Project Support, a 3-year project funded by the federal government, was designed as a demonstration of the impact of a comprehensive school-based drug and gang prevention program for high-risk students in six elementary schools in Los Angeles (California). In addition to providing some programs for entire grade levels, the program planned to identify 250 to 300 students on which to concentrate services. This report is the final evaluation report of the 3 years. Major strategies involved in this project were: (1) drug and gang policy awareness; (2) drug and gang prevention education; (3) multiracial and multicultural sensitivity development; (4) conflict resolution; (5) after school alternative programming; (6) tutoring and mentoring services; (7) community service; (8) career awareness; (9) early intervention counseling; and (10) relevant parent education. Crimes against person and property at project schools decreased 41% during the project period, and attendance improved by 4.6% for the targeted group. Reading achievement scores increased by 12.3% for the targeted group, and mathematics and language arts improved by 12.1% and 9.5% respectively. Pretest and posttest data on 974 students showed that the project produced gains in self-esteem and pro-school attitudes. Administrators and teachers saw merit in the program and advocated its continuation. An appendix presents four survey instruments from the study. (Contains 2 charts and 11 tables.) (SLD)