Just take your kids out of the public cesspools...away from the teachers union.
It might be possible to start a school cooperative, parents hiring and firing the teachers, picking the curriculum and text books, either finding, or building a new school house, or rotating from home to home. You can count on the bureaucracy to fight it tooth and nail, though, denying accreditation, imposing restrictions, etc. At the same time, do a property tax strike.
This is sounding like a parallel universe thing, conservatives adopting the tactics of the left to the fight the left. I like it. What’s needed is folk songs.