I have refrained from commenting untill some replies were posted, but IMHO :
I think it is a sad commentary upon our society, that we as a nation, being the most prosperous and powerful country in the world, have allowed our educational system to decay to the point that we need armed police in our schools.
That being said, part of the blame also rests with the government methodically turning our schools into socialist indoctrination training centers.
We pay good money for the schools to teach our children English composition, Algebra, History, Civics, Etc...
Instead, they teach our children about alternative lifestyles, Islam, sex, Godlessness, and that big brother is fully in charge.