Even the nyPOSt frames it as censoring ideas, not protecting kids.

This is such a weird take to me. Every board of education selects specific reading material that aligns with their lesson plan. I'm against public education in general, but if you're going to have it then the people paying for it (taxpayers, the state) decide what's taught. Teachers don't decide. What the state decides to prioritize or not isn't censorship, especially if the kids can go to a library to learn that thing. Education is basically propaganda for children anyway. But at this level when we're talking about mathematics, it's a rigid philosophy. You're teaching logic and numbers. Common Core and CRT are pedagogical methods. Unless they're hiding the existence of geometry or something, it's not censorship by even the broadest of definitions.