This guide presents lessons that teach high school students the essential skills they will need to manage and resolve interpersonal conflict in creative, positive ways. Along the way, students will also explore diversity, power, and prejudice as they continue to develop greater emotional and social skillfulness. The curriculum encourages students to connect the concepts and skills taught in the lessons to their own personal experiences with conflict and peacemaking. Students learn to analyze conflict, deal with feelings more effectively, defuse anger, and negotiate and mediate interpersonal and group conflicts. They also learn how to build more positive intergroup relations and explore how they could use their new skills and understandings to make a positive difference in their communities. The guide features: 36 core skill lessons; an exploration of eight different implementation models; in-depth information on how to infuse conflict resolution into the standard high school curriculum; ideas for assessing student learning; and nine additional, multi-period activities for taking the skills and concepts further. The seven appendixes offer: gathering and closing activities; grouping strategies; guidelines for role playing; a sample infusion lesson; a course assessment questionnaire; and related resources. (SM)