From the Impact to Schools: "The absence of a well-developed, strategic, collaborative, and effective school safety plan can lead to violence and other unsafe and disruptive activities within a school setting. It is not solely the responsibility of schools to create and maintain a safe learning environment, free from the disruption gangs can cause, for students, faculty, and staff. To develop a comprehensive plan that identifies effective, evidence-based strategies to address gang issues in the school environment requires the involvement of law enforcement, school administrators and staff, and other key sectors of the community. The OJJDP [Office of Juvenile Justice and Delinquency Prevention] Comprehensive Gang Model highlights such a holistic approach by coordinating the roles of all agencies and organizations within a community that are responsible for addressing gang-related crime and violence."
National Gang Center: https://www.nationalgangcenter.gov/