Armstrong at a Glance


Armstrong has been serving dyslexic learners in a co-educational environment since 1968. The school was founded by Dr. Wilbur Mattison and The Charles Armstrong Foundation.


Armstrong is located in Belmont, CA on 4.5 acres in a residential neighborhood. 29,000 sq ft of classroom and specialty program spaces are complemented by outdoor play, gathering, and creative areas throughout the campus. The school borders McDougal Park and, in partnership with Belmont, has sole use of its playing fields during the school day. 


List of 9 items.

  • Up to 130 students enrolled in Lower School (grades 2-5)

  • Up to 120 students enrolled in Middle School (grades 6-8)

  • Rolling admissions: early intervention encouraged

  • Average class size:

    14 students in Lower School
    20 students in Middle School
    4-8 students in small group instruction cohorts for literacy and math 
  • $2 million in tuition assistance awarded to 30% of families

  • 33% of students identify as people of color

  • 51 new families welcomed

  • 38: the number of cities/towns where our families live

    • Northernmost: Fairfax (Marin County)
    • Southernmost: Mount Hermon (Santa Cruz County)
    • Easternmost: Pleasanton (Alameda County)
    • Westernmost: Half Moon Bay (San Mateo County)
  • 20: the number of independent and public high schools the 36 graduates of the Class of 2023 attend


List of 9 items.

  • 77 faculty and staff members

  • 4.3:1 student-to-educator ratio

  • 10 Specialty area teachers

  • 9 Instructional coaches and learning specialists

  • 2 Counselors

  • 2 Next school placement coordinators

  • 40% of teachers have advanced degrees

  • 16: Average years of overall teaching experience

  • 8: Average years of Armstrong teaching experience

Notice of Nondiscriminatory Policy as it relates to Students

The Charles Armstrong School admits students of any race, color, sexual orientation, and national and ethnic origin to all the rights, privileges, programs, and activities generally accorded to or made available to students at the School. The School does not discriminate on the basis of race, color, sexual orientation, national and ethnic origin in the administration of its educational policies, admissions policies, financial aid program, and athletic and other administered programs.