I am a retired high school chem teacher. I taught in a suburban school. I taught for 35years. We went from all the doors open to front door entry only. Badges required for all personnel though I was retired by then (2006). We also had an armed police officer on duty during school hours. I think every school should have one at least. It has to be done. I can't picture some of my former colleagues handling a firearm even with training. It's just too much to expect. There's already too much to the job. Yiogo