To meet the challenge of teaching safer sexual behavior to teens, peer education--individuals teaching others in their own or similar age group--is an effective teaching method. Teenagers report that they are more likely to listen and talk to their peers about sexuality issues than to their parents, guardians, or health care providers. Effective peer educators are able to change peer norms concerning risk-taking behavior and help themselves as well as other youth make healthy decisions about their lives. This publication examines the method of peer to peer education in four sections. Section 1 provides background information on the need for peer education programs. Section 2 presents five steps in developing and implementing a peer education program. Section 3 presents the conclusion to the guide and section 4 lists peer programs highlighted in the publication. (LL)