Higher ups that make way more than the actual teachers some having never taught a day in their life's make decisions on what should be taught and how.

I left my education major behind cause I saw the state of how school districts in most states were being handled.

Well, no. A core curriculum is approved for each grade. Now I don't know if it's so specific that it's broken down to every book. I would definitely like to get some more details on this particular situation. This book banning thing is getting out of hand.