God bless her but the public schools have to train their people to evacuate, not huddle in corners waiting for the evil bastards. Teach your children to act. Escape , evade, run like hell to the nearest help. But do not encourage them to hide under beds or run upstairs and lock doors that can be broken open with one swift kick.
This video was posted on another board but I think everyone would benefit from watching it. Run, Hide, Fight.
http://www.youtube.com/watch?v=5VcSwejU2D0