Liabilities / Assets
81st percentile
Higher debt load relative to assets than 81% of similar nonprofits.
Precomputed percentiles for this filing year versus similar nonprofits in the same peer cohort.
Liabilities / Assets
81st percentile
Higher debt load relative to assets than 81% of similar nonprofits.
Liabilities / Revenue
79th percentile
Higher debt load relative to revenue than 79% of similar nonprofits.
Net Margin
53rd percentile
Higher net margin than 53% of similar nonprofits.
Top Officer Pay
86th percentile
Higher top officer pay than 86% of similar nonprofits.
Top officer pay equals 4.2% of source-year revenue.
Asset Growth
48th percentile
Faster asset growth than 48% of similar nonprofits.
Revenue Growth
56th percentile
Faster revenue growth than 56% of similar nonprofits.
Assets
Up$8,538,948
Up $695,988 (+8.9%) from 2020
Net Assets
Up$3,980,678
Up $876,668 (+28%) from 2020
Liabilities
Down$4,558,270
Down $180,680 (-3.8%) from 2020
Revenue
Up$6,171,169
Up $863,258 (+16%) from 2020
Expenses
Up$5,294,974
Up $362,488 (+7.3%) from 2020
Net Income
Up$876,195
Up $500,770 (+133%) from 2020
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 | $3,104,010 | $3,980,678 | ▲ $876,668 |
| Cash and Non-Interest-Bearing Accounts | $2,199,980 | $3,042,416 | ▲ $842,436 |
| Accounts Receivable | $2,418,671 | $2,382,847 | ▼ $35,824 |
| Land, Buildings, and Equipment, Net | $2,208,138 | $1,959,280 | ▼ $248,858 |
| Investments in Publicly Traded Securities | $611,175 | $818,651 | ▲ $207,476 |
| Prepaid Expenses and Deferred Charges | $32,814 | $32,972 | ▲ $158 |
| Pd in Cap Srpls Land Bldg Eqp Fund | $0 | $0 | → $0 |
| Cap Stk Tr Prin Current Funds | $0 | $0 | → $0 |
| Total Assets | $7,842,960 | $8,538,948 | ▲ $695,988 |
| Other Assets Total | $372,182 | $302,782 | ▼ $69,400 |
| Liabilities | |||
| Deferred Revenue | $4,016,990 | $4,144,930 | ▲ $127,940 |
| Other Liabilities | $342,054 | $380,892 | ▲ $38,838 |
| Unsecured Notes Loans Payable | $368,800 | $0 | ▼ $368,800 |
| Accounts Payable and Accrued Expenses | $11,106 | $32,448 | ▲ $21,342 |
| Total Liabilities | $4,738,950 | $4,558,270 | ▼ $180,680 |
| Net Assets / Fund Balance | |||
| Total Net Assets Fund Balance | $3,104,010 | $3,980,678 | ▲ $876,668 |
| Total Liabilities and Net Assets / Fund Balance | $7,842,960 | $8,538,948 | ▲ $695,988 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Leasehold Improvements | $1,939,436 | $799,775 | $2,739,211 |
| Equipment | $19,844 | $37,344 | $57,188 |
| Name | Title | Full / Part Time | Base | Other | Total |
|---|---|---|---|---|---|
| Samuel K Vandervelde | Head of School | FT | $225,899 | $34,964 | $260,863 |
| Zachary Sifuentes | Dean of Humanities | FT | $191,331 | $29,260 | $220,591 |
| Kathy Lin | Director of Admissions | FT | $199,063 | $6,787 | $205,850 |
| Jason Horowitz | Math & Science Teacher | FT | $102,092 | $12,487 | $114,579 |
| Name | Title |
|---|---|
| Paul Zeitz | Board Chair |
| Alon Amit | Board Member |
| Ana Brubaker | Board Member |
| Diviya Magaro | Board Member |
| James Sotiros | Board Member |
| Lisa Park | Board Member |
| Perry Tam | Board Member |
| Ravi Vakil | Board Member |
| Susan Athey | Board Member |
| Dennis Leary | Treasurer |
| Contribution Type | Contribution Count | Reported Amount | Valuation Method |
|---|---|---|---|
| Securities Publicly Traded | 6 | $206,755 | Fair Market Value |
| Total Noncash Contributions | 6 | $206,755 | - |
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $2,726,895 |
| Other Expenses | $1,409,474 |
| Grants and Similar Amounts Paid | $1,158,605 |
| Total Fundraising Expense | $1,809 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $1,486,041 | $149,626 | - | $1,635,667 |
| Grants to Domestic Individuals | $1,158,605 | - | - | $1,158,605 |
| Occupancy | $675,422 | $190,503 | - | $865,925 |
| Current Officers, Directors, Trustees, and Key Employees | $718,862 | - | - | $718,862 |
| Depreciation Depletion | $223,728 | $63,103 | - | $286,831 |
| Other Employee Benefits | $158,594 | $52,739 | - | $211,333 |
| Payroll Taxes | $149,960 | $11,073 | - | $161,033 |
| Interest | $39,757 | $11,213 | - | $50,970 |
| Office Expenses | $32,370 | $7,139 | $598 | $40,107 |
| Information Technology | $25,559 | $5,943 | - | $31,502 |
| Insurance | $11,267 | $17,032 | - | $28,299 |
| Other Expenses | $16,182 | - | - | $16,182 |
| Fees for Services Accounting | $10,162 | $2,866 | - | $13,028 |
| All Other Expenses | $1,070 | - | $1,211 | $2,281 |
| Fees for Services Legal | $1,262 | - | - | $1,262 |
| Total Functional Expenses | $4,781,928 | $511,237 | $1,809 | $5,294,974 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
| Liability | Amount |
|---|---|
| Deferred Rent | $380,892 |
“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 | 11106 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 32448 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 2418671 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 2382847 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | OFFERING A LIBERAL ARTS EDUCATION FOR KIDS WHO LOVE MATH, REASONING AND COMMUNICATION. |
| IRS990/AllOtherContributionsAmt | 0 | 662657 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 1211 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 1070 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 2281 |
| 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/BusinessRlnWith35CtrlEntInd | 0 | 0 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CapStkTrPrinCurrentFundsGrp/BOYAmt | 0 | 0 |
| IRS990/CapStkTrPrinCurrentFundsGrp/EOYAmt | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 2199980 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 3042416 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 718862 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 718862 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 1 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 1031457 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 1158605 |
| IRS990/CYInvestmentIncomeAmt | 0 | 289 |
| IRS990/CYOtherExpensesAmt | 0 | 1409474 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 5139423 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 876195 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 2726895 |
| IRS990/CYTotalExpensesAmt | 0 | 5294974 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 1809 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 6171169 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 1 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 4016990 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 4144930 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 63103 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 223728 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 286831 |
| IRS990/Desc | 0 | PROOF SCHOOL DELIVERED A COMPREHENSIVE MIDDLE AND HIGH SCHOOL CURRICULUM TO A TOTAL OF 111 STUDENTS IN GRADES 6-12 DURING THE 2020-21 ACADEMIC YEAR. SCHOOL WAS IN SESSION (THOUGH HELD REMOTELY) FOR 172 DAYS; THE SCHOOL HELD INFO SESSIONS, RAN ADMISSIONS, HIRED FIVE NEW FACULTY, AND GRADUATED 11 STUDENTS. THE GOAL FOR THE SCHOOL CONTINUES TO BE TO PROVIDE A WORLD CLASS EDUCATION FOR STUDENTS IN THE BAY AREA WHO LOVE MATH. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 27 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 4781928 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 2866 |
| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 10162 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 13028 |
| IRS990/FeesForServicesLegalGrp/ProgramServicesAmt | 0 | 1262 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 1262 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 0.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 1 | 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/IndividualTrusteeOrDirectorInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/KeyEmployeeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 34964 |
| 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 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 11 | 29260 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 12 | 6787 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 13 | 12487 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | SAMUEL K VANDERVELDE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | PAUL ZEITZ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | DENNIS LEARY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | ALON AMIT |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | DIVIYA MAGARO |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | JAMES SOTIROS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | PERRY TAM |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | RAVI VAKIL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | ANA BRUBAKER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | LISA PARK |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | SUSAN ATHEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | ZACHARY SIFUENTES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | KATHY LIN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | JASON HOROWITZ |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 225899 |
| 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 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 11 | 191331 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 12 | 199063 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 13 | 102092 |
| 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/ReportableCompFromRltdOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | HEAD OF SCHOOL |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | BOARD CHAIR |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | TREASURER |
| 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 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | DEAN OF HUMANITIES |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | DIRECTOR OF ADMISSIONS |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | MATH & SCIENCE TEACHER |
| IRS990/Form990ProvidedToGvrnBodyInd | 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 | 11 |
| IRS990/GovernmentGrantsAmt | 0 | 368800 |
| IRS990/GrantAmt | 0 | 1158605 |
| IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt | 0 | 1158605 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 1158605 |
| IRS990/GrantsToIndividualsInd | 0 | 1 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 206755 |
| IRS990/GrossReceiptsAmt | 0 | 6377924 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 10 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 4 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 5943 |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 25559 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 31502 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 17032 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 11267 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 28299 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 11213 |
| IRS990/InterestGrp/ProgramServicesAmt | 0 | 39757 |
| IRS990/InterestGrp/TotalAmt | 0 | 50970 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 289 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 289 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 611175 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 818651 |
| IRS990/IRPDocumentCnt | 0 | 6 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 837119 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 2208138 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 1959280 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 2796399 |
| IRS990/LegalDomicileStateCd | 0 | CA |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 206755 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| 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 | 3104010 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 3980678 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 473 |
| IRS990/NoncashContributionsAmt | 0 | 206755 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 190503 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 675422 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 865925 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 598 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 7139 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 32370 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 40107 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrgDoesNotFollowFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 372182 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 302782 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 52739 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 158594 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 211333 |
| IRS990/OtherExpensesGrp/Desc | 0 | CURRICULAR EXPENSES |
| IRS990/OtherExpensesGrp/Desc | 1 | SCHOOL PROGRAMS AND ACT |
| IRS990/OtherExpensesGrp/Desc | 2 | RECRUITMENT |
| IRS990/OtherExpensesGrp/Desc | 3 | BAD DEBT EXPENSES |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 31467 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 25246 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 16374 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 16182 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 31467 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 25246 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 16374 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 16182 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 342054 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 380892 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 149626 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 1486041 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 1635667 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 11073 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 149960 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 161033 |
| IRS990/PdInCapSrplsLandBldgEqpFundGrp/BOYAmt | 0 | 0 |
| IRS990/PdInCapSrplsLandBldgEqpFundGrp/EOYAmt | 0 | 0 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 32814 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 32972 |
| IRS990/PrincipalOfficerNm | 0 | SAMUEL VANDERVELDE |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 611600 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 1 | 611710 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 2 | 611710 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | TUITION |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | FEE INCOME |
| IRS990/ProgramServiceRevenueGrp/Desc | 2 | PARENT ASSOCIATION FEE |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 5104300 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 1 | 28768 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 2 | 6355 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 5104300 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 28768 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 2 | 6355 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 614908 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 1061643 |
| IRS990/PYInvestmentIncomeAmt | 0 | 7852 |
| IRS990/PYOtherExpensesAmt | 0 | 1402187 |
| IRS990/PYOtherRevenueAmt | 0 | 2782 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 4682369 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 375425 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 2468656 |
| IRS990/PYTotalExpensesAmt | 0 | 4932486 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 5307911 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 876195 |
| IRS990/RegularMonitoringEnfrcInd | 0 | 1 |
| IRS990/RelatedEntityInd | 0 | 0 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 1 |
| IRS990/ReportOtherAssetsInd | 0 | 0 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 1 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/RevenueAmt | 0 | 5139423 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/BOYAmt | 0 | 3104010 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/EOYAmt | 0 | 3980678 |
| IRS990ScheduleA/SchoolInd | 0 | X |
| IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorNum | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine2 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/City | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/State | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCode | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt | 0 | RESTRICTED |
| IRS990/ScheduleBRequiredInd | 0 | 1 |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 19844 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 37344 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 57188 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/BookValueAmt | 0 | 1939436 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/DepreciationAmt | 0 | 799775 |
| IRS990ScheduleD/LeaseholdImprovementsGrp/OtherCostOrOtherBasisAmt | 0 | 2739211 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 0 | 380892 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 0 | DEFERRED RENT |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 1959280 |
| IRS990ScheduleD/TotalLiabilityAmt | 0 | 380892 |
| 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 | 1 |
| 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 | 1 |
| 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 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/ExplanationTxt | 1 | THE SCHOOL RECEIVED LOAN PROCEEDS UNDER THE PAYCHECK PROTECTION PROGRAM ESTABLISHED AS PART OF CARES ACT. |
| IRS990ScheduleE/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | SCHEDULE E, PART I, LINE 3 |
| IRS990ScheduleE/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | SCHEDULE E, PART I, LINE 6 |
| IRS990ScheduleI/GrantRecordsMaintainedInd | 0 | 1 |
| IRS990ScheduleI/GrantsOtherAsstToIndivInUSGrp/CashGrantAmt | 0 | 1158605 |
| IRS990ScheduleI/GrantsOtherAsstToIndivInUSGrp/GrantTypeTxt | 0 | FINANCIAL ASSISTANCE |
| IRS990ScheduleI/GrantsOtherAsstToIndivInUSGrp/RecipientCnt | 0 | 46 |
| 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 | 225899 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BaseCompensationFilingOrgAmt | 1 | 191331 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BaseCompensationFilingOrgAmt | 2 | 199063 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusFilingOrganizationAmount | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusFilingOrganizationAmount | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusFilingOrganizationAmount | 2 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusRelatedOrganizationsAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusRelatedOrganizationsAmt | 1 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BonusRelatedOrganizationsAmt | 2 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompensationBasedOnRltdOrgsAmt | 0 | 0 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/CompensationBasedOnRltdOrgsAmt | 1 | 0 |
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Displayed year
2021 • Form 990Detailed filing. Detailed filing data is available for this year.