A cross-sectional, Web-based survey was completed by 250 members of the School Social Work Association of America. This article addresses the research-practice gap in the delivery of mental health services in the school setting by examining the extent to which evidence-supported school violence intervention programs (ESPs) are known and used by school social workers. Despite 98.8 percent of respondents being aware of at least one ESP, only 72.4 percent reported using an ESP during the last three years. Perceived effectiveness of intervention programs and fidelity to curricular protocol were also examined. Using blocks of variables, two hypotheses were tested through multiple regression analysis: (1) Reported level of violence and practitioner capabilities will predict practitioner awareness of ESPs. (2) Reported level of violence, practitioner capabilities, and awareness of evidence-supported programs will predict use of ESPs. As expected, the greater a practitioner's time addressing violence, years of experience, confidence about successfully implementing violence intervention programs, and familiarity with the term "evidence-supported program," the greater his or her reported awareness of ESPs. In addition, the higher the practitioner's level of preparedness to effectively respond to school violence and awareness of ESPs, the greater his or her reported use of ESPs.