School counselors need to have accurate and age-appropriate prevention education information in order to counsel teens on drug use. This article presents developmentally specific prevention materials for the most important emerging substances of abuse: Ecstasy, methamphetamine, cough and cold medication, prescription opiates and stimulants, and the "date rape" drugs. Because developing appropriate materials requires understanding how adolescents develop, an expert panel approach was used, supplemented with a literature review and teen focus groups.