When I was in school in California we all had to take California history. I remember that a new textbook was written but rejected by the State Board because it included many subjects or statements that the Board did not consider acceptable for exposure to young people. Interestingly, this was a college level history and a few years later I was lucky enough to take California history at the UC from the author and naturally we used his text-book.
Why was this book banned? I wish I still had my copy but I do remember some of the topics. The book and the class were organized around key topics from the history of California: the Gold Rush, the California wine industry, the history of Los Angeles in terms of stolen water, the Japanese internment, the phasing out of existing light-rail and trolley lines to appease the big oil companies that wanted to sell lots of gas, things like that. The less admirable parts of California history weren’t the problem, but why did the Board of Education want to hide the truth from the students? Was it the chapter on Amy Semple McPherson?