Results of a 3-year evaluation of a national law-related education (LRE) project involving five organizations (the American Bar Association, the Constitutional Rights Foundation, Law in a Free Society, the National Institute for Citizen Education in the Law, and the Phi Alpha Delta Public Service Center) are presented. Beginning in 1981, evaluators observed 69 LRE classrooms in 36 schools, concentrating on the impact of delinquency prevention objectives. The first of four sections discusses the goals of LRE, the relationship between LRE and delinquency prevention, and observed trends in implementation and outcome since the program began. The second section focuses on research methodology, including data collection procedures, classroom impact evaluation, classroom observations, observations of teacher training, and analyses of institutionalization. Findings in the third section show that there were measured improvements in each succeeding year of key aspects of the program: teacher training, administrative support, classroom practices, and student outcomes. The final section concludes that LRE can serve as a deterrent to delinquency if properly implemented. Recommendations for proper implementation include (1) adequate preparation and use of outside resource persons, (2) adequate quality and quantity of instruction, (3) judicious selection and presentation of illustrated material, (4) active student participation and interaction, (5) professional peer support for teachers, and (6) involvement of building administrators. Appendices containing 16 instruments used in the evaluation and data tables conclude the report. (LH)