Real simple solution, next time there is a school board election, every seat is overturned and let their replacements know exactly why and that it can happen again. Of course that takes parents that actually want to be involved.
This whole situation is rather confusing. In reading about it yesterday, it appears the school board had nothing to do with it and actually stepped in an over—rode the principal who did this. In another article, it indicated the tutoring group had been started by a number of parents. So at this point - who knows exactly what is going on.