Diversity related dispositions (understanding, tolerance, and respect) of prospective teachers are crucial aspects of today's teacher preparation programs. Can prospective teachers challenge and change their diversity-related dispositions through the use of Teaching Tolerance's culturally responsive curriculum materials? Students watched the Teaching Tolerance video "The Shadow of Hate: A History of Intolerance in America," and responded in writing to 4 open-ended questions which prompted them to articulate the meaning of discrimination and to make connections between diversity, history, discrimination, and their future classroom practices. Based on the qualitative research reported in this article, using Teaching Tolerance Project curriculum materials in a teacher preparation program contributes to cultivating a cooperative, inclusive, egalitarian classroom. (Contains 1 table, 5 figures and 2 footnotes.)