Liabilities / Assets
79th percentile
Higher debt load relative to assets than 79% of similar nonprofits.
Precomputed percentiles for this filing year versus similar nonprofits in the same peer cohort.
Liabilities / Assets
79th percentile
Higher debt load relative to assets than 79% of similar nonprofits.
Liabilities / Revenue
80th percentile
Higher debt load relative to revenue than 80% of similar nonprofits.
Net Margin
69th percentile
Higher net margin than 69% of similar nonprofits.
Top Officer Pay
Score unavailable
This filing does not contain officer compensation rows.
Asset Growth
88th percentile
Faster asset growth than 88% of similar nonprofits.
Revenue Growth
29th percentile
Faster revenue growth than 29% of similar nonprofits.
Assets
Up$5,943,386
Up $1,339,751 (+29%) from 2017
Net Assets
Up$2,522,497
Up $458,053 (+22%) from 2017
Liabilities
Up$3,420,889
Up $881,698 (+35%) from 2017
Revenue
Down$4,063,295
Down $136,659 (-3.3%) from 2017
Expenses
Up$3,602,065
Up $965,996 (+37%) from 2017
Net Income
Down$461,230
Down $1,102,655 (-71%) from 2017
Proof school offers a transformative liberal arts education to young people with an active curiosity and a passion for mathematics, equipping them to reason, communicate, and positively impact their world.
Offering a liberal arts education for kids who love math, reasoning and communication.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Rtn Earn Endowment Incm Other Fnds | $2,064,444 | $2,522,497 | ▲ $458,053 |
| Land, Buildings, and Equipment, Net | $596,395 | $2,415,952 | ▲ $1,819,557 |
| Accounts Receivable | $1,337,055 | $1,655,220 | ▲ $318,165 |
| Cash and Non-Interest-Bearing Accounts | $1,740,192 | $900,550 | ▼ $839,642 |
| Investments in Publicly Traded Securities | $259,433 | $356,873 | ▲ $97,440 |
| Loans From Officers Directors | $0 | $200,000 | ▲ $200,000 |
| Prepaid Expenses and Deferred Charges | $60,560 | $31,271 | ▼ $29,289 |
| Pd in Cap Srpls Land Bldg Eqp Fund | $0 | $0 | → $0 |
| Cap Stk Tr Prin Current Funds | $0 | $0 | → $0 |
| Total Assets | $4,603,635 | $5,943,386 | ▲ $1,339,751 |
| Other Assets Total | $610,000 | $583,520 | ▼ $26,480 |
| Liabilities | |||
| Deferred Revenue | $2,317,413 | $2,816,638 | ▲ $499,225 |
| Other Liabilities | $163,244 | $336,026 | ▲ $172,782 |
| Accounts Payable and Accrued Expenses | $58,534 | $68,225 | ▲ $9,691 |
| Total Liabilities | $2,539,191 | $3,420,889 | ▲ $881,698 |
| Net Assets / Fund Balance | |||
| Total Net Assets Fund Balance | $2,064,444 | $2,522,497 | ▲ $458,053 |
| Total Liabilities and Net Assets / Fund Balance | $4,603,635 | $5,943,386 | ▲ $1,339,751 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Other Land Buildings | $2,415,952 | - | $2,415,952 |
| Equipment | $0 | $1,050 | $1,050 |
| Other Assets Org | $583,520 | - | - |
| Name | Title | Full / Part Time | Base | Other | Total |
|---|---|---|---|---|---|
| Zachary Sifuentes | Dean of Humanities | FT | $169,740 | $16,875 | $186,615 |
| Samuel K Vandervelde | Head of School | FT | $155,589 | $18,780 | $174,369 |
| Yeuwhai Lin | Director of Admissions | FT | $127,447 | $3,846 | $131,293 |
| Name | Title |
|---|---|
| Paul Zeitz | Board Chair |
| Alon Amit | Board Member |
| Diviya Magaro | Board Member |
| James Sotiros | Board Member |
| Perry Tam | Board Member |
| Ravi Vakil | Board Member |
| Dennis Leary | Treasurer |
| Contribution Type | Contribution Count | Reported Amount | Valuation Method |
|---|---|---|---|
| Securities Publicly Traded | 9 | $93,448 | Fair Market Value |
| Total Noncash Contributions | 9 | $93,448 | - |
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $1,552,792 |
| Other Expenses | $1,425,842 |
| Grants and Similar Amounts Paid | $623,431 |
| Total Fundraising Expense | $438 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Occupancy | $1,146,909 | $63,128 | - | $1,210,037 |
| Other Salaries and Wages | $774,076 | $48,298 | - | $822,374 |
| Grants to Domestic Individuals | $623,431 | - | - | $623,431 |
| Current Officers, Directors, Trustees, and Key Employees | $492,277 | - | - | $492,277 |
| Other Employee Benefits | $121,056 | $5,044 | - | $126,100 |
| Payroll Taxes | $89,484 | $3,729 | - | $93,213 |
| Insurance | $36,684 | - | - | $36,684 |
| Information Technology | $23,657 | - | - | $23,657 |
| Fees for Services Accounting | - | $22,348 | - | $22,348 |
| Pension Plan Contributions | $17,335 | $1,493 | - | $18,828 |
| Office Expenses | $8,085 | $6,011 | - | $14,096 |
| Fees for Services Legal | - | $6,721 | - | $6,721 |
| Conferences and Meetings | $3,410 | - | - | $3,410 |
| Other Expenses | $3,179 | - | - | $3,179 |
| Advertising | - | - | $438 | $438 |
| Total Functional Expenses | $3,444,855 | $156,772 | $438 | $3,602,065 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
| Line Item | Beginning | End | Change |
|---|---|---|---|
| Loans from Officers, Directors, Trustees, and Key Employees | $0 | $200,000 | ▲ $200,000 |
| Liability | Amount |
|---|---|
| Deferred Rent | $336,026 |
“The school will electronically distribute the completed form 990, including any supplemental schedules, to each member of the board of directors (named in part vii section a) before filing. The board will then approve the form 990 via a formal vote.”
“All employees of proof school sign an agreement to observe the conflict of interest policy stated in our employee handbook. Determination and review of conflicts of interest are made by the school leadership team, overseen by the head of school. Such determinations are made initially at the time of hire, and subsequently monitored through an annual review of handbook policies each august, requests for personal time during the year, and informal conversations. No conflicts of interest have been identified to date.”
“Non-compensated board members approves the head of school salary, who in turn sets and publishes internally a compensation scale and promotion policy for all employees. Amounts are based on salaries at comparison schools in our region.”
“Documents may be requested by contacting the head of school, who makes decisions regarding their distribution on a case-by-case basis.”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 58534 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 68225 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 1337055 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 1655220 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | OFFERING A LIBERAL ARTS EDUCATION FOR KIDS WHO LOVE MATH, REASONING AND COMMUNICATION. |
| IRS990/AddressChangeInd | 0 | X |
| IRS990/AdvertisingGrp/FundraisingAmt | 0 | 438 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 438 |
| IRS990/AllOtherContributionsAmt | 0 | 1054733 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | SAMUEL K VANDERVELDE |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 4154265700 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 973 MISSION STREET |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | SAN FRANCISCO |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 94103 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOfficerEntInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CapStkTrPrinCurrentFundsGrp/BOYAmt | 0 | 0 |
| IRS990/CapStkTrPrinCurrentFundsGrp/EOYAmt | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 1740192 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 900550 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 492277 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 492277 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 1 |
| IRS990/ConferencesMeetingsGrp/ProgramServicesAmt | 0 | 3410 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 3410 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 1054733 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 623431 |
| IRS990/CYInvestmentIncomeAmt | 0 | 4011 |
| IRS990/CYOtherExpensesAmt | 0 | 1425842 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 3004551 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 461230 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 1552792 |
| IRS990/CYTotalExpensesAmt | 0 | 3602065 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 438 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 4063295 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 1 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 2317413 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 2816638 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/Desc | 0 | PROOF SCHOOL PROVIDES A COMPLETE LIBERAL ARTS EDUCATION FOR KIDS IN MIDDLE AND HIGH SCHOOL WHO LOVE MATH. DURING THE 2017-18 ACADEMIC/FISCAL YEAR THE SCHOOL ENROLLED 78 STUDENTS IN GRADES SIX THROUGH ELEVEN. THE SCHOOL EMPLOYED TEN FULL-TIME TEACHERS, THREE TEACHER-ADMINISTRATORS, ONE INTERN, ONE PART-YEAR TEACHER, AND ONE NON-ACADEMIC STAFF PERSON. PROOF SCHOOL PROVIDED SERVICES AND CONDUCTED OPERATIONS IN A MANNER COMMON TO MOST PRIVATE SCHOOLS. THIS INCLUDED TEACHING A FULL RANGE OF CLASSES, RUNNING ADMISSIONS, GENERATING TRANSCRIPTS, RAISING FUNDS, TRACKING ATTENDANCE, AND SO FORTH. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 17 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 3444855 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 22348 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 22348 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 6721 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 6721 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/KeyEmployeeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 18780 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 16875 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 3846 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | PAUL ZEITZ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | DENNIS LEARY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | ALON AMIT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | DIVIYA MAGARO |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | JAMES SOTIROS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | PERRY TAM |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | RAVI VAKIL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | SAMUEL K VANDERVELDE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | ZACHARY SIFUENTES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | YEUWHAI LIN |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 155589 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 169740 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 127447 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | BOARD CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | HEAD OF SCHOOL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | DEAN OF HUMANITIES |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | DIRECTOR OF ADMISSIONS |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/Form990TFiledInd | 0 | 1 |
| IRS990/FormationYr | 0 | 2013 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedInd | 0 | 0 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 0 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 8 |
| IRS990/GrantAmt | 0 | 623431 |
| IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt | 0 | 623431 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 623431 |
| IRS990/GrantsToIndividualsInd | 0 | 1 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 93448 |
| IRS990/GrossReceiptsAmt | 0 | 4156743 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 6 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 3 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 23657 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 23657 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 36684 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 36684 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 4011 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 4011 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 259433 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 356873 |
| IRS990/IRPDocumentCnt | 0 | 9 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 1050 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 596395 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 2415952 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 2417002 |
| IRS990/LegalDomicileStateCd | 0 | CA |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 93448 |
| IRS990/LoanOutstandingInd | 0 | 1 |
| IRS990/LoansFromOfficersDirectorsGrp/BOYAmt | 0 | 0 |
| IRS990/LoansFromOfficersDirectorsGrp/EOYAmt | 0 | 200000 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | PROOF SCHOOL OFFERS A TRANSFORMATIVE LIBERAL ARTS EDUCATION TO YOUNG PEOPLE WITH AN ACTIVE CURIOSITY AND A PASSION FOR MATHEMATICS, EQUIPPING THEM TO REASON, COMMUNICATE, AND POSITIVELY IMPACT THEIR WORLD. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 2064444 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 2522497 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 13246 |
| IRS990/NoncashContributionsAmt | 0 | 93448 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 63128 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 1146909 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 1210037 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 6011 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 8085 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 14096 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrgDoesNotFollowSFAS117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 610000 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 583520 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 5044 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 121056 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 126100 |
| IRS990/OtherExpensesGrp/Desc | 0 | SCHOOL PROGRAMS AND ACT |
| IRS990/OtherExpensesGrp/Desc | 1 | CURRICULAR EXPENSES |
| IRS990/OtherExpensesGrp/Desc | 2 | ADMISSIONS & OUTREACH |
| IRS990/OtherExpensesGrp/Desc | 3 | RECRUITMENT |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 76842 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 23300 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 5130 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 3179 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 76842 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 23300 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 5130 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 3179 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 163244 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 336026 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 48298 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 774076 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 822374 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 3729 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 89484 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 93213 |
| IRS990/PdInCapSrplsLandBldgEqpFundGrp/BOYAmt | 0 | 0 |
| IRS990/PdInCapSrplsLandBldgEqpFundGrp/EOYAmt | 0 | 0 |
| IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt | 0 | 1493 |
| IRS990/PensionPlanContributionsGrp/ProgramServicesAmt | 0 | 17335 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 18828 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 60560 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 31271 |
| IRS990/PrincipalOfficerNm | 0 | SAMUEL VANDERVELDE |
| IRS990/PriorPeriodAdjustmentsAmt | 0 | -3177 |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 611600 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 1 | 611710 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 2 | 611710 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 3 | 611710 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 4 | 611710 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | TUITION |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | LUNCH INCOME |
| IRS990/ProgramServiceRevenueGrp/Desc | 2 | MANDELBROT COMPETITION |
| IRS990/ProgramServiceRevenueGrp/Desc | 3 | FIELD TRIP FEES |
| IRS990/ProgramServiceRevenueGrp/Desc | 4 | PARENT ASSOCIATION FEE |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 2939445 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 1 | 37425 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 2 | 12292 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 3 | 12150 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 4 | 2190 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 2939445 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 37425 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 2 | 12292 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 3 | 12150 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 4 | 2190 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 2071279 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 492325 |
| IRS990/PYInvestmentIncomeAmt | 0 | 1613 |
| IRS990/PYOtherExpensesAmt | 0 | 834371 |
| IRS990/PYOtherRevenueAmt | 0 | 220 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 2126842 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 1563885 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 1309373 |
| IRS990/PYTotalExpensesAmt | 0 | 2636069 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 4199954 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 461230 |
| IRS990/RegularMonitoringEnfrcInd | 0 | 1 |
| IRS990/RelatedEntityInd | 0 | 0 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 1 |
| IRS990/ReportOtherAssetsInd | 0 | 1 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 1 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/RevenueAmt | 0 | 3004551 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/BOYAmt | 0 | 2064444 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/EOYAmt | 0 | 2522497 |
| IRS990ScheduleA/SchoolInd | 0 | X |
| IRS990/ScheduleBRequiredInd | 0 | 1 |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 0 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 1050 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 1050 |
| IRS990ScheduleD/OtherAssetsOrgGrp/BookValueAmt | 0 | 583520 |
| IRS990ScheduleD/OtherAssetsOrgGrp/Desc | 0 | SECURITY DEPOSITS |
| IRS990ScheduleD/OtherLandBuildingsGrp/BookValueAmt | 0 | 2415952 |
| IRS990ScheduleD/OtherLandBuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 2415952 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 0 | 336026 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 0 | DEFERRED RENT |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 2415952 |
| IRS990ScheduleD/TotalBookValueOtherAssetsAmt | 0 | 583520 |
| IRS990ScheduleD/TotalLiabilityAmt | 0 | 336026 |
| IRS990ScheduleE/ComplianceWithRevProc7550Ind | 0 | 1 |
| IRS990ScheduleE/DiscriminateRaceAdmissPlcyInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceAthltProgInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceEducPlcyInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceEmplmFcultyInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceOtherActyInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceSchsInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceStdntsRghtsInd | 0 | 0 |
| IRS990ScheduleE/DiscriminateRaceUseOfFcltsInd | 0 | 0 |
| IRS990ScheduleE/GovernmentFinancialAidRcvdInd | 0 | 0 |
| IRS990ScheduleE/GovernmentFinancialAidRvkdInd | 0 | 0 |
| IRS990ScheduleE/MaintainCpyOfAllSolInd | 0 | 1 |
| IRS990ScheduleE/MaintainCpyOfBrochuresEtcInd | 0 | 1 |
| IRS990ScheduleE/MaintainRacialCompRecsInd | 0 | 1 |
| IRS990ScheduleE/MaintainScholarshipsRecsInd | 0 | 1 |
| IRS990ScheduleE/NondiscriminatoryPolicyStmtInd | 0 | 1 |
| IRS990ScheduleE/PlcyPblczdViaBroadcastMediaInd | 0 | 0 |
| IRS990ScheduleE/PolicyStmtInBrochuresEtcInd | 0 | 1 |
| IRS990ScheduleE/SupplementalInformationDetail/ExplanationTxt | 0 | PROOF SCHOOL DOES NOT SOLICIT APPLICATIONS VIA NEWSPAPER OR BROADCAST MEDIA. OUR COMPREHENSIVE RACIAL NONDISCRIMINATION POLICY APPEARS AT THE PROOF SCHOOL WEBSITE ON THE PAGE CONTAINING INFORMATION ON ADMISSIONS. IT IS ALSO CLEARLY DISPLAYED ON ALL APPLICATION MATERIALS THAT ARE COMPLETED BY FAMILIES IN THE PROCESS OF APPLYING TO PROOF SCHOOL. |
| IRS990ScheduleE/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | SCHEDULE E, PART I, LINE 3 |
| IRS990ScheduleI/GrantRecordsMaintainedInd | 0 | 1 |
| IRS990ScheduleI/GrantsOtherAsstToIndivInUSGrp/CashGrantAmt | 0 | 623431 |
| IRS990ScheduleI/GrantsOtherAsstToIndivInUSGrp/GrantTypeTxt | 0 | FINANCIAL ASSISTANCE |
| IRS990ScheduleI/GrantsOtherAsstToIndivInUSGrp/RecipientCnt | 0 | 23 |
| IRS990ScheduleI/SupplementalInformationDetail/ExplanationTxt | 0 | ALL FAMILIES HAVE THE OPTION OF APPLYING FOR FINANCIAL ASSISTANCE (FA) AT THE SAME TIME THAT THEY APPLY FOR ADMISSION TO PROOF SCHOOL. THE FA PROCESS IS HANDLED BY SSS, AN INDEPENDENT SERVICE USED BY MANY SCHOOLS TO DETERMINE FINANCIAL ASSISTANCE AWARD AMOUNTS. ONCE A STUDENT IS ADMITTED, OUR FA COMMITTEE USES INFORMATION PROVIDED BY SSS AND BY THE FAMILY IN ORDER TO MAKE FINAL AWARD DETERMINATIONS, WHICH ARE SHARED IN THE ENROLLMENT AGREEMENT. ALL RECORDS RELATED TO FA ARE KEPT ELECTRONICALLY, BOTH VIA SSS AND INTERNALLY. |
| IRS990ScheduleI/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | PART I, LINE 2: |
| IRS990ScheduleJ/AnyNonFixedPaymentsInd | 0 | 0 |
| IRS990ScheduleJ/BoardOrCommitteeApprovalInd | 0 | X |
| IRS990ScheduleJ/CompBasedOnRevenueOfFlngOrgInd | 0 | 0 |
| IRS990ScheduleJ/CompBsdNetEarnsFlngOrgInd | 0 | 0 |
| IRS990ScheduleJ/CompBsdNetEarnsRltdOrgsInd | 0 | 0 |
| IRS990ScheduleJ/CompBsdOnRevRelatedOrgsInd | 0 | 0 |
| IRS990ScheduleJ/CompensationSurveyInd | 0 | X |
| IRS990ScheduleJ/EquityBasedCompArrngmInd | 0 | 0 |
| IRS990ScheduleJ/InitialContractExceptionInd | 0 | 0 |
| IRS990/ScheduleJRequiredInd | 0 | 1 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BaseCompensationFilingOrgAmt | 0 | 155589 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BaseCompensationFilingOrgAmt | 1 | 169740 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusFilingOrganizationAmount | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusFilingOrganizationAmount | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusRelatedOrganizationsAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusRelatedOrganizationsAmt | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompensationBasedOnRltdOrgsAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompensationBasedOnRltdOrgsAmt | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompReportPrior990FilingOrgAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompReportPrior990FilingOrgAmt | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompReportPrior990RltdOrgsAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompReportPrior990RltdOrgsAmt | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/DeferredCompensationFlngOrgAmt | 0 | 4868 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/DeferredCompensationFlngOrgAmt | 1 | 5243 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/DeferredCompRltdOrgsAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/DeferredCompRltdOrgsAmt | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/NontaxableBenefitsFilingOrgAmt | 0 | 13912 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/NontaxableBenefitsFilingOrgAmt | 1 | 11632 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/NontaxableBenefitsRltdOrgsAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/NontaxableBenefitsRltdOrgsAmt | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/OtherCompensationFilingOrgAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/OtherCompensationFilingOrgAmt | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/OtherCompensationRltdOrgsAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/OtherCompensationRltdOrgsAmt | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/PersonNm | 0 | SAMUEL K VANDERVELDE |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/PersonNm | 1 | ZACHARY SIFUENTES |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TitleTxt | 0 | HEAD OF SCHOOL |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TitleTxt | 1 | DEAN OF HUMANITIES |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TotalCompensationFilingOrgAmt | 0 | 174369 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TotalCompensationFilingOrgAmt | 1 | 186615 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TotalCompensationRltdOrgsAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TotalCompensationRltdOrgsAmt | 1 | 0 |
| IRS990ScheduleJ/SeverancePaymentInd | 0 | 0 |
| IRS990ScheduleJ/SupplementalNonqualRtrPlanInd | 0 | 0 |
| IRS990ScheduleL/LoansBtwnOrgInterestedPrsnGrp/BalanceDueAmt | 0 | 200000 |
| IRS990ScheduleL/LoansBtwnOrgInterestedPrsnGrp/BoardOrCommitteeApprovalInd | 0 | 1 |
| IRS990ScheduleL/LoansBtwnOrgInterestedPrsnGrp/DefaultInd | 0 | 0 |
| IRS990ScheduleL/LoansBtwnOrgInterestedPrsnGrp/LoanPurposeTxt | 0 | FUNDS FOR NEW FACILITY |
| IRS990ScheduleL/LoansBtwnOrgInterestedPrsnGrp/LoanToOrganizationInd | 0 | X |
| IRS990ScheduleL/LoansBtwnOrgInterestedPrsnGrp/OriginalPrincipalAmt | 0 | 200000 |
| IRS990ScheduleL/LoansBtwnOrgInterestedPrsnGrp/PersonNm | 0 | DIVIYA MAGARO |
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Displayed year
2018 • Form 990Detailed filing. Detailed filing data is available for this year.