Semper Fidelis, Semper Liber.
Stolen fair and square from the Capt. Courtesey himself.I spit at lots of people through my computer screen. Not only does it "teach them a lesson" but it keeps the screen clean and shiny.
I agree that security needs to be improved and armed. IMHO having teachers with concealed carry permits in the classroom and around schools is a bad idea. School districts need to forge relationships with local police so both can collaboratively fund school police salaries and equipment.
One problem with school security is that many school buildings are outdated and campuses are too open. Have security at all entrances and stop vehicles without parking decals visible to security. Exits should be effectively designed for traffic to go out only; try to enter and your tires blow out. Similar to military base entrance/exit security. This will help prevent violence from external sources.
To prevent internal sources of violence have school police as well as unarmed security like mall security to patrol hallways and perimeter. Have school violence prevention hot lines set up and train counselors in intervention methods to identify and respond to possible threats with school administration, security, police, et al.
Continually refine and practice lock down and response procedures for acts of violence. This needs to be done bi-monthly, and twice during the first two weeks of school.
As we have recently seen, no school is too small or too remote to implement and continually practice safety procedures that will save lives.