The Virginia Student Threat Assessment Guidelines is listed in the federal government’s National Registry of Evidence-Based Programs and Practices (NREPP). Thousands of schools in more than 20 states have received training. The Guidelines have been evaluated in 2 field-test studies and 5 controlled studies published in refereed journals. These studies have found that schools using the Guidelines are able to resolve threats safely and effectively, allowing almost all students to return to school. Studies have also found that schools have lower suspension rates and fewer alternative school transfers, with no racial disparities for Black and Hispanic students. Students report fewer bullying incidents, greater willingness to seek help for bullying and threats of violence, and more positive perceptions of school climate than students in control group schools.These Guidelines allow school-based teams to evaluate student threats of violence, quickly resolve less serious transient threats and take appropriate action in response to more serious, substantive threats. School teams ordinarily consist of school administrators, mental health professionals (counselors, psychologists, social workers) and law enforcement officers.