This competency-based secondary learning guide on preventing teen pregnancy is part of a series that are adaptations of guides developed for adult consumer and homemaking education programs. The guides provide students with experiences that help them learn to do the following: make decisions; use creative approaches to solve problems; establish personal goals; communicate effectively; and apply management skills to situations faced as an individual, family member, student, and worker. Each learning guide includes the following sections: a general introduction and guidelines for using the material; a checklist for users for advance planning; introduction to the guide; specified competencies, with student outcomes/evaluations, definitions, key ideas, teacher strategies/methods, suggested student activities, sample assessments, and supplementary resources. Four competencies are addressed: predict the consequences for self, partner, and families in case of pregnancy; explain the reproductive systems; evaluate methods of birth control and prevention of sexually transmitted diseases; and determine the risks associated with sexually transmitted diseases and the procedures in diagnosis and treatment. Twenty-one supplements contain information and activity sheets on the following: feelings about parenting, child rearing costs, the juggling act, reproductive system, birth control, and sexually transmitted diseases. A bibliography contains 32 items. (YLB)