Absolutely believe in this but obviously it should not be forced on those that do not wish to and there should be regular training for those that wish too.
Teachers have enough on their plates already?! Are you serious? An option to be proactive and possibly lesson the loss of life or stop it all together and you’d rather they say on their hands and get shot? To what end? Further your stance on gun control (eradication)? This is absurd at best and down right nefarious in my opinion.