I am utterly dumbfounded as to what I would do if that mandate were made here. It is very likely that someday very soon it will be.
If they are willing to turn classrooms into a battleground, so should the parents and students. How about organized, direct resistance? If the parents get together and school their kids to do some kind of group resistance activity in class, thus making it impossible for the class to continue, what can they do short of calling the police. It'll be awfully hard for those "teachers" to work their magic when they're ducking a torrent of books, pencils and chairs. Imagine such group resistance over the entire province on one day or every day as long as the gov persists with their agenda.