Alsion Middle/High School Photo - Alsion School is a non-profit Montessori based program that serves grades 7-12 in the Mission area of Fremont, CA.

Best California Private High Schools Belonging to American Montessori Society (AMS) (2025-26)

For the 2025-26 school year, there are 3 private high schools belonging to American Montessori Society (AMS) serving 1,529 students in California. You can also find more schools membership associations in California.
The top ranked private high schools belonging to American Montessori Society (AMS) in California include Bowman School, Sacred Heart Schools, Atherton, and Alsion Middle/High School.
The average acceptance rate is 59%, which is lower than the California private high school average acceptance rate of 78%.
33% of private high schools belonging to American Montessori Society (AMS) in California are religiously affiliated (most commonly Catholic).

Top Ranked Private High Schools Belonging to American Montessori Society (AMS) in California (2025-26)

School
Location
Quick Facts
Alsion Middle/High School
Alsion Middle/High School Photo - Alsion School is a non-profit Montessori based program that serves grades 7-12 in the Mission area of Fremont, CA.
Montessori School
(2)
750 Witherly Ln
Fremont, CA 94539
(510) 445-1127
Gr: 7-12 | 48 students Avg. class size: 12 students Extracurrculars: 12 Tuition & acceptance rate listed
Bowman School
Bowman School Photo
Montessori School
(1)
4000 Terman Drive
Palo Alto, CA 94306
(650) 813-9131
Gr: NS-12 | 265 students Avg. class size: 24 students Sports: 8 | Extracurrculars: 3 Tuition listed
Sacred Heart Schools, Atherton
Sacred Heart Schools, Atherton Photo - Sacred Heart Schools, Atherton sits one 64-acre campus housing the Preschool & Kindergarten, Lower & Middle Schools and Preparatory.
(Catholic)
150 Valparaiso Avenue
Atherton, CA 94027
(650) 322-1866
Gr: NS-12 | 1,216 student Avg. class size: 15 students Sports: 14 | Extracurrculars: 5 Tuition & acceptance rate listed

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