Description of safety strategy:
Intercom entrance only to schools during school hours. Proper ID required.
Buzzer from main office or even janitor office which would automatically lock class room doors upon illegal entrance to school or any outbreak of violence.
Teachers should have cans of mace in a locked cabinet to dispense to students for self-protection during attack. Educate children to attack as a pack instead of standing around and allowing themselves to be shot by a lone gunman. It is better to overpower than allow one person to randomly choose victims. I would rather know my child tried to defend his life than allow it to be taken without a fight.