Liabilities / Assets
85th percentile
Higher debt load relative to assets than 85% of similar nonprofits.
Precomputed percentiles for this filing year versus similar nonprofits in the same peer cohort.
Liabilities / Assets
85th percentile
Higher debt load relative to assets than 85% of similar nonprofits.
Liabilities / Revenue
88th percentile
Higher debt load relative to revenue than 88% of similar nonprofits.
Net Margin
95th percentile
Higher net margin than 95% of similar nonprofits.
Top Officer Pay
Score unavailable
This filing does not contain officer compensation rows.
Asset Growth
Score unavailable
No earlier valid filing was available within the previous three public years.
Revenue Growth
Score unavailable
No earlier valid filing was available within the previous three public years.
Assets
$1,508,229
No earlier filing loaded for comparison.
Net Assets
$457,298
No earlier filing loaded for comparison.
Liabilities
$1,050,931
No earlier filing loaded for comparison.
Revenue
$715,909
No earlier filing loaded for comparison.
Expenses
$261,847
No earlier filing loaded for comparison.
Net Income
$454,062
No earlier filing loaded for comparison.
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.
Proof School provides a full curriculum education for kids who love math in grades six through twelve. Proof School offers a transformative education to young people with a passion for and active curiosity about mathematics, broadly equipping them to reason, communicate, and positively impact their world.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Accounts Receivable | $0 | $694,021 | ▲ $694,021 |
| Cash and Non-Interest-Bearing Accounts | $2,940 | $565,518 | ▲ $562,578 |
| Rtn Earn Endowment Incm Other Fnds | $2,940 | $457,298 | ▲ $454,358 |
| Other Notes and Loans Receivable, Net | $0 | $246,570 | ▲ $246,570 |
| Land, Buildings, and Equipment, Net | $0 | $2,120 | ▲ $2,120 |
| Savings and Temporary Cash Investments | $0 | $0 | → $0 |
| Pledges and Grants Receivable | $0 | $0 | → $0 |
| Receivable From Disqualified Prsn | $0 | $0 | → $0 |
| Receivables From Officers Etc | $0 | - | - |
| Investments Other Securities | $0 | - | - |
| Investments Program Related | $0 | - | - |
| Investments in Publicly Traded Securities | $0 | - | - |
| Pd in Cap Srpls Land Bldg Eqp Fund | $0 | $0 | → $0 |
| Cap Stk Tr Prin Current Funds | $0 | $0 | → $0 |
| Intangible Assets | $0 | - | - |
| Inventories for Sale or Use | $0 | $0 | → $0 |
| Loans From Officers Directors | $0 | $0 | → $0 |
| Prepaid Expenses and Deferred Charges | $0 | - | - |
| Total Assets | $2,940 | $1,508,229 | ▲ $1,505,289 |
| Other Assets Total | $0 | - | - |
| Liabilities | |||
| Deferred Revenue | $0 | $1,048,420 | ▲ $1,048,420 |
| Accounts Payable and Accrued Expenses | $0 | $2,511 | ▲ $2,511 |
| Grants Payable | $0 | $0 | → $0 |
| Mortgage Notes Payable Secured by Investment Property | $0 | $0 | → $0 |
| Unsecured Notes Loans Payable | $0 | $0 | → $0 |
| Other Liabilities | $0 | $0 | → $0 |
| Escrow Account Liability | $0 | $0 | → $0 |
| Tax Exempt Bond Liabilities | $0 | $0 | → $0 |
| Total Liabilities | $0 | $1,050,931 | ▲ $1,050,931 |
| Net Assets / Fund Balance | |||
| Total Net Assets Fund Balance | $2,940 | $457,298 | ▲ $454,358 |
| Total Liabilities and Net Assets / Fund Balance | $2,940 | $1,508,229 | ▲ $1,505,289 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Equipment | $2,120 | $0 | $2,120 |
| Buildings | $0 | $0 | $0 |
| Other Land Buildings | $0 | $0 | $0 |
| Land | $0 | - | $0 |
| Leasehold Improvements | $0 | $0 | $0 |
| Name | Title | Full / Part Time | Base | Total |
|---|---|---|---|---|
| Zachary Sifuentes | Dean of Humanities | FT | $83,947 | $83,947 |
| Samuel K Vandervelde | Head of School | FT | $59,781 | $59,781 |
| Kathy Lin | Director of Community Outreach | FT | $43,531 | $43,531 |
| Name | Title |
|---|---|
| Paul Zeitz | Board Chair |
| Alon Amit | Board Member |
| Divya Magaro | Board Member |
| James Sotiros | Board Member |
| Ravi Vakil | Board Member |
| Dennis Leary | Treasurer, Board Member |
| Line Item | Amount |
|---|---|
| Other Expenses | $216,224 |
| Salaries, Compensation, and Employee Benefits | $45,623 |
| Total Fundraising Expense | $6,684 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Fees for Services Management | $75,025 | $0 | $0 | $75,025 |
| Other Salaries and Wages | $42,906 | $0 | $0 | $42,906 |
| Occupancy | $41,667 | $0 | $0 | $41,667 |
| Fees for Services Legal | $0 | $26,500 | $0 | $26,500 |
| Advertising | $0 | $20,721 | $0 | $20,721 |
| Fees for Services Other | $8,320 | $9,146 | $0 | $17,466 |
| Information Technology | $0 | $16,313 | $0 | $16,313 |
| Insurance | $0 | $8,710 | $0 | $8,710 |
| Travel | $0 | $0 | $6,684 | $6,684 |
| Office Expenses | $862 | $1,676 | $0 | $2,538 |
| Payroll Taxes | $1,828 | $0 | $0 | $1,828 |
| Other Employee Benefits | $889 | $0 | $0 | $889 |
| Fees for Services Accounting | $0 | $600 | $0 | $600 |
| Total Functional Expenses | $171,497 | $83,666 | $6,684 | $261,847 |
| Line Item | Amount |
|---|---|
| Fundraising Direct Expenses | $0 |
| Fundraising Gross Income | $0 |
| Gaming Direct Expenses | $0 |
| Gaming Gross Income | $0 |
| Professional Fundraising Fees | $0 |
| Line Item | Beginning | End | Change |
|---|---|---|---|
| Loans from Officers, Directors, Trustees, and Key Employees | $0 | $0 | → $0 |
| Receivables from Disqualified Persons | $0 | $0 | → $0 |
| Receivables from Officers, Directors, Trustees, and Key Employees | $0 | - | - |
“A PDF copy of the completed 990 was circulated among all board members prior to the submission of the Form 990, and an email confirmation was received from each board member confirming that they had reviewed the document and approved of the information that was supplied.”
“The policy was enforced on a self-regulating basis. In other words, board members, trustees, and key employees are expected to disclose any conflict of interest as outlined in our written policy, at which point the school would take steps to eliminate or otherwise resolve the conflict of interest.”
“As an independent school, data is readily available giving average salaries for key positions. Proof School has identified a collection of "comparison schools" with whom it aligns itself in terms of tuition and reputation. It then set salaries for those key positions below the comparison salaries at other schools within our geographic region. This process was used to set salaries for the Head of School, the Dean of Humanities, and the Director of Admissions and Outreach, who form the three-person leadership team at the school. This process was undertaken in 2014.”
“This is our first filing so we haven't made anything available publicly yet.”
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 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 2511 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 0 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 694021 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | Proof School provides a full curriculum education for kids who love math in grades six through twelve. Proof School offers a transformative education to young people with a passion for and active curiosity about mathematics, broadly equipping them to reason, communicate, and positively impact their world. |
| IRS990/AdvertisingGrp/FundraisingAmt | 0 | 0 |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 20721 |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 20721 |
| IRS990/AllOtherContributionsAmt | 0 | 715840 |
| IRS990/AllOtherExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 0 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 0 |
| IRS990/BenefitsToMembersGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/BenefitsToMembersGrp/TotalAmt | 0 | 0 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | The Proof School |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 4156243910 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 555 Post Street |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | San Francisco |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 94005 |
| 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 | 2940 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 565518 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/FundraisingAmt | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 0 |
| IRS990/CompDisqualPersonsGrp/FundraisingAmt | 0 | 0 |
| IRS990/CompDisqualPersonsGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/CompDisqualPersonsGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/CompDisqualPersonsGrp/TotalAmt | 0 | 0 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 1 |
| IRS990/ConferencesMeetingsGrp/FundraisingAmt | 0 | 0 |
| IRS990/ConferencesMeetingsGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/ConferencesMeetingsGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 0 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/ContriRptFundraisingEventAmt | 0 | 0 |
| IRS990/CostOfGoodsSoldAmt | 0 | 0 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 715840 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 69 |
| IRS990/CYOtherExpensesAmt | 0 | 216224 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 454062 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 45623 |
| IRS990/CYTotalExpensesAmt | 0 | 261847 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 6684 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 715909 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 0 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 1048420 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/FundraisingAmt | 0 | 0 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/DepreciationDepletionGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 0 |
| IRS990/Desc | 0 | Proof School provides a full-curriculum education for kids who love math in grades six through twelve. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 0 |
| IRS990/DonatedServicesAndUseFcltsAmt | 0 | 0 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 11 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/EscrowAccountLiabilityGrp/BOYAmt | 0 | 0 |
| IRS990/EscrowAccountLiabilityGrp/EOYAmt | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 171497 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FederatedCampaignsAmt | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/FundraisingAmt | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 600 |
| IRS990/FeesForServicesAccountingGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 600 |
| IRS990/FeesForServicesLegalGrp/FundraisingAmt | 0 | 0 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 26500 |
| IRS990/FeesForServicesLegalGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 26500 |
| IRS990/FeesForServicesLobbyingGrp/FundraisingAmt | 0 | 0 |
| IRS990/FeesForServicesLobbyingGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/FeesForServicesLobbyingGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/FeesForServicesLobbyingGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesManagementGrp/FundraisingAmt | 0 | 0 |
| IRS990/FeesForServicesManagementGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/FeesForServicesManagementGrp/ProgramServicesAmt | 0 | 75025 |
| IRS990/FeesForServicesManagementGrp/TotalAmt | 0 | 75025 |
| IRS990/FeesForServicesOtherGrp/FundraisingAmt | 0 | 0 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 9146 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 8320 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 17466 |
| IRS990/FeesForServicesProfFundraising/FundraisingAmt | 0 | 0 |
| IRS990/FeesForServicesProfFundraising/TotalAmt | 0 | 0 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/FundraisingAmt | 0 | 0 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 0 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignGrantsGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/ForeignGrantsGrp/TotalAmt | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form1098CFiledInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form8899Filedind | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 0.2 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 0.2 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 0.2 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 0.2 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 0.2 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 0.2 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 40 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 40 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 40 |
| 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/InstitutionalTrusteeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/InstitutionalTrusteeInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/KeyEmployeeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/KeyEmployeeInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/KeyEmployeeInd | 2 | 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 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | Paul Zeitz |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | Dennis Leary |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | Alon Amit |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | Divya Magaro |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | James Sotiros |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | Ravi Vakil |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | Samuel K Vandervelde |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | Zachary Sifuentes |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | Kathy 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 | 59781 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 83947 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 43531 |
| 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/TitleTxt | 0 | Board Chair |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | Treasurer, Board Member |
| 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 | Head of School |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | Dean of Humanities |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | Director of Community Outreach |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 2013 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedInd | 0 | 0 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/FundraisingAmt | 0 | 0 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 0 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 0 |
| IRS990/GainOrLossGrp/OtherAmt | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 0 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GamingDirectExpensesAmt | 0 | 0 |
| IRS990/GamingGrossIncomeAmt | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 8 |
| IRS990/GovernmentGrantsAmt | 0 | 0 |
| IRS990/GrantAmt | 0 | 0 |
| IRS990/GrantsPayableGrp/BOYAmt | 0 | 0 |
| IRS990/GrantsPayableGrp/EOYAmt | 0 | 0 |
| IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToDomesticOrgsGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/OtherAmt | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 0 |
| IRS990/GrossReceiptsAmt | 0 | 715909 |
| IRS990/GrossRentsGrp/PersonalAmt | 0 | 0 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 0 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 0 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 0 |
| IRS990/IncmFromInvestBondProceedsGrp/ExclusionAmt | 0 | 0 |
| IRS990/IncmFromInvestBondProceedsGrp/RelatedOrExemptFuncIncomeAmt | 0 | 0 |
| IRS990/IncmFromInvestBondProceedsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/IncmFromInvestBondProceedsGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 6 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InformationTechnologyGrp/FundraisingAmt | 0 | 0 |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 16313 |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 16313 |
| IRS990/InitialReturnInd | 0 | X |
| IRS990/InsuranceGrp/FundraisingAmt | 0 | 0 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 8710 |
| IRS990/InsuranceGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 8710 |
| IRS990/IntangibleAssetsGrp/BOYAmt | 0 | 0 |
| IRS990/InterestGrp/FundraisingAmt | 0 | 0 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/InterestGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/InterestGrp/TotalAmt | 0 | 0 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 0 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentExpenseAmt | 0 | 0 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 0 |
| IRS990/InvestmentIncomeGrp/RelatedOrExemptFuncIncomeAmt | 0 | 69 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 69 |
| IRS990/InvestmentIncomeGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsOtherSecuritiesGrp/BOYAmt | 0 | 0 |
| IRS990/InvestmentsProgramRelatedGrp/BOYAmt | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 7 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 0 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 0 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 2120 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 2120 |
| IRS990/LegalDomicileStateCd | 0 | CA |
| IRS990/LessCostOthBasisSalesExpnssGrp/OtherAmt | 0 | 0 |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 0 |
| IRS990/LessRentalExpensesGrp/PersonalAmt | 0 | 0 |
| IRS990/LessRentalExpensesGrp/RealAmt | 0 | 0 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LoansFromOfficersDirectorsGrp/BOYAmt | 0 | 0 |
| IRS990/LoansFromOfficersDirectorsGrp/EOYAmt | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembershipDuesAmt | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | Proof School provides a full-curriculum education for kids who love math in grades six through twelve. Proof School offers a transformative education to young people with a passion for and active curiosity about mathematics, broadly equipping them to reason, communicate, and positively impact their world. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/BOYAmt | 0 | 0 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 2940 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 457298 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 0 |
| IRS990/NetGainOrLossInvestmentsGrp/RelatedOrExemptFuncIncomeAmt | 0 | 0 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetGainOrLossInvestmentsGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt | 0 | 0 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncmFromFundraisingEvtGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/NetIncomeFromGamingGrp/ExclusionAmt | 0 | 0 |
| IRS990/NetIncomeFromGamingGrp/RelatedOrExemptFuncIncomeAmt | 0 | 0 |
| IRS990/NetIncomeFromGamingGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncomeFromGamingGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/NetIncomeOrLossGrp/ExclusionAmt | 0 | 0 |
| IRS990/NetIncomeOrLossGrp/RelatedOrExemptFuncIncomeAmt | 0 | 0 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncomeOrLossGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/NetRentalIncomeOrLossGrp/ExclusionAmt | 0 | 0 |
| IRS990/NetRentalIncomeOrLossGrp/RelatedOrExemptFuncIncomeAmt | 0 | 0 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetRentalIncomeOrLossGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 296 |
| IRS990/NoncashContributionsAmt | 0 | 0 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/FundraisingAmt | 0 | 0 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 41667 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 41667 |
| IRS990/OfficeExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 1676 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 862 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 2538 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrgDoesNotFollowSFAS117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 0 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt | 0 | 889 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 889 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 0 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 0 |
| IRS990/OtherRevenueTotalAmt | 0 | 0 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 0 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 42906 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 42906 |
| IRS990/OthNotesLoansReceivableNetGrp/BOYAmt | 0 | 0 |
| IRS990/OthNotesLoansReceivableNetGrp/EOYAmt | 0 | 246570 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PaymentsToAffiliatesGrp/FundraisingAmt | 0 | 0 |
| IRS990/PaymentsToAffiliatesGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/PaymentsToAffiliatesGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/PaymentsToAffiliatesGrp/TotalAmt | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 0 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 1828 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 1828 |
| IRS990/PdInCapSrplsLandBldgEqpFundGrp/BOYAmt | 0 | 0 |
| IRS990/PdInCapSrplsLandBldgEqpFundGrp/EOYAmt | 0 | 0 |
| IRS990/PensionPlanContributionsGrp/FundraisingAmt | 0 | 0 |
| IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/PensionPlanContributionsGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 0 |
| IRS990/PledgesAndGrantsReceivableGrp/BOYAmt | 0 | 0 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 0 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 0 |
| IRS990/PrincipalOfficerNm | 0 | Samuel K Vandervelde |
| IRS990/PriorPeriodAdjustmentsAmt | 0 | 0 |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 611110 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | Tuition |
| IRS990/ProgramServiceRevenueGrp/ExclusionAmt | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 0 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 0 |
| IRS990/PymtTravelEntrtnmntPubOfclGrp/FundraisingAmt | 0 | 0 |
| IRS990/PymtTravelEntrtnmntPubOfclGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/PymtTravelEntrtnmntPubOfclGrp/ProgramServicesAmt | 0 | 0 |
| IRS990/PymtTravelEntrtnmntPubOfclGrp/TotalAmt | 0 | 0 |
| IRS990/PYOtherExpensesAmt | 0 | 0 |
| IRS990/PYOtherRevenueAmt | 0 | 0 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 0 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 0 |
| IRS990/PYTotalExpensesAmt | 0 | 0 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
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Displayed year
2015 • Form 990Detailed filing. Detailed filing data is available for this year.