Below are online resources where you can learn more:

U.S. Secret Service Safe School Initiative

U.S. Department of Education, Emergency Planning, Office of Safe and Healthy Students

Centers for Disease Control and Prevention

National Center for Mental Health Promotion and Youth Violence Prevention

The Safe Schools/Healthy Students Initiative

FBI: Campus Attacks: Targeted Violence Affecting Institutions of Higher Education

U.S. Department of Justice, Bureau of Justice Assistance, Guide for Preventing and Responding to School Violence