DARE is a drug abuse prevention program that focuses on teaching students skills for recognizing and resisting social pressures to use drugs. Taught by a uniformed police officer, the program consists of 17 lessons offered once a week for 45 to 50 minutes. Some previous DARE evaluations have shown positive results, others have shown negative results, and most have serious methodological flaws. The present study used a nonequivalent control group quasi- experimental design to study a program that took place during the 1989-90 school year. Pretests and posttests were administered approximately 20 weeks apart. Results revealed significant differences in the predicted direction for alcohol use in the last year, belief in prosocial norms, association with drug-using peers, positive peer association, attitudes against drug use, and assertiveness. No differences were found on cigarette, tobacco or marijuana use in the last year; the frequency of any drug use in the past month; attitudes about police; coping strategies; attachment and commitment to school; rebellious behavior; and self-esteem. Although replication studies would be desirable, finding a control group for a long-term evaluation will probably be impossible due to the use of drug prevention programs in nearly every school in the United States. Nevertheless, future research could compare specific programs with the kinds of low-level intervention that have consistently been shown to have no positive effects. If evaluations of DARE continue, a national survey instrument should be developed and used for all outcome evaluations. In addition, the use of peer leaders instead of police officers should be studied, both to save money and to make more officers available to respond to citizen calls. Tables, note, and 40 references