To gather the information for this section, visits were made to each of ten major curriculum development projects. These were selected because of the impact which each has had on curriculum reform--past, present, and future. It was not possible to visit every project, and several of the more significant ones, such as the Greater Cleveland Mathematics Program, the Nuffield Project, and Patterns in Arithmetic, are not included in this section. Materials on the University of Illinois Arithmetic Project also are not included. The record of a press conference with Jean Piaget and Barbel Inhelder are, however, appended. Pertinent information on each project was briefly summarized, and notes made during the visit included as a preface to the taped interview with the director of each project. In this interview, his viewpoints about a dozen significant questions are recorded.