Welcome to Keystone Montessori School
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Keystone Montessori School is located in a beautifully renovated mill in North Chelmsford, Massachusetts. KMS regularly hosts parent education courses, talks by renowned Montessori speakers and authors, as well as celebrations in honor of our diversity.

KMS works with other Montessori schools advocating for Montessori education. This is done through our connections with the Montessori Schools of Massachusetts. Our faculty and staff participate at the annual American Montessori Society conference, as well as at local seminars and workshops.