How can tolerance be a key word in the educational process? How can educators be helped to identify problems related to intolerance as soon as they are witnessed and formulate objectives adapted to their community and to their students? How can students be taught to accept human diversity, to manage conflicts and to act responsibly? The three units of this book, respectively aimed at teacher educators, elementary schools and secondary schools, attempt to answer these questions with selected study materials. To this end, a learning process that places tolerance in the framework of an education for peace, human rights and democracy, and which defines general teaching objectives, is provided through many themes for study and reflection, and examples of activities. These books are addressed to teachers, as well as teacher trainers, community actors, parents and social workers - in sum, to all those whose educational mission can contribute to opening a door onto peace. Author Biography: Betty Reardon is Director of the Peace Education Program at Teachers College, Columbia University, and was a member of the Council of the International Peace Research Association, the Council of the University of Peace and the International Jury of the UNESCO Prize for Peace Education. Previous publications include Women and Peace: Feminist Views of Global Security and Learning Peace: The Promise of Ecological and Cooperative Education