The research reported assesses the impact of a program on the change of ethnic attitudes of students. The Anthropology Curriculum Project's "Race, Caste and Prejudice," designed to enhance intergroup attitudes and behavior, is a supplementary secondary school unit of study, text and handbook, dealing with race, caste and prejudice from a cross-cultural anthropological standpoint employing student activities emphasizing affective involvement such as simulation and field research. The multimethod assessment of the materials employs statistical analysis and the technique of non-participant observation, or ethnography. The latter is composed of daily non-participant observation of classrooms, informal student and teacher feedback, unstructured interviews with a random sample of experimental group students and a formal teacher evaluation conference. Results from analysis of covariance reveal a significant difference in ethnic attitude changes as measured by a cognitive-affective scale. Through ethnographic analysis, the most influential factors in classroom interactions are found to be student sensitivity to the material and situation and the class ethnic composition. Other findings of teacher and student behavior and reactions are discussed, as are implications for further research. References are included. (Author/KSM)