“…A greater involvement with school and extra-curricular activities is related to less sexual risk-taking, including later age at initial sexual experience and the use of contraception (Aspy et al, 2012;Kirby, 2002a). In a study analyzing self-reported sexual histories, adolescent girls who participated in extracurricular activities, volunteer clubs, and sports were less likely to be involved in sexual risk (Martyn & Martin, 2003). School involvement is a protective factor under PBT's behavior system (Jessor et al, 1998a(Jessor et al, , 1998b and is found to be associated with sexual risk behavior and mediated by the effect of family structure, class position, and race on youth sexual risk behavior (Ramirez-Valles et al, 1998).…”