Your stats actually back my position up quite nicely, which is: if you're going to have an armed society, then probably the worst thing you can do is gather large numbers of children together under the care of people who are themselves unarmed.
Personally, I think that it's reasonable to be allowed to go armed in public; especially for the old, infirm, and physically weak a weapon is a great equaliser.
The problem comes when you have an armed society, with pockets of disarmed (as opposed to unarmed) prospective victims.
It's a have-your-cake-and-eat-it situation. Either you disarm the population (wearing the cost to those incapable of physically defending themselves, and also, best of luck with that) or you arm the teachers who wish to be armed.
Any other position is wishful thinking.
Because after the first shooting started by a teacher, there's really noone left to arm. Other teachers, or security are not exactly helpful here, because the shooter has easy access to taking kids hostage. Everyone who was useful has been armed. What's the solution now? And if there is one, why wouldn't we apply it as step one, before arming teachers?
http://qz.com/37015/how-school-killings-in-the-us-stack-up-a...