This manual is written for adults who work with teenagers and young adults. It is based on the experience of building the Youth Action Program (YAP) of the East Harlem (New York City) Block Schools. The manual begins with background information on the accomplishments and plans of YAP on its 10th anniversary, followed by a section on YAP's basic ideas about leadership development. The remainder of the manual is organized around seven elements that YAP views as essential in developing leaders. "Element One: Counteracting the Effects of Oppression" discusses negative aspects of "adultism" and ways to foster racial and cultural identity. "Element Two: Nurturance" deals with mutual appreciation, self-estimation, and mutual support. "Element Three: Building Leadership Concepts and Skills" describes steps in leadership development. "Element Four: Experiencing Success" reviews elements in individual and community transformation. "Element Five: Educating Young People About World Issues" presents a school curriculum designed to engender youth leadership. "Element Six: Overcoming Academic Deficiencies and Resolving Personal Hang-Ups" argues the importance of developing competitive academic skills and correcting negative and compulsive behaviors. "Element Seven: Organizing to Have Impact on the World" outlines youth-run community improvement projects and steps in organizing a political action campaign. (AF)