Its high time teachers take up compulsory Iaido (immediate Shinken level), Kyoukushin Karate (until they learn to break blocks of ice without breaking their hands), Aikido, Judo and shooting at NIE.
And during school orientation, teachers shld have a demonstration to the entire school where they literally smash bricks, take on 20 attackers simultaneously, flip ppl 10 times their size into a submission hold and slice off a bunch of bamboo with 1 single smooth and swift stroke of a Japanese katana and shooting pinned flies on a rotating target with a human (preferably the school gangster) attached on it, blindfolded.
Send a message to potential school gangsters (or those who are thinking of playing punk with teachers), "Mess with me, end up like them."
Hell, school would become a lot more interesting!