California public schools are now legally required to include the contributions of the gay community in its social studies curriculum.
Gov. Jerry Brown signed the bill into law Thursday, making California the first state to ever recognize homosexuals in U.S. history lessons.
"History should be honest," the governor said in a statement. "This bill revises existing laws that prohibit discrimination in education and ensures that the important contributions of Americans from all backgrounds and walks of life are included in our history books."
Religious and conservative groups have criticized the legislation, saying it promotes the homosexual lifestyle and exposes kids to "sexual brainwashing."
"Jerry Brown has trampled the parental rights of the overwhelming majority of California fathers and mothers who don't want their children to be sexually brainwashed at school," said Randy Thomasson, president of the group SaveCalifornia.
CBN News spoke with Randy Thomasson more about the new law and how parents can stand against this move. Click play for his comments.
"This new law will prohibit textbooks and teachers from telling children the facts that homosexuality is neither healthy nor biological," he added.
The new law will require the California Board of Education and local school districts to adopt textbooks and other teaching materials that cover the contributions and roles of "sexual minorities," as soon as the 2013-2014 school year.
Thomasson said many parents will be forced to take their children out of public school to avoid "immoral indoctrination" because of the legislation.