What are you prepared to do in the event of a mass shooting?

As shooting incidents seem to become more frequent what have you prepared yourself and your family to do should you ever be involved with an 'active shooter' in a public place? I have a friend (single mom veteran) who will be transferring to an online college program rather than risk dealing with a loner-loser who might 'go off' in a classroom? Suggestions on how best to prepare? Google 'bulletproof blankets' which are available for students.

http://www.washingtontimes.com/news/2015/oct/2/chris-mintz-heroic-army-veteran-was-shot-7-times-a/