At least until the last few years, the proportion of teenagers who hav
e had sex rose steadily, and they are more likely to use contraceptive
s than their earlier counterparts. Underlying this general trend has b
een an increase in sexual activity among young teens-ages 15 and under
-as well as middle-class and white teenagers. Contraceptive use has ri
sen also, probably because of the fear of AIDS and the increased sexua
l activity among white and middle-class teenagers. Because more teenag
ers were using contraceptives, the pregnancy rate per 1,000 sexually a
ctive teenagers actually declined during the 1980s, even as more teena
gers were having sex. Nevertheless, contraceptive use is far from perf
ect, leading to high levels of abortion, sexually transmitted diseases
, and nonmarital births. The challenge for school-based programs is to
pursue two simultaneous goals: lower the level of sexual activity and
raise the rate of contraceptive use among those who have sex.