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About Us

Facts In Brief

The Adda Clevenger School is an independent elementary school providing an accelerated academic and arts curriculum to San Francisco Bay Area students grades TK-8 since 1980. Adda Clevenger has neither religious nor political affiliations and no special agendas are served. 

Our facility is a historic, twenty thousand square foot school building located in San Francisco’s Mission/Noe Valley.

Enrollment and Student Body
150 Students, Co-Ed, Grades TK-8
Class Size
Average Class Size: 15
Student to Teacher Ratio


ACS Class of 2023 High School Selection
Urban High School (2)
St. Ignatius College Preparatory (6)
University High School (3)
Sacred Heart Cathedral Preparatory (2)
International High School
Lowell High School
Barack Obama Academy of International Studies, Pittsburg, PA
The Edron Academy, Mexico City

ACS Class of 2022 High School Selection
Sacred Heart Cathedral Preparatory (3)
Waldorf High School (2)
Ruth Asawa San Francisco School of the Arts (SOTA)
The College Preparatory School
Archbishop Riordan High School
Urban High School

ACS Class of 2021 High School Selection
Bay School of San Francisco (1)
Jewish Community High School of the Bay (1)
Junipero Serra High School (1)
Sacred Heart Cathedral Preparatory (4)
San Francisco International High School (2)
San Francisco University High School (2)

ACS Class of 2020 High School Selection
Archbishop Riordan High School (1)
Convent of the Sacred Heart High School (2)
Mercy High School Burlingame (1)
Ruth Asawa School of the Arts (2)
St. Ignatius College Preparatory (3)
Sala Burton High School (1)
San Francisco International High School (1)
Santa Cruz High School (1)
Urban School of San Francisco (1)

Other Recent High School Acceptances Include

Choate Rosemary Hall
Crystal Springs Upland School
Marin Academy
Oakland School of the Arts
Stuart Hall High School
The Branson School
The Hotchkiss School

ACS Class of 2019 High School and 2023 College Selection:

International High School – Stanford
St. Ignatius College Prep – Boston College
International High School – Colgate University
International High School – UC San Diego
San Domenico School – Oberlin Conservatory and Oberlin College of Arts and Sciences
Archbishop Riordan High School - D'Amore-Mckim School of Business at Northeastern University
St. Ignatius College Prep – UCLA
Sacred Heart Cathedral Prep – UC Davis
St. Ignatius College Prep – University of Washington
Sacred Heart Cathedral Prep – NYU
Sacred Heart Cathedral Prep – University of Colorado Boulder
Lick Wilmerding High School –Strathclyde (Scotland)
Lick Wilmerding High School – UC Davis
The Bay School – Drexel University


• The school is open on school days from 7:30 a.m. to 6:00 p.m.
• School day (regular instruction) for all students is from 8:00 a.m. to 5:00pm
• Extended care is available from 5:15-6:00pm

2023 – 2024 Academic Year: August 21, 2023 – June 20, 2024
2024 – 2025 Academic Year: August 26, 2024 – June 20, 2025
2024 – 2025 Tuition:
TK1 $21,075
TK2-8th Grade $36,482 per student. (5% sibling discount)
School Lunch Program