Rates of students engaging in nonsuicidal self‐injury (NSSI) are rising and additional supports in the schools are needed (Nock, 2010, Ann Rev Clin Psychol, 6, 339–363; Stargell et al., 2017, Prof Sch Couns, 21, 37‐46). School psychologists, school counselors, and school nurses are key personnel in responding to self‐injurious behaviors within the school setting. The results of a practice‐based research project are described, in which school psychologists, school counselors, and school nurses participated in training to increase their self‐efficacy, knowledge, and response in regard to NSSI. The training provided information regarding best practice in responding to NSSI in youth (Hasking et al., 2016, Sch Psychol Int, 37(6), 644–663; Kanan et al., 2008, Sch Psychol Forum: Res Prac, 2, 67–79; Walsh & Muehlenkamp, 2013, Sch Psychol Forum: Res Prac, 7, 161–171). This exploratory study indicated that training positively impacted participants' perceived self‐efficacy and knowledge with respect to responding to youth who engage in NSSI. Handouts and resources for school‐based staff are included. Limitations and future directions are discussed.