned house which is furnished by the school for the convenience of the school and is not taxable to the Head of School under IRC section 119.</ExplanationTxt>
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    <IRS990ScheduleL documentId="RetDoc1042800001">
      <GrntAsstBnftInterestedPrsnGrp>
        <PersonNm>Xania Robinson</PersonNm>
        <RelationshipWithOrgTxt>trustee</RelationshipWithOrgTxt>
        <CashGrantAmt>39140</CashGrantAmt>
        <TypeOfAssistanceTxt>noncash financial aid to family memeber</TypeOfAssistanceTxt>
        <AssistancePurposeTxt>tuition assistance</AssistancePurposeTxt>
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      <GrntAsstBnftInterestedPrsnGrp>
        <PersonNm>maureen denicke</PersonNm>
        <RelationshipWithOrgTxt>trustee</RelationshipWithOrgTxt>
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        <TypeOfAssistanceTxt>noncash financial aid to family memeber</TypeOfAssistanceTxt>
        <AssistancePurposeTxt>tuition assistance</AssistancePurposeTxt>
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        <ContributionCnt>5</ContributionCnt>
        <NoncashContributionsRptF990Amt>67566</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FAIR MARKET VALUE</MethodOfDeterminingRevenuesTxt>
      </SecuritiesPubliclyTradedGrp>
      <AnyPropertyThatMustBeHeldInd>0</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>0</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>0</ThirdPartiesUsedInd>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, part iii, line 1, description of organization's mission:</FormAndLineReferenceDesc>
        <ExplanationTxt>Mount Tamalpais School (the "School or "MTS") is a co-educational day school enrolling up to 240 children in Kindergarten through Grade 8. The School is dedicated to the active pursuit of knowledge, integrity, and fairness. Our students embrace diversity, honoring the value of each individual's strengths, choices, feelings, and ideas. Our faculty members serve as guides and role models, committed to engaging and challenging our students with a strong, interactive, and multidisciplinary curriculum. Founded in 1976, the School provides students with a solid academic foundation, and fosters a genuine enthusiasm for learning through a departmentalized, integrated curriculum. Rather than a teacher assigned to teach an entire grade level, with students glued to their seats all day, our teachers teach a single subject, and students move from classroom to classroom. With educators practicing their passion, and students on the move every 40 minutes, energy levels remain high, and everyone - students and teachers alike - feel refreshed and eager to take on the next challenge. Students have access to the outdoors and nearby trails throughout their time at the School. Field trips occur all through the year to local museums, the symphony, and other locations that extend the curriculum. Bus service is offered between the School and local communities, including San Francisco. Mount Tamalpais School admits students of any race, religion, national or ethnic origin to enjoy all the rights, privileges, programs and activities available at the School. The School's mission statement is as follows: Mount Tamalpais School is committed to the development of knowledge and goodness within children in an academically inspiring and nurturing environment. A MTS education, vigorous, creative and process-driven, develops children who are well prepared for their future while remaining young at heart. We infuse the academic, artistic, and athletic programs with the values of kindness, integrity, respect, and self-reliance so that all students can fully realize their human potential.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>THE school'S FORM 990 IS PREPARED BY AN OUTSIDE CPA FIRM. THE FORM 990 IS THEN REVIEWED BY MANAGEMENT Of THE school BEFORE IT IS SENT TO THE BOARD OF TRUSTEES. THE BOARD OF TRUSTEES APPROVE THE FORM 990 BEFORE IT IS FINALIZED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Mount Tamalpias has a written conflict of interest policy and form that they have all trustees and Head of school sign. These were signed in August 2016.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 15a</FormAndLineReferenceDesc>
        <ExplanationTxt>the board or subcommittee approved the head of school's compensation.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>RECORDS ARE AVAILABLE TO THE PUBLIC UPON REQUEST. IN ADDITION, OPERATING INFORMATION IS PUBLISHED IN THE ANNUAL REPORT.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
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</Return>