This study was undertaken to identify and organize meaningful and useful basic materials on transistor principles and applications, and to explore some of the elements required for adult teaching. It was limited to the apparent needs of information-seeking adults in greater Los Angeles who desired occupational skills. A literature review established that effective adult teaching requires participant centered classroom techniques. Then, to determine individual needs in transistors and related areas, a questionnaire was administered at the beginning of a course. Level of use, content, interest value, effectiveness for classroom use, practical applications, valid and up-to-date information, useful illustrations, and suitable question and problem material were designated as selection criteria for instructional materials, and the course outline was developed in accordance with these criteria and with questionnaire responses. It was recommended that adult transistor courses be broad in scope, practical, and articulated with more advanced studies, and used as a basis for industrial training, and that the course outline be used as a means of selection and evaluation. (ly)