Active shooters in schools: Should teachers be trained by police firearms instructors?

Active shooters in schools: Should teachers be trained by police firearms instructors?: "Every school in the nation conducts two or three fire drills per year, despite the fact that not one single child has died from a school fire anywhere in North America in well over a half a century.

Yet, we almost universally ignore the threat which really is claiming the lives of our kids — active shooters"