Homeschooling Information
US Department of Education - Homeschooling in US (2012)
https://nces.ed.gov/pubs2016/2016096rev.pdf
Detailed information about the state of homeschooling in the United States.
Schooling at Home in California
https://www.cde.ca.gov/sp/ps/homeschool.asp
Specific information about the ways to homeschool in California.