When is it OK for police to be called to a school?

The Collingswood school system has been thrust into a national debate on what role police should play in keeping students safe in school.

A policy that required the Camden County school district to call police for nearly every incident of student misbehavior raised new concerns about the appropriate involvement of police in school discipline.

Recently, students in Collingswood have been questioned by law enforcement for incidents such as roughhousing on the way to the cafeteria, allegedly making a racist comment at a third-grade class party, and a playground fight between two middle-school boys.

http://www.philly.com/philly/education/20160703_When_is_it_OK_for_police_to_be_called_to_a_school_.html