There is a statewide number to report threats but isn't specific to schools. The system is part of the states overall "See Something Say Something" campaign to report potential threats or hazards.
To report tips or information about suspicious activity or behavior, contact the Office of Homeland Security & Preparedness in one of the following methods:
Call 2-1-1 or the 24-hour, toll-free tip line:
Online Form ~ https://homelandsecurity.nj.gov/tips.html