Building upon extensive research, Early Warning, Timely Response: A Guide to Safe Schools asserts that schools can prevent violence and its preceding behaviors by providing a supportive schoolwide climate and responding early to at-risk students' academic and behavioral problems. The Guide's fundamental premise is that none of its recommended policies or procedures should be used to harm or label children. It stresses developing climates that avert violence and its precursors, through prevention approaches, collaboration, and clear and effective policies. Early and imminent warning signs are highlighted, as are procedures for developing appropriate responses to warning signs, including interventions and crisis plans. The Guide's blueprint can be used and adapted to prevent violence and develop safe and effective schools and communities.