The primary hypothesis to be tested is: Students attending middle schools who receive a multi-component HIV, STD, pregnancy prevention intervention will postpone sexual activity or reduce levels of current sexual activity relative to those in the comparison condition. The major dependent variables are proportion of students that are sexually active, and the proportion initiating sexual intercourse. Intentions to engage in sexual activity, number of times of unprotected sexual intercourse, and number of sexual partners will also be examined. Secondary hypotheses will examine the effect of the multi-component HIV, STD, and pregnancy prevention intervention on the student's knowledge, self-efficacy, attitudes, perceived norms, barriers, and communication with parents.