Civic Intelligence

Proof School

EIN 46-3770194 • 501(c)3 • San Francisco, CA

Profile

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.

973 Mission StreetSan Francisco, CA 94103

www.proofschool.org

Siviq Scores

Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.

Liabilities / Assets

75th percentile

0.49x

Higher debt load relative to assets than 75% of similar nonprofits.

501(c)3 • $10M-$25M nonprofits • Source year 2023

Liabilities / Revenue

76th percentile

0.75x

Higher debt load relative to revenue than 76% of similar nonprofits.

501(c)3 • $10M-$25M nonprofits • Source year 2023

Net Margin

63rd percentile

11%

Higher net margin than 63% of similar nonprofits.

501(c)3 • $10M-$25M nonprofits • Source year 2023

Top Officer Pay

Score unavailable

No value available

No filing with officer rows is available for this organization yet.

Asset Growth

63rd percentile

9.4%

Faster asset growth than 63% of similar nonprofits.

501(c)3 • $10M-$25M nonprofits • Annualized from 2022 to 2023

Revenue Growth

39th percentile

2.4%

Faster revenue growth than 39% of similar nonprofits.

501(c)3 • $10M-$25M nonprofits • Annualized from 2022 to 2023

Balance Sheet
Liabilities / Assets75th percentile

Assets

Up

$11,550,096

Up $1,481,470 (+15%) from 2023

Liabilities

Up

$5,599,195

Up $713,773 (+15%) from 2023

Net Assets

Up

$5,950,901

Up $767,697 (+15%) from 2023

Operations
Liabilities / Revenue76th percentileNet Margin63rd percentile

Revenue

Up

$6,704,431

Up $174,195 (+2.7%) from 2023

Expenses

Up

$5,936,734

Up $117,115 (+2.0%) from 2023

Net Income

Up

$767,697

Up $57,080 (+8.0%) from 2023

Trend Graphs

Balance Sheet Trend

Asset Growth63rd percentile

Grouped bars show assets, liabilities, and net assets across loaded filings.

$15M$10M$5.0M$0Assets 2015: $1,508,229Liabilities 2015: $1,050,931Net Assets 2015: $457,2982015Assets 2016: $1,354,929Liabilities 2016: $935,991Net Assets 2016: $418,9382016Assets 2017: $4,603,635Liabilities 2017: $2,539,191Net Assets 2017: $2,064,4442017Assets 2018: $5,943,386Liabilities 2018: $3,420,889Net Assets 2018: $2,522,4972018Assets 2019: $6,992,457Liabilities 2019: $4,263,028Net Assets 2019: $2,729,4292019Assets 2020: $7,842,960Liabilities 2020: $4,738,950Net Assets 2020: $3,104,0102020Assets 2021: $8,538,948Liabilities 2021: $4,558,270Net Assets 2021: $3,980,6782021Assets 2022: $9,200,704Liabilities 2022: $4,728,396Net Assets 2022: $4,472,3082022Assets 2023: $10,068,626Liabilities 2023: $4,885,422Net Assets 2023: $5,183,2042023Assets 2024: $11,550,096Liabilities 2024: $5,599,195Net Assets 2024: $5,950,9012024

Highlighted filing

2024

Assets$11,550,096
Liabilities$5,599,195
Net Assets$5,950,901
Open 2024 Filing

Operations Trend

Revenue Growth39th percentile

Revenue, expenses, and net income by year, with the latest filing highlighted.

$8.0M$6.0M$4.0M$2.0M$0-$2.0MRevenue 2015: $715,909Expenses 2015: $261,847Net Income 2015: $454,0622015Revenue 2016: $2,137,511Expenses 2016: $2,175,028Net Income 2016: -$37,5172016Revenue 2017: $4,199,954Expenses 2017: $2,636,069Net Income 2017: $1,563,8852017Revenue 2018: $4,063,295Expenses 2018: $3,602,065Net Income 2018: $461,2302018Revenue 2019: $4,865,600Expenses 2019: $4,529,479Net Income 2019: $336,1212019Revenue 2020: $5,307,911Expenses 2020: $4,932,486Net Income 2020: $375,4252020Revenue 2021: $6,171,169Expenses 2021: $5,294,974Net Income 2021: $876,1952021Revenue 2022: $6,376,046Expenses 2022: $5,884,439Net Income 2022: $491,6072022Revenue 2023: $6,530,236Expenses 2023: $5,819,619Net Income 2023: $710,6172023Revenue 2024: $6,704,431Expenses 2024: $5,936,734Net Income 2024: $767,6972024

Highlighted filing

2024

Revenue$6,704,431
Expenses$5,936,734
Net Income$767,697
Open 2024 Filing

Filings

Most recent year

2024 • Form 990Detailed filing. Detailed filing data is available for this year.

Open filing
Assets
$11,550,096
Liabilities
$5,599,195
Net assets
$5,950,901
Revenue
$6,704,431
Expenses
$5,936,734
Net income
$767,697
Balance SheetOperations
YearAssetsLiabilitiesNet AssetsRevenueExpensesNet Income
2024Detailed filing. Detailed filing data is available for this year.$11.6$5.60$5.95$6.70$5.94$0.77
2023Detailed filing. Detailed filing data is available for this year.$10.1$4.89$5.18$6.53$5.82$0.71
2022Detailed filing. Detailed filing data is available for this year.$9.20$4.73$4.47$6.38$5.88$0.49
2021Detailed filing. Detailed filing data is available for this year.$8.54$4.56$3.98$6.17$5.29$0.88
2020Detailed filing. Detailed filing data is available for this year.$7.84$4.74$3.10$5.31$4.93$0.38
2019Detailed filing. Detailed filing data is available for this year.$6.99$4.26$2.73$4.87$4.53$0.34
2018Detailed filing. Detailed filing data is available for this year.$5.94$3.42$2.52$4.06$3.60$0.46
2017Detailed filing. Detailed filing data is available for this year.$4.60$2.54$2.06$4.20$2.64$1.56
2016Detailed filing. Detailed filing data is available for this year.$1.35$0.94$0.42$2.14$2.18$0.04
2015Detailed filing. Detailed filing data is available for this year.$1.51$1.05$0.46$0.72$0.26$0.45
Latest Filing Detail
Jump To
Filing Snapshot
Filing Period
Jul 1, 2023 to Jun 30, 2024
Signed
May 13, 2025
Return Version
2023v6.0
Gross Receipts
$6,736,556
Mission and Program Overview

Mission

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.

Balance Sheet Detail
LineBeginningEndChange
Assets
Rtn Earn Endowment Incm Other Fnds$5,183,204$5,950,901▲ $767,697
Investments in Publicly Traded Securities$4,294,727$4,560,021▲ $265,294
Accounts Receivable$2,646,531$3,020,070▲ $373,539
Cash and Non-Interest-Bearing Accounts$812,654$1,672,863▲ $860,209
Land, Buildings, and Equipment, Net$1,490,569$1,293,674▼ $196,895
Savings and Temporary Cash Investments$550,002$650,091▲ $100,089
Prepaid Expenses and Deferred Charges$34,143$113,377▲ $79,234
Pd in Cap Srpls Land Bldg Eqp Fund$0$0→ $0
Cap Stk Tr Prin Current Funds$0$0→ $0
Total Assets$10,068,626$11,550,096▲ $1,481,470
Other Assets Total$240,000$240,000→ $0
Liabilities
Deferred Revenue$4,561,890$5,289,120▲ $727,230
Other Liabilities$282,404$243,494▼ $38,910
Accounts Payable and Accrued Expenses$41,128$66,581▲ $25,453
Total Liabilities$4,885,422$5,599,195▲ $713,773
Net Assets / Fund Balance
Total Net Assets Fund Balance$5,183,204$5,950,901▲ $767,697
Total Liabilities and Net Assets / Fund Balance$10,068,626$11,550,096▲ $1,481,470

Asset Categories

AssetBook ValueDepreciationBasis
Leasehold Improvements$1,235,443$1,602,434$2,837,877
Equipment$58,231$56,367$114,598
Compensation and Service Providers
Top Officer PayScore unavailable

Employees

NameTitleFull / Part TimeBaseOtherTotal
Samuel VanderveldeHead of SchoolFT$250,853$22,359$273,212
Zachary SifuentesDean of HumanitiesFT$223,153$16,993$240,146
Kathy LinDirector of AdmissionsFT$234,360$873$235,233
Jason HorowitzMath & Science TeacherFT$114,878$11,105$125,983
Ilyse GordisLanguage Arts & History TeacherFT$100,213$22,522$122,735
Susan DurstMath & Music TeacherFT$111,833$7,316$119,149
Connie YouLiterature TeacherFT$100,470$9,736$110,206

Board Members and Trustees

NameTitle
Paul ZeitzBoard Chair
James SotirosBoard of Directors
Lisa ParkBoard of Directors
Ravi VakilBoard of Directors
Susan AtheyBoard of Directors
Alon AmitSecretary
Perry TamTreasurer
Revenue and Support

Revenue Composition

Contributions and Grants
$692,323
Program Service Revenue
$5,776,922
Investment Income
$233,261
Other Revenue
$1,925
All Other Contributions
$692,323
Change in Net Assets
$767,697

Noncash Contribution Practices

Property subject to holding requirements
No
Reviewed unusual noncash gifts
Yes
Third parties used for noncash contributions
No

Noncash Contributions

Contribution TypeContribution CountReported AmountValuation Method
Securities Publicly Traded7$32,431Fair Market Value (FMV)
Total Noncash Contributions7$32,431-
Expenses and Functional Allocation

Major Expense Lines

Line ItemAmount
Salaries, Compensation, and Employee Benefits$3,262,077
Other Expenses$1,635,568
Grants and Similar Amounts Paid$1,039,089
Total Fundraising Expense$26,274
Professional Fundraising Fees$0

Functional Expense Allocation

Line ItemProgramManagementFundraisingTotal
Other Salaries and Wages$1,686,079$184,163-$1,870,242
Grants to Domestic Individuals$1,039,089--$1,039,089
Occupancy$720,257$207,845-$928,102
Current Officers, Directors, Trustees, and Key Employees$828,176--$828,176
Depreciation Depletion$219,858$62,011-$281,869
Other Employee Benefits$234,219$18,294-$252,513
Payroll Taxes$166,596$14,413-$181,009
Pension Plan Contributions$120,709$9,428-$130,137
Insurance$28,056$7,913-$35,969
Information Technology$19,878$5,113-$24,991
Other Expenses$19,758-$9,116$19,758
Office Expenses$13,393$5,308-$18,701
All Other Expenses--$17,158$17,158
Fees for Services Other$9,676--$9,676
Fees for Services Accounting$6,639$1,872-$8,511
Fees for Services Legal-$1,265-$1,265
Total Functional Expenses$5,392,835$517,625$26,274$5,936,734
Fundraising, Events, and Gaming
Fundraising activities
No
Gaming activities
No
Professional fundraiser used
No

Fundraising and Gaming Totals

Line ItemAmount
Professional Fundraising Fees$0
Political and Lobbying Activity
Political campaign activity
No
Lobbying activity
No
Subject to proxy tax
No
Debt and Bond Financing

Other Reported Liabilities

LiabilityAmount
Deferred Rent$243,494
Governance and Compliance

Governance Checklist

Compiled or reviewed by an accountant
No
Annual disclosure for covered persons
Yes
Backup withholding compliance
Yes
Business relationship with 35% controlled entity
No
Business relationship with family members
No
Business relationship with organization members
No
Material changes to governing documents
No
Compensation from other sources disclosed
No
CEO compensation reviewed
Yes
Other officer compensation reviewed
Yes
Conflict-of-interest policy
Yes
Audited financial statements prepared
No
Key decisions subject to board approval
No
Management duties delegated
No

Governance Explanations

Form 990, Part VI, Section B, Line 11B

“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.”

Form 990, Part VI, Section B, Line 12C

“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.”

Form 990, Part VI, Section B, Line 15

“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.”

Form 990, Part VI, Section C, Line 19

“Documents may be requested by contacting the head of school, who makes decisions regarding their distribution on a case-by-case basis.”

Filing and Contact Details

Filer

Filer Name
Proof School
EIN
46-3770194
Phone
4154265700
Address
973 MISSION STREET, SAN FRANCISCO, CA 94103

Signing Officer

Name
Samuel Vandervelde
Title
Head of School
Phone
4154265700
Signed
2025-05-13
Discuss with paid preparer
Yes

Organization Details

Principal Officer
Samuel Vandervelde
Formed
2013
Legal Domicile
CA
Voting Board Members
8
Independent Board Members
7
Employees
26
Volunteers
7

Preparer

Firm
Hood & Strong Llp
Address
2580 N 1ST ST STE 460, SAN JOSE, CA 95131
Preparer
Jacob Yau
Phone
4089988400
Raw XML AppendixShowing 400 of 556 raw XML fields

This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.

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IRS990/Form990PartVIISectionAGrp/TitleTxt0HEAD OF SCHOOL
IRS990/Form990PartVIISectionAGrp/TitleTxt1BOARD CHAIR
IRS990/Form990PartVIISectionAGrp/TitleTxt2TREASURER
IRS990/Form990PartVIISectionAGrp/TitleTxt3SECRETARY
IRS990/Form990PartVIISectionAGrp/TitleTxt4BOARD OF DIRECTORS
IRS990/Form990PartVIISectionAGrp/TitleTxt5BOARD OF DIRECTORS
IRS990/Form990PartVIISectionAGrp/TitleTxt6BOARD OF DIRECTORS
IRS990/Form990PartVIISectionAGrp/TitleTxt7BOARD OF DIRECTORS
IRS990/Form990PartVIISectionAGrp/TitleTxt8DEAN OF HUMANITIES
IRS990/Form990PartVIISectionAGrp/TitleTxt9DIRECTOR OF ADMISSIONS
IRS990/Form990PartVIISectionAGrp/TitleTxt10MATH & SCIENCE TEACHER
IRS990/Form990PartVIISectionAGrp/TitleTxt11MATH & MUSIC TEACHER
IRS990/Form990PartVIISectionAGrp/TitleTxt12LITERATURE TEACHER
IRS990/Form990PartVIISectionAGrp/TitleTxt13LANGUAGE ARTS & HISTORY TEACHER
IRS990/Form990ProvidedToGvrnBodyInd01
IRS990/FormationYr02013
IRS990/FormerOfcrEmployeesListedInd00
IRS990/FSAuditedInd00
IRS990/FundraisingActivitiesInd00
IRS990/GainOrLossGrp/SecuritiesAmt0306
IRS990/GamingActivitiesInd00
IRS990/GoverningBodyVotingMembersCnt08
IRS990/GrantAmt01039089
IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt01039089
IRS990/GrantsToDomesticIndividualsGrp/TotalAmt01039089
IRS990/GrantsToIndividualsInd01
IRS990/GrantsToOrganizationsInd00
IRS990/GrantToRelatedPersonInd00
IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt032431
IRS990/GrossReceiptsAmt06736556
IRS990/GroupReturnForAffiliatesInd00
IRS990/IncludeFIN48FootnoteInd00
IRS990/IndependentAuditFinclStmtInd00
IRS990/IndependentVotingMemberCnt07
IRS990/IndivRcvdGreaterThan100KCnt07
IRS990/IndoorTanningServicesInd00
IRS990/InfoInScheduleOPartVIInd0X
IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt05113
IRS990/InformationTechnologyGrp/ProgramServicesAmt019878
IRS990/InformationTechnologyGrp/TotalAmt024991
IRS990/InsuranceGrp/ManagementAndGeneralAmt07913
IRS990/InsuranceGrp/ProgramServicesAmt028056
IRS990/InsuranceGrp/TotalAmt035969
IRS990/InvestmentIncomeGrp/ExclusionAmt0232955
IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt0232955
IRS990/InvestmentInJointVentureInd00
IRS990/InvestmentsPubTradedSecGrp/BOYAmt04294727
IRS990/InvestmentsPubTradedSecGrp/EOYAmt04560021
IRS990/IRPDocumentCnt014
IRS990/IRPDocumentW2GCnt00
IRS990/LandBldgEquipAccumDeprecAmt01658801
IRS990/LandBldgEquipBasisNetGrp/BOYAmt01490569
IRS990/LandBldgEquipBasisNetGrp/EOYAmt01293674
IRS990/LandBldgEquipCostOrOtherBssAmt02952475
IRS990/LegalDomicileStateCd0CA
IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt032125
IRS990/LoanOutstandingInd00
IRS990/LobbyingActivitiesInd00
IRS990/LocalChaptersInd00
IRS990/MaterialDiversionOrMisuseInd00
IRS990/MembersOrStockholdersInd00
IRS990/MethodOfAccountingAccrualInd0X
IRS990/MinutesOfCommitteesInd01
IRS990/MinutesOfGoverningBodyInd01
IRS990/MissionDesc0PROOF 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/MoreThan5000KToIndividualsInd00
IRS990/MoreThan5000KToOrgInd00
IRS990/NetAssetsOrFundBalancesBOYAmt05183204
IRS990/NetAssetsOrFundBalancesEOYAmt05950901
IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt0306
IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt0306
IRS990/NetUnrelatedBusTxblIncmAmt00
IRS990/NoncashContributionsAmt032431
IRS990/NondeductibleContributionsInd00
IRS990/OccupancyGrp/ManagementAndGeneralAmt0207845
IRS990/OccupancyGrp/ProgramServicesAmt0720257
IRS990/OccupancyGrp/TotalAmt0928102
IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt05308
IRS990/OfficeExpensesGrp/ProgramServicesAmt013393
IRS990/OfficeExpensesGrp/TotalAmt018701
IRS990/OfficerMailingAddressInd00
IRS990/OperateHospitalInd00
IRS990/Organization501c3Ind0X
IRS990/OrgDoesNotFollowFASB117Ind0X
IRS990/OtherAssetsTotalGrp/BOYAmt0240000
IRS990/OtherAssetsTotalGrp/EOYAmt0240000
IRS990/OtherChangesInNetAssetsAmt00
IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt018294
IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt0234219
IRS990/OtherEmployeeBenefitsGrp/TotalAmt0252513
IRS990/OtherExpensesGrp/Desc0SCHOOL PROGRAMS AND ACT
IRS990/OtherExpensesGrp/Desc1BAD DEBT
IRS990/OtherExpensesGrp/Desc2CURRICULAR EXPENSES
IRS990/OtherExpensesGrp/Desc3RECRUITMENT
IRS990/OtherExpensesGrp/FundraisingAmt09116
IRS990/OtherExpensesGrp/ProgramServicesAmt0190716
IRS990/OtherExpensesGrp/ProgramServicesAmt146386
IRS990/OtherExpensesGrp/ProgramServicesAmt243350
IRS990/OtherExpensesGrp/ProgramServicesAmt319758
IRS990/OtherExpensesGrp/TotalAmt0199832
IRS990/OtherExpensesGrp/TotalAmt146386
IRS990/OtherExpensesGrp/TotalAmt243350
IRS990/OtherExpensesGrp/TotalAmt319758
IRS990/OtherLiabilitiesGrp/BOYAmt0282404
IRS990/OtherLiabilitiesGrp/EOYAmt0243494
IRS990/OtherRevenueMiscGrp/BusinessCd0900009
IRS990/OtherRevenueMiscGrp/Desc0OTHER INCOME
IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt01925
IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt01925
IRS990/OtherRevenueTotalAmt01925
IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt0184163
IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt01686079
IRS990/OtherSalariesAndWagesGrp/TotalAmt01870242
IRS990/PartialLiquidationInd00
IRS990/PayPremiumsPrsnlBnftCntrctInd00
IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt014413
IRS990/PayrollTaxesGrp/ProgramServicesAmt0166596
IRS990/PayrollTaxesGrp/TotalAmt0181009
IRS990/PdInCapSrplsLandBldgEqpFundGrp/BOYAmt00
IRS990/PdInCapSrplsLandBldgEqpFundGrp/EOYAmt00
IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt09428
IRS990/PensionPlanContributionsGrp/ProgramServicesAmt0120709
IRS990/PensionPlanContributionsGrp/TotalAmt0130137
IRS990/PoliticalCampaignActyInd00
IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt034143
IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt0113377
IRS990/PrincipalOfficerNm0SAMUEL VANDERVELDE
IRS990/ProfessionalFundraisingInd00
IRS990/ProgramServiceRevenueGrp/BusinessCd0611600
IRS990/ProgramServiceRevenueGrp/BusinessCd1611710
IRS990/ProgramServiceRevenueGrp/BusinessCd2611710
IRS990/ProgramServiceRevenueGrp/BusinessCd3611710
IRS990/ProgramServiceRevenueGrp/BusinessCd4611710
IRS990/ProgramServiceRevenueGrp/Desc0TUITION
IRS990/ProgramServiceRevenueGrp/Desc1LUNCH INCOME
IRS990/ProgramServiceRevenueGrp/Desc2CAMP FEES
IRS990/ProgramServiceRevenueGrp/Desc3FIELD TRIPS
IRS990/ProgramServiceRevenueGrp/Desc4TESTING FEES
IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt05628840
IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt161410
IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt238280
IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt325343
IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt411440
IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt05628840
IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt161410
IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt238280
IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt325343
IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt411440
IRS990/ProhibitedTaxShelterTransInd00
IRS990/PYBenefitsPaidToMembersAmt00
IRS990/PYContributionsGrantsAmt0803818
IRS990/PYExcessBenefitTransInd00
IRS990/PYGrantsAndSimilarPaidAmt01086140
IRS990/PYInvestmentIncomeAmt082535
IRS990/PYOtherExpensesAmt01554189
IRS990/PYOtherRevenueAmt01804
IRS990/PYProgramServiceRevenueAmt05642079
IRS990/PYRevenuesLessExpensesAmt0710617
IRS990/PYSalariesCompEmpBnftPaidAmt03179290
IRS990/PYTotalExpensesAmt05819619
IRS990/PYTotalProfFndrsngExpnsAmt00
IRS990/PYTotalRevenueAmt06530236
IRS990/QuidProQuoContributionsInd00
IRS990/RcvFndsToPayPrsnlBnftCntrctInd00
IRS990/ReconcilationRevenueExpnssAmt0767697
IRS990/RegularMonitoringEnfrcInd01
IRS990/RelatedEntityInd00
IRS990/RelatedOrganizationCtrlEntInd00
IRS990/ReportInvestmentsOtherSecInd00
IRS990/ReportLandBuildingEquipmentInd01
IRS990/ReportOtherAssetsInd00
IRS990/ReportOtherLiabilitiesInd01
IRS990/ReportProgramRelatedInvstInd00
IRS990/RevenueAmt05778847
IRS990/RtnEarnEndowmentIncmOthFndsGrp/BOYAmt05183204
IRS990/RtnEarnEndowmentIncmOthFndsGrp/EOYAmt05950901
IRS990/SavingsAndTempCashInvstGrp/BOYAmt0550002
IRS990/SavingsAndTempCashInvstGrp/EOYAmt0650091
IRS990ScheduleA/SchoolInd0X
IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine10RESTRICTED
IRS990ScheduleB/ContributorInformationGrp/ContributorNum0RESTRICTED
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine10RESTRICTED
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine20RESTRICTED
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/City0RESTRICTED
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/State0RESTRICTED
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCode0RESTRICTED
IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt0RESTRICTED
IRS990/ScheduleBRequiredInd01
IRS990ScheduleD/EquipmentGrp/BookValueAmt058231
IRS990ScheduleD/EquipmentGrp/DepreciationAmt056367
IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt0114598
IRS990ScheduleD/LeaseholdImprovementsGrp/BookValueAmt01235443
IRS990ScheduleD/LeaseholdImprovementsGrp/DepreciationAmt01602434
IRS990ScheduleD/LeaseholdImprovementsGrp/OtherCostOrOtherBasisAmt02837877
IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt0243494
IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc0DEFERRED RENT
IRS990ScheduleD/TotalBookValueLandBuildingsAmt01293674
IRS990ScheduleD/TotalLiabilityAmt0243494
IRS990ScheduleE/ComplianceWithRevProc7550Ind01
IRS990ScheduleE/DiscriminateRaceAdmissPlcyInd00
IRS990ScheduleE/DiscriminateRaceAthltProgInd00
IRS990ScheduleE/DiscriminateRaceEducPlcyInd00
IRS990ScheduleE/DiscriminateRaceEmplmFcultyInd00
IRS990ScheduleE/DiscriminateRaceOtherActyInd00
IRS990ScheduleE/DiscriminateRaceSchsInd00
IRS990ScheduleE/DiscriminateRaceStdntsRghtsInd00
IRS990ScheduleE/DiscriminateRaceUseOfFcltsInd00
IRS990ScheduleE/GovernmentFinancialAidRcvdInd00
IRS990ScheduleE/GovernmentFinancialAidRvkdInd00
IRS990ScheduleE/MaintainCpyOfAllSolInd01
IRS990ScheduleE/MaintainCpyOfBrochuresEtcInd01
IRS990ScheduleE/MaintainRacialCompRecsInd01
IRS990ScheduleE/MaintainScholarshipsRecsInd01
IRS990ScheduleE/NondiscriminatoryPolicyStmtInd01
IRS990ScheduleE/PlcyPblczdViaBroadcastMediaInd01
IRS990ScheduleE/PolicyStmtInBrochuresEtcInd01
IRS990ScheduleE/SupplementalInformationDetail/ExplanationTxt0PROOF 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/FormAndLineReferenceDesc0SCHEDULE E, PART I, LINE 3
IRS990ScheduleI/GrantRecordsMaintainedInd01
IRS990ScheduleI/GrantsOtherAsstToIndivInUSGrp/CashGrantAmt01039089
IRS990ScheduleI/GrantsOtherAsstToIndivInUSGrp/GrantTypeTxt0FINANCIAL ASSISTANCE
IRS990ScheduleI/GrantsOtherAsstToIndivInUSGrp/RecipientCnt028
IRS990ScheduleI/SupplementalInformationDetail/ExplanationTxt0ALL 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/FormAndLineReferenceDesc0PART I, LINE 2:
IRS990ScheduleJ/AnyNonFixedPaymentsInd00
IRS990ScheduleJ/BoardOrCommitteeApprovalInd0X
IRS990ScheduleJ/CompBasedOnRevenueOfFlngOrgInd00
IRS990ScheduleJ/CompBsdNetEarnsFlngOrgInd00
IRS990ScheduleJ/CompBsdNetEarnsRltdOrgsInd00

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