@Tom But does it create another one? Teachers aren't subject to the same level of scrutiny required to become an armed officer of the law. I don't think that armed teachers are necessarily bad, but I would want to see strict oversight on which teachers could be armed.
@BigFish just raise the scrutiny in the teachers that will more than likely volunteer to do it. I would! "Kids, ignore protocol, and don't throw your pencils at this active shooter trying to murder us, I've got this."