Directory Schools Gravenstein Elementary School Gravenstein Elementary School Gravenstein Elementary School (K-5, Charter) 3840 Twig Avenue, Sebastopol, CA 95472 (707) 823-5361 | Fax: (707) 823-0478 www.grav.k12.ca.us/GravensteinSchool Kerilee PugnoPrincipal(707) 823-5361 Renee LottSecretary(707) 823-7008 District Gravenstein Union School District