With all due respect (certainly not tic) Dave, I see a problem with the idea of an armed guard, so to speak, vs. a few armed teachers.

First.....numbers. One guard down with one bullet, then no defense. Maybe a combination of both?

I think collateral damage is a possibility.....and unavoidable. Weigh that against an unchallenged gunman.....no comparison. There is not going to be a perfect choice and I think the best solution is to put as much weight on the side of child protection as possible.

I do agree with your last statement.