The TEACH system was developed to provide inexpensive, effective, virtually instructorless instruction in programing. The TEACH system employed an interactive language, UNCL. Two full sections of the TEACH course were taught. The results of this experience suggested ways in which the research and development effort on the system should be continued and provided information for evaluating the effectiveness of the course. Pedagogically, the system appears to be successful; straightforward reimplementation should make it economically successful as well. An appendix contains a complete description of the UNCL interpreter. (Author/JY)