From School Reform News:
School authorities in California sent a letter to homeschool parents telling them homeschooling is illegal, which is not true.
The Homeschool Legal Defense Association (HSLDA) reports all of its members in the San Benito High School District (SBHSD) received a letter in July from SBHSD officials that read in part, “[U]nder California Law, a home school is not a private school, nor is it a lawful alternative to public school.”
California law requires parents withdrawing their child from public school in favor of homeschooling receive a private school exemption. Parents can establish their homeschools as private schools by filing an affidavit with the Superintendent of Public Instruction of California.
Photo by mom2rays 
