Run, Hide, Fight
With the recent school shootings so fresh in our minds,schools all across America are having active shooter drills. The main thing that these drills teach is Run, Hide, Fight.
Run
Run is pretty straightforward. If you have the chance to escape, do. Help others if possible, but if they are fighting against going leave them.
Hide
Hide is also straightforward. If there is no clear escape route, hide. Turn off all lights, cell phones, and lock the door.
Fight
You fight when there is no other option available. Fight and fight with aggression. Knock the shooter out if possible, then run away.