Best Montessori schools in San Mateo, California

How we rank. This is a transparent, unpaid ranking — no school pays to appear. Schools are scored by, in order of weight: (1) accreditation (accredited by AMS, AMI, or IMC counts most, then membership), (2) Google rating, and (3) number of reviews (log-damped, so a handful of 5-star reviews can’t outrank a long track record). Always verify on a tour.