Tilden Prep is a unique, WASC accredited, college preparatory school for grades 6-12 that offers one-to-one and small group classes within an inclusive school community. Courses are U.C. approved for full-time, part-time and summer school with rolling enrollment. Students with a wide range of learning preferences find Tilden Prep the ideal alternative to a regular classroom setting. We use mastery learning, teaching students to 80% (B) or a higher level of mastery before moving forward.