After years of cancelling and censoring speech, the left is now claiming that censorship is mainly coming from the right, but exercising control over school curricula has never been considered "censorship." It is nothing new for state legislatures to lay down basic requirement for public education.
Establishing school curricula always involves choices of what to include and what to exclude. In recent years, the left has been eliminating many traditional materials from school curricula, but this was never considered "censorship." It's only "censorship" when conservatives push back.
Re: Establishing school curricula always involves choices of what to include and what to exclude.
^^^^^^^^^^^^^^^^^
Those choices are never politically, culturally, or religiously neutral. Philosophic neutrality is impossible in the mind of any sentient human. It is impossible in schools, too.
Solution: Complete separation of school and state. Obviously, that is politically impossible at this time. Vouchers, charters, and tax credits are becoming more popular and would ease the transition.