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      <Form990PartVIISectionAGrp>
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        <Desc>STUDENT ACTIV. &amp; SUPP.</Desc>
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      <OtherExpensesGrp>
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      <OtherExpensesGrp>
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        <ManagementAndGeneralAmt>12611</ManagementAndGeneralAmt>
        <FundraisingAmt>7098</FundraisingAmt>
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        <ProgramServicesAmt>10467036</ProgramServicesAmt>
        <ManagementAndGeneralAmt>2220463</ManagementAndGeneralAmt>
        <FundraisingAmt>215274</FundraisingAmt>
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        <EOYAmt>526607</EOYAmt>
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        <EOYAmt>1806992</EOYAmt>
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      <InfoInScheduleOPartXIIInd>X</InfoInScheduleOPartXIIInd>
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      <ContributorInformationGrp>
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        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
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        <MethodValuationCd>F</MethodValuationCd>
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        <Desc>STUDENT ACTIVITY FUNDS - PAYABLE</Desc>
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        <Desc>FINANCE LEASE PAYABLE</Desc>
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      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART III, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>PHILLIP KING SIGNED SCULPTURE ENTITLED "DARWIN" DISPLAYED IN FRONT OF THE SCIENCE BUILDING.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART V, LINE 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>IN 1995, THE SCHOOL RECEIVED A $250,000 PERPETUALLY RESTRICTED ENDOWMENT FUND THAT IS BEING ADMINISTERED BY THE SAN ANTONIO AREA FOUNDATION. EACH YEAR THE SCHOOL HAS THE RIGHTS TO DISTRIBUTIONS OF THE NET INCOME FROM THE FUND TO BE USED EXCLUSIVELY FOR EXPENSES RELATED TO THE EDWIN W. EARGLE LIBRARY. IN 2025, THE SCHOOL RECEIVED AN ADDITIONAL $2,000 IN PERPETUALLY RESTRICTED ENDOWMENT GIFTS. OTHER PERPETUALLY RESTRICTED ENDOWMENT GIFTS TOTALING $471,050 WERE RECEIVED PRIOR TO THE YEAR ENDED MAY 31, 2025. THE SCHOOL HAS THE RIGHTS TO EARNINGS FROM THESE GIFTS TO BE USED EXCLUSIVELY FOR TEACHER SUPPORT AND STUDENT ASSISTANCE. THE SCHOOL RECEIVED $101,125 AND $3,825 IN PERPETUALLY RESTRICTED ENDOWMENT GIFTS FOR THE YEARS ENDED MAY 31, 2025 AND 2024, RESPECTIVELY. OTHER PERPETUALLY RESTRICTED ENDOWMENT GIFTS TOTALING $243,619 WERE RECEIVED PRIOR TO THE YEAR ENDED MAY 31, 2024. THE SCHOOL HAS THE RIGHTS TO THE EARNINGS FROM THESE GIFTS TO BE USED EXCLUSIVELY FOR LOWER SCHOOL FINANCIAL AID. THE SCHOOL'S ENDOWMENT IS MADE UP OF DONOR-RESTRICTED ENDOWMENT FUNDS. AS REQUIRED BY GAAP, NET ASSETS ASSOCIATED WITH ENDOWMENT FUNDS, INCLUDING FUNDS DESIGNATED BY THE BOARD TO FUNCTION AS ENDOWMENTS, ARE CLASSIFIED AND REPORTED BASED ON THE EXISTENCE OR ABSENCE OF DONOR-IMPOSED RESTRICTIONS.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>PROFESSIONAL FUNDRAISING SERVICES -70,000.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 4B - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>TUITION DISCOUNTS 691,954.</ExplanationTxt>
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        <FormAndLineReferenceDesc>SCHEDULE E, PART I, LINE 3</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SCHOOL PUBLICIZES ITS RACIALLY NONDISCRIMINATORY POLICY IN A SAN ANTONIO NEWSPAPER AT LEAST ONCE A YEAR. THE SCHOOL ALSO INCLUDES ITS POLICY IN OTHER ADVERTISEMENTS, REGARDLESS OF MEDIA, AND IN ITS APPLICATIONS.</ExplanationTxt>
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          <BusinessNameLine1Txt>LEE &amp; ASSOCIATES LLC</BusinessNameLine1Txt>
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          <AddressLine1Txt>PO BOX 31</AddressLine1Txt>
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          <StateAbbreviationCd>TX</StateAbbreviationCd>
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        </USAddress>
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        <FundraiserControlOfFundsInd>0</FundraiserControlOfFundsInd>
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        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>369971</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
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        <PersonNm>MICHAEL FLYNN</PersonNm>
        <TitleTxt>CFO</TitleTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SECTION 1.263(A)-1(F) DE MINIMIS SAFE HARBOR ELECTION</FormAndLineReferenceDesc>
        <ExplanationTxt>KEYSTONE SCHOOL 119 E. CRAIG PLACE SAN ANTONIO, TX 78212 EMPLOYER IDENTIFICATION NUMBER: 74-1193337 FOR THE YEAR ENDING MAY 31, 2025 KEYSTONE SCHOOL IS MAKING THE DE MINIMIS SAFE HARBOR ELECTION UNDER REG. SEC. 1.263(A)-1(F).</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>PART A: THE FORM 990 IS FIRST REVIEWED BY THE FINANCE COMMITTEE, AND THEN BY THE ENTIRE BOARD OF DIRECTORS AT AN ANNUAL BOARD MEETING PRIOR TO SUBMITTING THE FORM FOR REPORTING PURPOSES. AT THE ANNUAL BOARD MEETING, ALL TRUSTEES AND DIRECTORS ARE ALLOWED TO REVIEW THE FORM 990 AND ASK ANY QUESTIONS THAT MAY ARISE. THE FINAL APPROVED FORM 990 IS THEN SUBMITTED TO THE INTERNAL REVENUE SERVICE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION MONITORS &amp; ENFORCES COMPLIANCE WITH THE CONFLICT OF INTEREST POLICY THROUGH AN ANNUAL VERIFICATION DOCUMENT.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>THE EXECUTIVE COMMITTEE, SERVING AS THE COMPENSATION COMMITTEE, USES THE NONPROFIT INFORMATION SERVICE COMPANY, GUIDESTAR USA, INC., TO COMPILE INFORMATION REGARDING COMPARABLE COMPENSATION FOR NONPROFIT SCHOOLS. FURTHER, THE ORGANIZATION USES COMPENSATION REPORTS FROM AN ANNUAL SURVEY CONDUCTED BY THE INDEPENDENT SCHOOLS ASSOCIATION OF THE SOUTHWEST (ISAS), AND DATA FROM THE NATIONAL ASSOCIATION OF INDEPENDENT SCHOOLS (NAIS) STATSONLINE SERVICE IN DETERMINING THE SALARY COMPONENTS OF ALL CONTRACTS. THE BOARD OF DIRECTORS REVIEW AND APPROVE COMPENSATION FOR TOP MANAGEMENT OFFICIALS, OTHER OFFICERS AND KEY EMPLOYEES. THE LAST COMPENSATION REVIEW WAS PERFORMED IN 2023.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION MAKES ITS GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICY, AND FINANCIAL STATEMENTS AVAILABLE TO THE PUBLIC UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XII, LINE 2C</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S PROCESS FOR ASSUMING RESPONSIBILITY FOR OVERSIGHT OF THE AUDIT, REVIEW, OR COMPILATION OF ITS FINANCIAL STATEMENTS AND THE SELECTION OF AN INDEPENDENT AUDITOR HAVE NOT CHANGED FROM THE PRIOR YEAR.</ExplanationTxt>
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        <ControlledOrganizationInd>0</ControlledOrganizationInd>
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      <IdRelatedTaxExemptOrgGrp>
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