An interdisciplinary course in problem solving, entitled "patterns of problem solving," and its unique peer program offered at the University of California, Los Angeles, are described. The emphasis in the subject matter and approach is to expose the student to the wide range of alternative problem solving techniques and to enable the student to use these methods in practical applications. The subjects and coverage are in large part dependent upon the instructor's prerogative. The 10 chapters of a text entitled "Patterns of Problem Solving," which was developed by Moshe F. Rubinstein specifically for the course, are outlined. The chapters cover numerous theories, methods, and procedures, including probability theory, the general process of constructing models, and the development of models for decision-making, optimization, and simulation of dynamic systems. The text is directed to the advanced undergraduate, graduate, or professional. A brief history of the development of the course is presented that notes that the course was introduced in 1969 and identified as Engineering 11. In 1973-74 students were used as instructors. Factors unique to Engineering 11 that resulted in the adoption of a peer program are noted, including the diverse nature of the course enrollment and the need to lessen time demands on faculty in order to attract prominent faculty members. Selection of peers, the objective of creating a good learning environment, and the use of a peer room, or lab, are described. (SW)