Abstinence-only sexuality education doesn't work. There is little evidence that teens who participate in abstinence-only programs abstain from intercourse longer than others. It is known, however that when they do become sexually active, teens who received abstinence-only education often fail to use condoms or other contraceptives. In fact, 88 percent of students who pledged virginity in middle school and high school still engage in premarital sex. The students who break this pledge are less likely to use contraception at first intercourse, and they have similar rates of sexually transmitted infections as non-pledgers (Walters, 2005; Bearman and Brueckner, 2001). Meanwhile, students in comprehensive sexuality education classes do not engage in sexual activity more often or earlier, but do use contraception and practice safer sex more consistently when they become sexually active (AGI, 2003a; Jemmott, et al., 1998; Kirby, 1999; Kirby, 2000; NARAL, 1998).