Proof School

“For kids who love math”

Independent · Financial District · AKA: Proof

Proof School

“For kids who love math”

Students: ~70
Ratio: 5:1
Tuition: $57k

Enrollment: ~70
Student:teacher: 5:1est.
Base tuition: $56,830
Real cost: $58k–$62k

What makes this school special

Built entirely around mathematics: every student spends two hours on math each afternoon, with courses ranging from those accessible to any sixth grader through college-level analysis, topology, and number theory
Need-blind admissions; for highest-need families the Equal Opportunity Fund covers up to 99% of tuition plus daily transit, lunch, a laptop, and SAT/AP/college-application fees
Students map their own multi-year path through a college-level liberal-arts core, with no APs and no class rank (SAT averages for recent graduates run about 1538)
Draws math-loving students from across the Bay Area, many commuting one to three hours round trip

Academics

Curriculum

College-level mathematics and a liberal-arts core; no APs

Do APs matter?

World languages

Latin

Schedule

Quarters (plus experiential-learning terms)

Signature programs

Two hours of mathematics every afternoon
Experiential-learning term after each quarter
Student-led public math festivals
Independent projects with faculty mentorship

College matriculation

Harvard, MIT, Stanford, Princeton, Yale, Brown, Columbia, UPenn, Cornell, University of Chicago, Carnegie Mellon, Harvey Mudd, UC Berkeley, UC Santa Barbara, Georgetown

See the full list

UC admissions

In fall 2025, 12 students applied to the UC system from this school; 10 were admitted to at least one campus, and 3 enrolled.

See UC’s data

What these numbers can and can’t tell you

Athletics, arts & activities

Arts

Studio ArtDesign & MakingCreative Writing

Life there

Learning support

Project Studio and faculty mentorship; small classes (avg 12)

Applying

Key dates

Applications open: Late August
Application due: Beginning of January
Decisions released: Mid-to-late March

The application

Proof School admits students into 6th, 7th, 8th, and 9th grades; applicants should be at least 11 years old by August 31 of the year they enter. The process is designed for the family and the school to get to know each other, admission is need-blind, and there is no application fee. The school's website is mid-rebuild and its admissions pages are offline, so the next cycle's dates aren't published yet — applications have historically been due at the beginning of January, and info@proofschool.org (the address on the current site) has the details.

Testing

Test-free

Getting there

221 Main Street, STE 104

Transit

Embarcadero BART + Muni Metro

Transit directions

Contact the school

info@proofschool.org Visit the admissions site

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Sources

Proof School — current location (221 Main Street, STE 104, San Francisco, CA 94105), phone
Proof School's About and Apply pages — mission, founding (2015), community, entry grades, need-blind admissions, no application fee, tuition, Equal Opportunity Fund. These values were read from the school's site before its 2026 rebuild; the pages are offline while the new site is built (the old URLs now land on the homepage, the new ones are password-protected), so they can't be re-verified or linked. Re-checked 2026-07-27.
Profile for College Admissions 2025-26 — enrollment (130), teachers (26), average class size (12), grades, no APs, schedule, curriculum, Latin, SAT averages, college matriculation (the PDF masthead still lists the pre-move 973 Mission Street and announces the 2025-26 relocation to 221 Main Street)
California Private School Affidavit 2025-26 | CDE — high-school headcount (72 in grades 9–12; 129 across 6–12, 2025-26 filing). CDS 38684786150254.

Details checked July 2026