2026-05-15T12:24:59-05:00 2025-06-30 941254756 HOOD & STRONG LLP 2580 N 1ST ST STE 460 SAN JOSE CA 95131 990 2024-07-01 463770194 PROOF SCHOOL PROO 4159300182 221 MAIN STREET 104 SAN FRANCISCO CA 94105 SAMUEL VANDERVELDE HEAD OF SCHOOL 4159300182 2026-05-14 1 0 JACOB YAU P01560332 4089988400 2024 2025-03-06 01:10:19Z X SAMUEL VANDERVELDE 221 MAIN STREET 104 SAN FRANCISCO CA 94105 12823279 0 X WWW.PROOFSCHOOL.ORG X 2013 CA OFFERING A LIBERAL ARTS EDUCATION FOR KIDS WHO LOVE MATH, REASONING AND COMMUNICATION. 9 7 31 8 0 0 692323 4207457 5776922 6597629 233261 353335 1925 5792 6704431 11164213 1039089 1200072 0 0 3262077 3728945 0 0 17899 1635568 1721184 5936734 6650201 767697 4514012 11550096 19536521 5599195 9071608 5950901 10464913 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. 0 0 6112438 1200072 6603421 PROOF SCHOOL DELIVERED A COMPREHENSIVE MIDDLE AND HIGH SCHOOL CURRICULUM TO A TOTAL OF 125 STUDENTS IN GRADES 6-12 DURING THE 2024-25 ACADEMIC YEAR. SCHOOL WAS IN SESSION FOR 171 DAYS; THE SCHOOL HELD INFO SESSIONS, RAN ADMISSIONS, AND GRADUATED 15 STUDENTS. THE GOAL FOR THE SCHOOL CONTINUES TO BE TO PROVIDE A WORLD CLASS EDUCATION FOR STUDENTS IN THE BAY AREA WHO LOVE MATH. 6112438 1 1 0 0 0 0 0 0 0 0 1 0 0 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 1 1 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 1 10 0 1 31 1 0 0 0 0 0 0 0 0 0 0 0 0 X 9 7 0 0 0 0 0 0 0 1 1 0 0 1 1 1 1 1 1 1 1 0 CA X SAMUEL K VANDERVELDE 4159300182 221 MAIN STREET 104 SAN FRANCISCO CA 94105 SAMUEL VANDERVELDE HEAD OF SCHOOL 40.00 X X 267945 0 25347 PAUL ZEITZ BOARD CHAIR 2.00 X X 0 0 0 PERRY TAM TREASURER 0.50 X X 0 0 0 ALON AMIT SECRETARY 0.50 X X 0 0 0 JAMES SOTIROS BOARD OF DIRECTORS 0.50 X 0 0 0 RAVI VAKIL BOARD OF DIRECTORS 0.50 X 0 0 0 LISA PARK BOARD OF DIRECTORS 0.50 X 0 0 0 SUSAN ATHEY BOARD OF DIRECTORS 0.50 X 0 0 0 CAROLINE JONES BOARD OF DIRECTORS 0.50 X 0 0 0 ZACHARY SIFUENTES DEAN OF HUMANITIES 40.00 X 242597 0 19278 KATHY LIN DIRECTOR OF ADMISSIONS 40.00 X 253120 0 873 SUSAN DURST MATH & MUSIC TEACHER 40.00 X 122671 0 8083 ILYSE GORDIS LANGUAGE ARTS & HISTORY TEACHER 40.00 X 110781 0 25843 JASON HOROWITZ MATH & SCIENCE TEACHER 40.00 X 124168 0 12757 MICHAEL YETMAN DIR OF SCIENCE CURRICULAR & PROGRAMS 40.00 X 111605 0 17467 CONNIE YOU LITERATURE TEACHER 40.00 X 114657 0 11154 1347544 0 120802 9 0 1 0 0 4207457 1677725 4207457 TUITION 611600 6440484 6440484 LUNCH INCOME 611710 86712 86712 FIELD TRIPS 611710 31208 31208 CAMP FEES 611710 20267 20267 TESTING FEES 611710 11182 11182 7776 7776 6597629 334676 334676 1677725 1659066 18659 18659 18659 OTHER INCOME 900099 5792 5792 5792 11164213 6603421 0 353335 1200072 1200072 907665 907665 2206230 2014744 191486 134562 128091 6471 270084 257096 12988 210404 195495 14909 2980 2980 9304 7257 2047 12167 12167 26982 25473 1509 28323 23715 4608 949904 736339 213565 281869 219858 62011 33136 25846 7290 SCHOOL PROGRAMS AND ACT 242017 242017 CURRICULAR EXPENSES 59530 59530 RECRUITMENT 56864 56864 ADMISSIONS & OUTREACH 17899 17899 209 209 6650201 6112438 519864 17899 1672863 1841459 650091 2000 3020070 3582945 113377 320825 5245675 1940670 1293674 3305005 4560021 8728370 240000 1755917 11550096 19536521 66581 1456925 5289120 5935390 0 1500000 243494 179293 5599195 9071608 X 0 0 0 0 5950901 10464913 5950901 10464913 11550096 19536521 4514012 0 X 0 0 0 X RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED RESTRICTED 2837877 1877781 960096 114598 62889 51709 2293200 2293200 3305005 SECURITY DEPOSITS 1755917 1755917 DEFERRED RENT 179293 179293 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 SCHEDULE E, PART I, LINE 3 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. 1 FINANCIAL ASSISTANCE 28 1200072 PART I, LINE 2: 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. X X 0 0 0 0 0 0 0 0 0 SAMUEL VANDERVELDE HEAD OF SCHOOL 267945 0 0 0 0 0 0 0 25347 0 293292 0 0 0 ZACHARY SIFUENTES DEAN OF HUMANITIES 242597 0 0 0 0 0 0 0 19278 0 261875 0 0 0 KATHY LIN DIRECTOR OF ADMISSIONS 253120 0 0 0 0 0 0 0 873 0 253993 0 0 0 PERRY TAM BOARD MEMBER CONSTRUCTION OF SCHOOL BUILDING X 1500000 1500000 0 1 1 1500000 X 22 1677725 FMV 0 0 1 0 PART I, COLUMN (B): THIS COLUMN REPRESENTS THE NUMBER OF CONTRIBUTORS. 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.