well actually it's the other way around. In the real world, not NRA fantasy land, more people would die due to arming schools than from rare attacks by nut jobs. Besides no one is saying that in specific cases you can't have appropriate security in schools but this idea of making an armed camp out of them is nuts. School isn't the army. Keep your guns at home along with you smart phones and weed.
So you are saying that vetted teachers are just as likely to turn homicidal as angst ridden bullied teanagers with mental illness?