This survey is a follow-up to a comprehensive survey of eighth- and tenth-grade public school students conducted in 1988. The 1990 sample includes over 3,400 students from rural, metropolitan, and mixed school districts. Data were collected using a 120-item questionnaire and compared to available information from the 1988 survey. The study highlights 12 health knowledge and behavior areas: (1) mental health; (2) suicide knowledge; (3) violence; (4) sexual attitudes and behavior; (5) forced sex; (6) contraceptive utilization by females and males; (7) pregnancy; (8) sexually transmitted disease knowledge; (9) HIV/AIDS knowledge; (10) alcohol use; (11) substance use; and (12) nutrition. Results indicate only minor changes in adolescent health behavior since 1988. Many of the students continue to engage in health risk behaviors which may have both long and short term effects. For most categories of risky health behavior, the rates for white and black students are similar. Adolescents from single parent families often reported higher rates of negative health behaviors than did students residing with both parents, but negative health behaviors were common among all groups. Based upon findings, a number of recommendations are made. (LL)