Childhood bullying has become recognized as a significant, pervasive form of school violence. Because of its deleterious effect on both victims' and bullies' current and future functioning, it is imperative that school personnel such as counselors engage in assessment techniques as the 1st step in a coordinated, systemic antibullying effort. The authors discuss multiple methods and instruments to use in assessing bullying in schools and provide guidelines for counselors in choosing the appropriate measurement for their needs.