As an American, I believe that all teachers should be given the right to carry a concealed weapon within our school systems. I don't think this law should be mandatory, but I do believe it would be a good preventative measure for teachers willing to participate.
Teachers looking to carry within our school systems should be required to complete a CCW class and obtain a Concealed Pistol License / Concealed Carry Permit if they have not done so already, even if the state doesn't require a CCW class to carry otherwise, along with having the proper training with realistic scenarios geared specifically for use within our school systems.