- Academic Therapy Publications
 - Novato - Publisher of K-12 regular and special ed. resource and curriculum materials for parents and teachers. - Marilyn Burns Education Associates
- Sausalito - Offers nationwide inservice courses and workshops and publishes math teaching and learning materials.
- Thornburg Center for Professional Development
- San Carlos - Provides staff development and consultation in the areas of educational technology and the future of educational practice, pedagogy, and curriculum for the coming century.
- Nienhuis Montessori
- Mountain View - Manufacturer-provider of Montessori classroom materials, serving public and private schools worldwide.
- Computer Assisted Testing Service, Inc.
- Burlingame - Computer based testing provider for the FAA, FCC, and NIPA.
- Transworld Schools
- San Francisco - Offers TEFL certificate teacher training and English language study programmes.
- California Academic Press
- Millbrae - Develops models for assessing critical thinking skills. Also provides consulting services.
- Columbia Review
- San Francisco - Live courses and home study courses for the MCAT.
- Learning Game, The
- Cupertino - Educational toys, teaching aids, children's books, work books, and creative toys.
- Mastery Learning Systems
- Ukiah - Sells supplemental basic math materials and provides inservice training for teachers.
- KnowledgeQuest
- Los Gatos - Learning centre for children in grades K-12 offering individualized tutoring and enrichment programmes.
- Honeycomb
- San Jose - Bay Area homeschool newsletter, covering legal matters, events, and resources.
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