Some teachers have a difficult time grasping reality with adults. I'd approve armed police in schools, that creates jobs anyway.
Has anyone considered the logistics of training the thousands of teachers, who will pay for it, and securing their weapons?
How about some heavy doors and door locks? You can't get to the kids in a locked classroom, you can't make them a victim.
Pssssst. Federal, state and local governments are broke. We are taxed enough already. Arm those that are already there every day.