Challenger School has been inspiring children to achieve since 1963. Challenger School Sunnyvale is a Sunnyvale private school with unmatched academic results. Our students scored in the top 10% nationally on the 2023 Iowa test. Start early and start right. Explore our preschool curriculum. We offer preschool year-round from as early as 7 a.m. to 6 p.m. Our preschool programs are a surprisingly affordable alternative to daycare and can fit with your schedule. Children 2 years and 9 months or older are eligible for our preschool programs. Our Sunnyvale campus offers elementary school for kindergarten through eighth grade. Schedule a tour today to discover the Challenger difference. Conveniently located in Sunnyvale, CA.