We teach ALICE; Run, Hide, Fight; and other preventative classes. As far as campus safety systems go, most of our districts have either used Catapult or Raptor in the past. Both seem to be getting quickly outdated and not covering everything. More recently, many have been integrating Aegix. It has a real time, interface that connects all the emergency personnel and logistics to teachers and staff as incidents unfold. That is just a rough summery of course, but hopefully it conveys the basic idea.