The purpose of this research was to develop an accurate description of the current involvement of law enforcement in schools. The researchers administered a school survey (Part 1) as well as a law enforcement survey (Part 2 and Part 3). The school survey was designed specifically for this research, but did incorporate items from previous surveys, particularly the School Survey on Crime and Safety and the National Assessment of School Resource Officer Programs Survey of School Principals. The school surveys were then sent out to a total of 3,156 school principals between January 2002 and May 2002. The researchers followed Dillman's mail survey design and received a total of 1,387 completed surveys. Surveys sent to the schools requested that each school identify their primary and secondary law enforcement providers. Surveys were then sent to those identified primary law enforcement agencies (Part 2) and secondary law enforcement agencies (Part 3) in August 2002. Part 2 and Part 3 each contain 3,156 cases which matches the original sample size of schools. For Part 2 and Part 3, a total of 1,508 law enforcement surveys were sent to both primary and secondary law enforcement agencies. The researchers received 1,060 completed surveys from the primary law enforcement agencies (Part 2) and 86 completed surveys from the secondary law enforcement agencies (Part 3). Part 1, School Survey Data, included a total of 309 variables pertaining to school characteristics, type of law enforcement relied on by the schools, school resource officers, frequency of public law enforcement activities, teaching activities of law enforcement officers, frequency of private security activities, safety plans and meetings with law enforcement, and crime/disorder in schools. Part 2, Primarily Relied Upon Law Enforcement Agency Survey Data, and Part 3, Secondarily Relied Upon Law Enforcement Agency Survey Data, each contain 161 variables relating to school resource officers, frequency of public law enforcement activities, teaching activities of law enforcement agencies, safety plans and meetings with schools, and crime/disorder in schools reported to police according to primary/secondary law enforcement.