Even if we all have the right to have a gun, guns to take on other guns are no more a winning defense as having cards to take on the dealer in poker. Could lose out if you don’t play. Could win. Could lose more than you planned on. And like poker, a lot depends on how you play what you got more than what you’re really holding. Sometimes you have a good hand. Sometimes the dealer does. And sometimes the guy with the crappiest hand can win if he plays better than you. The since the house is the one that usually sets up the game, the house wins more the long term.
Specifically with gun at school cases, you’re betting the kids. Think about the odds. Then I’d ask, is English teacher, Miss Jenkins or Mr. Thomas, the person you want playing that hand?

“Okay Miss Jenkins, you have a gun. I’ll I shoot all the kids in this room if you don’t drop it.” In poker, that could be a bluff. In real gun to gun situation that could be a kid. Is a teacher cool enough to handle it?