I suspect most people would say that the school board and superintendent are the primary people who set policy and what is taught in our schools. If you agree with that, think again.
There are two unions that control the schools. No one gets hired or fired without their permission. Nothing gets taught unless it meets their criteria.
…and of course, who controls the unions. I’ll give you two guesses and the first one doesn’t count. I will give you a hint. They very likely contribute to one and only one political party… not the republicans.