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.
Public Charity
PROOF SCHOOL
PROOF SCHOOL is a Public Charity headquartered in SAN FRANCISCO, CA. Financial data from the 2025 filing: $11.2M revenue, $6.7M expenses, $19.5M total assets. 43 publicly reported grants to this organization, totaling roughly $3.4M, appear in IRS filings.
EIN: 463770194
SAN FRANCISCO, CA
Secondary & High Schools
NTEE: B25
Latest filing: 2025
Total Revenue$11.2M
Total Expenses$6.7M
Total Assets$19.5M
Grant Records43
Funding Total$3.4M
Filing Years2021–2025
Where $100 goes at Proof School
How Proof School divides every $100 it spends, from its own Form 990 filings, averaged across 9 years.
$91
Programs
the work itself
$9
Management
running the organization
$0
Fundraising
none reported
No fundraising costs are reported. That often means fundraising runs through a separate affiliated organization that files its own return.
Inside the $91 for programs
$91
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
Source: Form 990 filings with the IRS, latest fiscal year 2025. Shares are from the organization's reported expenses. Data by Imperigo; not affiliated with the IRS.
Sample Grants Received
FOR RECIPIENT'S EXEMPT PURPOSE
$1,010,692
For grant recipient's exempt purposes
$122,148
EDUCATION
$116,400
GENERAL SUPPORT
$111,719
GENERAL SUPPORT
$111,719
Showing up to 5 of 43 total records — full history available with membership.
Officers & Directors
SECRETARY
Alon Amit
BOARD OF DIRECTORS
Caroline Jones
LITERATURE TEACHER
Connie You
LANGUAGE ARTS & HISTORY TEACHER
Ilyse Gordis
BOARD OF DIRECTORS
James Sotiros
MATH & SCIENCE TEACHER
Jason Horowitz
Officer compensation and complete director data available with membership.
Top Grant Purposes
Financial Trends
| Year | Revenue | Expenses | Assets |
|---|---|---|---|
| 2025 | $11.2M | $6.7M | $19.5M |
| 2024 | $6.7M | $5.9M | $11.6M |
| 2023 | $6.5M | $5.8M | $10.1M |
| 2022 | $6.4M | $5.9M | $9.2M |
| 2021 | $6.2M | $5.3M | $8.5M |
Between 2021 and 2025, reported annual revenue grew from $6.2M to $11.2M (+81%), with total assets most recently reported at $19.5M.
Interactive year-over-year charts and full filing details available with membership.