Diablo Valley School is a private school in Concord, California. It is co-ed and nonsectarian, serving 24 students. It focuses on individual development based on students' natural interests and inclinations and learning patterns. Students are free to do anything they want as long as it doesn't infringe on other students in a harmful or negative way. Ages 5-19 can attend and a minimum of four hours per day is required to maintain minimum attendance. Tuition is among the lowest in private schools in the area and discounts are offered for siblings. Monthly payment plans are offered as well as sliding scale rates.