I don't think many teachers would want the responsibility, they are way overloaded already with all the social engineering that is supposed to be accomplished in the home. Maybe some parental accountability is more in order than armed teachers in our schools.
Parental accountability didn't stop the school shooting in Pearl, MS. An armed Assistant Principle did.
My wife and I both taught in the People’s Republic of New Jersey for 33 and 35 years respectively . We both have firearm ID’s ,belong to the NRA and believe that competent, qualified teachers should be allowed to CCW in a school . If that was the case a nutcase would think twice about taking over a school because they would not all be “sheeple “