Valley Montessori School is a nationally recognized model Montessori school for children 18 months old through 8th grade. We are the largest not-for-profit, and only triple accredited school in California. We are fully accredited by the American Montessori Society (AMS), the California Association of Independent Schools (CAIS) and the Western Association of Schools and Colleges (WASC). VMS is a certified California Green Business making us the only school in the Tri-Valley and just one of four Montessori schools in the state of California with this distinguished honor."