School Wise Press This site "seeks to put the power of information about California schools in the hands of parents." Includes books, articles, shopping area.
EdSource This independent, nonpartisan California nonprofit organization specializes in clarifying complex education topics and policy choices through balanced analyses of education issues and accurate education data.
Ed-Data This site provides fiscal, demographic and performance data on California's K-12 schools.
California Department of Education provides information about California schools, including API scores.