I would feel safer if I knew the kids who were packin heat had allll their shit together "upstairs". If they were crazy, short fused mofo's, I'd be worried , unless I was a faster/better aim.
I have my Ohio CCWL. Ohio law states our students can't carry guns in school's however. I think under the right conditions, knowing some people are packing heat, it may just make the nut jobs think twice about going into a classroom for target practice or vengence.However, I'm sure those same nutjobs would find a tower/tall building to shoot from, and take people out this way.
We all are doomed, to an extent, if a nutcase wants to harm us. I like having a chance though...Just one!