The primary tool for the evaluation was the National Survey of Parents and Youth (NSPY), which is collecting initial and follow-up data from nationally representative samples of youth between 9 and 18 years old, as well as parents of these youth. This report presents analyses from the first seven waves of NSPY. Also included in the report are statistics on the level of exposure to messages achieved by the Media Campaign during Phase III. For Phase III, advertising space was purchased on television, radio, newspapers, magazines, billboards, transit ads, bus shelters, movie theaters, video rentals, Internet sites, Channel One broadcasts in schools, and other appropriate venues. The focus was on the negative consequences of marijuana use. The NSPY found that most parents and youth recalled exposure to campaign anti-drug messages. Overall, there was evidence of some favorable campaign effects on four of five parental belief and behavior outcome measures, including talking with children about drugs, doing fun activities with children, and beliefs about monitoring children. There was little evidence of direct favorable campaign effects on youth, either for the marijuana initiative period or for the campaign as a whole. 12 tables and 2 references