The brief reviews existing research on the implementation and effects of zero tolerance in the school setting; and it highlights rigorously evaluated, nonpunitive alternatives to zero tolerance that have shown greater promise in improving school safety and student outcomes. Nonpunitive programs that take a largely preventive approach to school discipline have been found to keep students and schools safe by reducing the need for harsh discipline. These programs take many forms, such as targeted behavioral supports for students who are at-risk for violent behavior, character education programs, or positive behavioral interventions and supports that are instituted schoolwide.