Come see what authentic Montessori is all about. 4 schools in. Irvine, CA. family-owned and operated since 1976. Accredited by. NAEYC. (National Association for the Education of Young Children) and affiliated with the American Montessori Society. (AMS). low ratios = less stress more love. 4:1 for toddlers (including until 3 years old. ), 10:1 for preschool. supportive teaching teams in a model environment. benefits for full time including medical...