This is an authoritarian way of thinking. We will arm them. Concealed carry is the responsible position. We will defend ourselves and our students. The motivation is key. If you allow teachers the freedom to conceal carry, the teachers will not only be compliant, but train themselves and be on the scene of an incident. I can just imagine a fat security guard with a weapon and the costs involved with training. An adult carrying is the best because also they are not in uniform, marking themselves, and they are already in the classroom with the students and they probably know the other teachers better and can prepare themselves and not fire carelessly out of duty but out of personal responsibility. I trust the individual who feels called to do this because that person will have gone through the mental preparation and practiced for that purpose of defense, whereas the police officers and security guards not so much.