Most school resource officers (SROs) are employees of municipal or county police agencies who are permanently assigned to one or more schools. Known also as "School Safety Officers," "Community Outreach Officers," and "School Liaison Officers," SROs are not synonymous with school security or school police departments because of their multifaceted teaching and advisory capabilities. This paper discusses the roles and responsibilities of SROs, presents the funding for SRO programs, and describes the effectiveness of SRO programs. (Contains 1 figure and 4 resources.)