This article summarizes the accomplishments of research on school safety in the past quarter century, identifies important gaps, and indicates promising directions for further progress. Although closely related, there are distinguishable bodies of research on physical and psychological safety. Physical safety research concerns the prevention of…

School resource officers' (SROs) presence (e.g., engagement in patrol, carrying firearms, etc.) and prevention (e.g., mentoring, teaching) roles have not been distinguished in investigations of SROs' association with student outcomes. A model predicting nonviolent incidents and serious violent incidents reported to police from SRO presence and…