For several years, the University of Massachusetts has been developing a series of introductory-level mathematics courses which place primary emphasis on the development of problem solving and conceptual skills. As the need arose for more instructors for this course, an instructor-training program was developed. This report describes the development of classroom observation techniques that are used not only as a basis for program and teacher evaluation, but also as a device for in-service training. Instructors use these observation schedules, which focus on use of class time and patterns of teacher/student interaction, to observe and give feedback to one another. They were developed for use in workshop-style classrooms in which the instructor spends a majority of class time monitoring students as they work cooperatively in small groups. The courses in the Basic Math program, the teaching method, and the training program are described. (MNS)