GW man, they're teachers, not professionals. if you're a teacher, great, and i hope we've got more like you, but i don't think there is a prayer that we'll get the majority of the educational employees up to snuff for shooting actively, and even if we could it would raise a lot of policy issues. my point of view is that it if a school implemented a violence strategy would be short-range and reactive, and the goals of the teachers would be to corral and shield the children, not expressly to eliminate the threat. the premise of a "teacher response team" donning riot gear and storming the gymnasium is preposterous, and the point of employing this would be to buy the officers outside time and provide a defensive option for classrooms. i understand some schools do lockdown drills already, and that is my impression of what would happen, they'd try to isolate the students from the threat, not create a proactive resistence to neutralize it. for that purpose, i think shotguns are the best balance you'll get. they are easier to use with relatively little training for reasons cited - why don't more people shoot trap with pistols if not? their limited capacity encourages discretion, because you're not going to spray and pray if you'll be reloading one shell at a time every five seconds. they're best utilized at close ranges, which reinforces the intention by my assumptions, to stop an aggressor attempting to get into one of the student lockdown points. in terms of actually acquiring and storing them at a school, they're relatively cheap, they're robust and require little maintenance, and their large size (even with the barrel removed) decreases the likelihood of theft, as opposed to pistols or modular compact rifles that can be broken down with ease. i don't deny the shortcomings you've mentioned, and others, like how the teachers are SOL if the shooters are wearing armor. but grounded in reality, this is my opinion of the option that has the fewest drawbacks. you don't have to agree, but just try and understand what i'm getting at. it's been fun and you can have the last word if you're so inclined.