Examined is the effectiveness of a smoking-prevention program in modifying high school students' attitudes and values in such categories as health, peer pressure, and social image as related to smoking. The intervention lasted four to six weeks within the framework of ninth- and tenth-grade biology classes. (Author/YP)

Survey responses from a stratified sample, across school type, of Israeli tenth graders (n=544) indicate that informal and nonformal science activities are associated with a distinctive commitment to science and science learning. Further, school conditions, home influences, and career aspirations appear to mediate the decision to participate in…