Effective peace education helps to create a transformation in the knowledge, skills, dispositions, and relationships of its students. Drawing on their experiences training teachers as part of Juegos de Paz, an education for peace program that received support from the Colombian National Program for Citizenship Competencies, the authors explore transformative peace education and identify four key lessons for practitioners. Data from focus groups, interviews, and personal reflections are used to illustrate these principles and lessons. Additionally, it is suggested that there may be some transferability of these principles across contexts, since the program studied was originally developed in North America for use in urban elementary schools and was successfully adapted for use in rural Colombia.