instill in your kids the mechanics of the OODA loop:
Observe a perceived threat
Orient yourself to the threat
Decide on course of action
Act on your decision
teach them the difference between cover and concealment... cover will stop a bullet, concealment just hides your location
teach them that distance is your friend, especially if confronted with a pistol shooting threat... secondly, once distance has been reached...it is much harder to hit a moving target traversing laterally than directly away, and for inexperienced handgun shooters at distance, the muzzle is typically pulled off target away from the shooting hand... for right handers, it is typically pulled to the left, so teach them to run to the right