It was theorized that successes and limitations of curricular improvement projects should provide cues for intelligent planning of subsequent curricular change. The authors reviewed the records kept at the East Central Indiana Curriculum Improvement Project Office. They interviewed those in policy making and administrative positions with the Project. They sent questionnaires to the principals, teachers, and pupils in the 13 schools involved in the Project. This data was examined with primary reference to the ideas of cultural change as presented in Felix Keesing's "Cultural Anthropology: The Science of Customs". An operational theory of change was observed. An attempt was made to identify the sources of ideas and the reasons for participation. A change in attitude toward curricular change was noted as a side-effect of the Project's activities. A short bibliography is appended. (JY)