An innovative, independent, coeducational school for students in preschool-grade 12. Innovative, in-demand, independent education for preschool-grade 12. Start here. Go anywhere. The Barstow School is a coeducational independent school where students in Preschool through 12th grade develop in a challenging educational community. As originally stated by Mary Louise Barstow, the mission of the school remains "to promote sound scholarship and to give symmetrical development to mind, body and character."