St. Mark's Nursery School is a preschool located in in Orinda CA - primarily serving Orinda, Lafayette and Moraga families. In over four decades, our enrollment has grown, and many families have happily called St. Mark's as "our preschool". Some things have changed since that first day almost 50 years ago, of course. But the best things about our school remain the same. A balanced program, which offers children a mix of free play and structure in a safe and secure environment.