Double Naught Spy
Sus Venator
I would think that any training with rocks could be supplanted with training to congregate in particular rooms ... with armed and trained teachers or staff present.
This is an exceptionally bad idea, the notion of moving students during a shooting event is a recipe for disaster.
I can hear it now...
Now class, those are gunshots and that is the active shooter alarm. We all need to leave our classroom and move out in the open, down the hall to Mrs. Johnson's class. She has a gun. Try not to get shot while you are on the move to her class as we aren't coming back for you. Steve, you will lead the class. When you get to Mrs. Johnson's room, tell her who you are and she will unlock and unbarricade her door and let us inside. We are going to move in a calm and orderly fashion. No running or screaming. Make sure you have your buddy. Everybody stay together. We don't want you getting lost in the confusion of all the shooting that is happening right now.