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      <Desc>Mason Preparatory School educates approximately 320 students from pre-kindergarten through eighth grade programs. The School is accredited by the Southern Association of Colleges and Schools (SACS), the Southern Association of Independent Schools (SAIS), and the South Carolina Independent School Association (SCISA). The School is also a member of the National Association of Independent Schools (NAIS) and the Palmetto Association of Independent Schools (PAIS). The School has a student to teacher ratio of 10 to 1. The School's program is as follows: (Continued on Schedule O)Two homerooms per gradeIndividual assistants in each pre-kindergarten, kindergarten and 1st grade class, shared assistants in each grade 2-4 ; State of the art technology equipment with technology instruction beginning in kindergarten; 1:1 iPad/tablet program in grades 3-8; Weekly curriculum including art, music, media center, physical education, guidance, French and/or Spanish Carnegie unit available in Algebra I and French I or Spanish I for proficient 8th grade students;Full time Clinical Child Psychologist;One full time learning specialist;After-school activities offered (see further below);Varied sports programs offered (see further below);Extended care available on full school days until 5:45; and Our graduates enroll in an outstanding variety of public and private high schools. Afterschool Programs Although the Mason Prep School day officially ends at 3:05 p.m., many options are available for students after school. Extended Day Offered on a flexible as-needed basis, the Extended Day program provides a supervised environment until 5:45 p.m., with time for homework as well as for recreation. Homework help is also available in Study Hall sessions conducted by staff members. Afterschool Programs Mason Prep welcomes the opportunity to coordinate various afterschool programs with outstanding organizations and professionals. Our programs provide our students in every grade with opportunities to expand their horizons through the arts, athletics, culture, math, science, strategy and engineering. The participants also continue to develop skills in the areas of communication, participation, fair play and persistence as the different activities broaden the world around them. Athletics The Mason Prep faculty, staff, and coaches strive to develop the whole child, and our athletic program plays a significant part in this effort. Our program is designed to teach basic fundamental skills and then build on those skills at appropriate age levels. Fundamental skills and strategies in several sports can be mastered in the eight years at Mason Prep, and athletes who continue through the middle school years can make an easy transition to high school sports. Mason Prep athletes also learn the meaning of hard work, integrity, responsibility, commitment, and sportsmanship - critically important traits for each athlete to take to the next level of sport and into adulthood. Mason Preps teams typically involve grades 4 - 8. We play area schools, giving our children an opportunity to make new friends through sport. Volleyball (girls) - Mason Prep fielded three volleyball teams for girls in Grades 5-8. The volleyball season runs from September to mid-October, with games played through the City of Charleston Recreational Volleyball League.Basketball (girls and boys) - The basketball program runs from mid-October through early February. Tennis (girls and boys, grades 4-8) - Tennis season takes place in the spring with competitions through the Charleston Tennis Center. Developmental Sports Before students enter a competitive arena, developmental teams are offered in basketball in grades K - 3. These teams participate in intramural sessions with volunteer parent coaches. Rather than a win/loss record, each individual's performing to the best of his or her ability and development of fundamental skills are the Mason Prep measures of success.</Desc>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Stephanie Pierce</PersonNm>
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        <EOYAmt>10628558</EOYAmt>
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        <EOYAmt>16992510</EOYAmt>
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      <InfoInScheduleOPartXIInd>X</InfoInScheduleOPartXIInd>
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      <NetUnrlzdGainsLossesInvstAmt>90070</NetUnrlzdGainsLossesInvstAmt>
      <OtherChangesInNetAssetsAmt>-4067</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
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      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
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      <SchoolInd>X</SchoolInd>
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      <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>
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        <InvestmentEarningsOrLossesAmt>44153</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>-2950</OtherExpendituresAmt>
        <EndYearBalanceAmt>492710</EndYearBalanceAmt>
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      <CYMinus1YrEndwmtFundGrp>
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        <InvestmentEarningsOrLossesAmt>86852</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>-12487</OtherExpendituresAmt>
        <EndYearBalanceAmt>451507</EndYearBalanceAmt>
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        <BeginningYearBalanceAmt>378388</BeginningYearBalanceAmt>
        <InvestmentEarningsOrLossesAmt>10154</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>-11400</OtherExpendituresAmt>
        <EndYearBalanceAmt>377142</EndYearBalanceAmt>
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      <CYMinus3YrEndwmtFundGrp>
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        <InvestmentEarningsOrLossesAmt>-79728</InvestmentEarningsOrLossesAmt>
        <OtherExpendituresAmt>-11401</OtherExpendituresAmt>
        <EndYearBalanceAmt>378388</EndYearBalanceAmt>
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        <OtherExpendituresAmt>-14439</OtherExpendituresAmt>
        <EndYearBalanceAmt>469517</EndYearBalanceAmt>
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      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
      <LandGrp>
        <OtherCostOrOtherBasisAmt>994979</OtherCostOrOtherBasisAmt>
        <BookValueAmt>994979</BookValueAmt>
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      <BuildingsGrp>
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        <DepreciationAmt>4674792</DepreciationAmt>
        <BookValueAmt>4810469</BookValueAmt>
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      <EquipmentGrp>
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        <DepreciationAmt>1707955</DepreciationAmt>
        <BookValueAmt>195103</BookValueAmt>
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      <OtherLandBuildingsGrp>
        <OtherCostOrOtherBasisAmt>1283745</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>484145</DepreciationAmt>
        <BookValueAmt>799600</BookValueAmt>
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      <OtherLiabilitiesOrgGrp>
        <Desc>Operating Lease</Desc>
        <Amt>81634</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>81634</TotalLiabilityAmt>
      <TotalRevEtcAuditedFinclStmtAmt>6691002</TotalRevEtcAuditedFinclStmtAmt>
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      <RevenueNotReportedAmt>90070</RevenueNotReportedAmt>
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      <RevenueNotReportedFinclStmtAmt>102247</RevenueNotReportedFinclStmtAmt>
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      <ExpensesNotReportedAmt>4067</ExpensesNotReportedAmt>
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      <ExpensesNotRptFinclStmtAmt>102247</ExpensesNotRptFinclStmtAmt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part V, Line 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>To support scholarships, programs and other School activities.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XI, Line 4b - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Financial aid 83,210. Investment management fees, net per audit 19,037.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XII, Line 2d - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Bad debts 4,067.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XII, Line 4b - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Financial aid 83,210. Investment management fees, net per audit 19,037.</ExplanationTxt>
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      <PolicyStmtInBrochuresEtcInd>1</PolicyStmtInBrochuresEtcInd>
      <PlcyPblczdViaBroadcastMediaInd>1</PlcyPblczdViaBroadcastMediaInd>
      <MaintainRacialCompRecsInd>1</MaintainRacialCompRecsInd>
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      <MaintainCpyOfAllSolInd>1</MaintainCpyOfAllSolInd>
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      <DiscriminateRaceAdmissPlcyInd>0</DiscriminateRaceAdmissPlcyInd>
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        <FormAndLineReferenceDesc>Schedule E, Part I, Line 3</FormAndLineReferenceDesc>
        <ExplanationTxt>Mason Preparatory School publishes its nondiscrimination policies in various ads and publications. Mason Preparatory School accepts qualified students and follows a policy of non-discrimination as to race, sex, color, religion, and national or ethnic origin. Mason Preparatory School seeks a student population that is diverse in various ways.</ExplanationTxt>
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        <CharitableContriEvent1Amt>86220</CharitableContriEvent1Amt>
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        <FoodAndBeverageTotalEventsAmt>9485</FoodAndBeverageTotalEventsAmt>
        <EntertainmentTotalEventsAmt>500</EntertainmentTotalEventsAmt>
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        <RecipientCnt>26</RecipientCnt>
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        <FormAndLineReferenceDesc>Part I, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>Mason Preparatory School offers financial assistance to our students based on demonstrated financial need. We realize that sending your child to an independent school requires a great financial commitment, and we deeply appreciate our parents placing their trust in Mason Prep for their children's education. Our administration and Board of Trustees are committed to maintaining Mason Prep's affordability for our current families and to making Mason Prep more accessible to new families. Mason Prep uses the School and Student Services (SSS) program sponsored by the National Association of Independent Schools (NAIS) to manage the application process in a fair, consistent and confidential manner.</ExplanationTxt>
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      <Form990OfOtherOrganizationsInd>X</Form990OfOtherOrganizationsInd>
      <WrittenEmploymentContractInd>X</WrittenEmploymentContractInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
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      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>0</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>0</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>0</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>0</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>0</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Jennifer Baker</PersonNm>
        <TitleTxt>Head of School</TitleTxt>
        <BaseCompensationFilingOrgAmt>155684</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>0</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>0</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>4605</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>7057</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>167346</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
    </IRS990ScheduleJ>
    <IRS990ScheduleK documentId="RetDoc1053100001">
      <TaxExemptBondsIssuesGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <IssuerName>
          <BusinessNameLine1Txt>Economic Development Authority Bonds</BusinessNameLine1Txt>
        </IssuerName>
        <BondIssuedDt>2016-10-28</BondIssuedDt>
        <IssuePriceAmt>6930000</IssuePriceAmt>
        <PurposeDesc>School construction</PurposeDesc>
        <DefeasedInd>0</DefeasedInd>
        <OnBehalfOfIssuerInd>0</OnBehalfOfIssuerInd>
        <PoolFinancingInd>0</PoolFinancingInd>
      </TaxExemptBondsIssuesGrp>
      <TaxExemptBondsProceedsGrp>
        <BondReferenceCd>A</BondReferenceCd>
        <SubstantialCompletionYr>2016</SubstantialCompletionYr>
        <RefundingTaxExemptBondsInd>0</RefundingTaxExemptBondsInd>
        <RefundingTaxableBondsInd>0</RefundingTaxableBondsInd>
        <FinalAllocationMadeInd>0</FinalAllocationMadeInd>
        <AdequateBooksAndRecMaintInd>0</AdequateBooksAndRecMaintInd>
      </TaxExemptBondsProceedsGrp>
      <TaxExemptBondsPrivateBusUseGrp>
        <BondReferenceCd>A</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>1</RebateNotDueYetInd>
        <ExceptionToRebateInd>0</ExceptionToRebateInd>
        <NoRebateDueInd>0</NoRebateDueInd>
        <VariableRateIssueInd>0</VariableRateIssueInd>
        <HedgeIdentifiedInBksAndRecInd>0</HedgeIdentifiedInBksAndRecInd>
        <GrossProceedsInvestedInGICInd>0</GrossProceedsInvestedInGICInd>
        <GrossProceedsInvestedInd>0</GrossProceedsInvestedInd>
        <WrittenProcToMonitorReqsInd>0</WrittenProcToMonitorReqsInd>
      </TaxExemptBondsArbitrageGrp>
    </IRS990ScheduleK>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Form 990 is reviewed by management. Once all comments are addressed, the Form 990 is provided to the board for review and comment period. Once this is complete, and all questions properly addressed, the Form 990 is efiled.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>Annually, new board members are required to disclosure any possibleconflict of interest to the Board. Thereafter, the members are required tocommunicate any changes in this status.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>These decisions are made by the Board of Directors through an evaluation ofthird-party information, salary surveys and other information.These decisions are made by the Board of Directors through an evaluation ofthird-party information, salary surveys and other information.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>Documents are made available for inspection upon request in the School's main office.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XI, line 9:</FormAndLineReferenceDesc>
        <ExplanationTxt>Bad debts -4,067.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>