Consider that most states specifically outlaw gun possession on school grounds and court houses, and that would negate the premise absent legal statute changes, which is not likely. Secondly, when a person is only lightly trained and may not possess the ability to take another's life in defense of others, they learn of this the same time that the assailant does. Lastly, with gang activity in our schools there is the possibility if an armed administrator being overwhelmed and disarmed by students. Knowing they are children may affect one's decision making process regarding weapon retention and stopping a threat posed by children. Anyone who comes to a school armed intends to die there, so their commitment to their agenda is irreversible. An administrator with any amount of hesitation will become part of the problem and could run the risk of friendly fire from responding law enforcement. This is a complex issue and not one likely to be corrected on the internet.