Alright, I have a couple of ideas on this subject. Assign a certain number of teachers to be designated to carry on the premises of the school. The number should be at least 2, but would vary according to school size. These teachers would be required to attend training (to be developed) each year and also engage is some form of continuing education. Each teacher that volunteers for this will be given a stipend equal to 10-15% of their salary. No armed guards needed. Just a thought.