No gun for me, thanks...Maybe pepper spray or tasers like fellow teacher marcie suggested? (with proper training, of course)...I just hope and pray nothing like that ever happens at my school...
we have what are called "code blue" drills here... we are warned over the pa system that we need to go on lockdown ...the kids know that they need to find a classroom ASAP and the teacher knows she needs to put them in an area away from windows and doors...we are even going to be given emergency backpacks with materials in case lockdowns last long (water, flashlights, snacks, first aid, etc).
Obviously, this drill works when it's just practice, but who knows how well it well go if the real thing ever occurs...it really sucks that we have to worry about things like that nowadays...