The Comprehensive School Mathematics Program (CSMP) is a program of CEMREL, Inc., one of the national educational laboratories, and was funded by the National Institute of Education (NIE). Its major purpose is the development of curriculum materials for grades kindergarten through 6. In the fall of 1973, CSMP began a longitudinal pilot study of its program. In May 1978, a questionnaire was sent to all 42 fourth-grade teachers of CSMP, and interviews were conducted with some of them. Altogether, 34 of the teachers responded to at least some of the questions, either by questionnaire or interview. The questions dealt primarily with: 1) teacher experience; 2) teacher training, 3) implementation; 4) comparisons with other mathematics groups; and 5) program evaluation. It is noted teachers were generally positive about CSMP, but major criticisms were made by a few teachers on nearly every question. (MP)