Adolescent stage has an important task that learns to associate and has positive attitude with the opposite sex. However, media biased report and sex knowledge communicated insufficiently in family make teenagers to obtain incomplete comprehension of sexual knowledge that result in a sexual behavior before marriage, unmarried pregnancy, STDs, AIDS, and rape et al. This article explores school nurse how to apply tactics to establish correct sexual values for youngster. By way of PAHO and WHO propose policy that can prevent teenager from pregnancy and reduce STDs. We propose the conception of tertiary prevention of sexual health-promoting that enables school nurse to play a positive role in sexual education.