This supplement is based largely on the Social Influences Model—the drug education approach that has been shown to be most effective for junior high school students by research over the past 25 years. This model sees adolescent use of substances as the result of influences from peers, the media, and the general culture. These social influences take the form of messages that appear to condone substance use, for example: modeling of alcohol and other drug use by peers and media personalities, persuasive advertising appeals, and/or direct offers by peers to use substances. For the purposes of this supplement, personal influences stemming from normal adolescent development (e.g., need for independence, to experience risk) are also viewed as an important source of influence. This model aims to create greater awareness of these three spheres of influence — personal, social or interpersonal, and cultural or environmental — and to develop skills to analyze and minimize their impact.