>>Arm the teachers and bus drivers, as we do in Israel.
Our teachers and bus drivers are not the sort of people you give a gun to. We need to change the rules for being a teacher first (i.e. a certain percentage need to have teaching as a second career because idealistic 24 year olds don’t know squat about life).
One quick way to teach them about life is a marksmanship and gun safety course, and then a piece of hardware strapped to their waists. If a maniac charges through the door with a gun and starts picking off their students, they’ll do the right thing. Best part of it is, they probably won’t have to, because visibly wearing a sidearm while on duty deters would-be maniacs.