One thing you're missing is that a high percentage of teachers are left-leaning; how could they not be, as that is the universal indoc of most colleges?
I had a friend over last weekend who teaches middle school, and he is the lone conservative on the entire middle school staff.
They have a SRO and he has talked about going armed with him, and the SRO said there are a few folks he could work with but the school board would never go for it.
So, the entrance/exit strategies are currently the only strategies available, unless parents take over school boards on safety issues as they have CRT and gender.
Pretty hard though when POTUS goes on TV saying the refusal to mutilate a 12 yo is sinful. Cause, yeah, we leave lots of important decisions to 12 yo kids.
The only true answer, though, is a spiritual revival. We took God out of school and culture, and invented new theologies based on climate and gender. Looks like the last one was a fight between genderism and Christianity.