A project to implement the theories of Jean Piaget in elementary school curricula, teacher inservice training, and college preservice training with 11 school districts, a college, and New York State Education Department was described in this paper. The change in the program scope from a teacher introduction to Piaget's theory focusing on acquisition of conservation and helping the teachers develop programs, to the approach of planning a total program which integrated Piagetian theory into the entire elementary program was traced. A pilot program consisted of 4 parts: a tape-slide presentation to be viewed by teachers, a summer workshop, a limited implementation of the program, and development of a plan for full implementation of Piaget's theory. The pilot program focused on logical-mathematical operations, specifically seriation, numeration, and classification. Plans for future development were also presented. (PS)