I once suggested that all faculty and staff who legally could, should be encouraged to carry firearms. and that they be concealed, and unadvertised. that way anybody wanting to shoot up the joint wouldn't know who would shoot back
Nice theory, but I doubt these wackos are concerned about someone shooting back because they know going in that they will die before its over.
I wouldn't want the teachers armed here, but I do think it is time to have every entrance with video cameras along with the parking lot, etc., so if someone strange approaches the school, the school gets locked down automatically including classrooms and the police immediately notified.
I think surveillance cameras are a must today at the schools with someone monitoring them while school is in session.