Case studies are presented for seven Los Angeles area (California) high schools that worked with Pepperdine University in the IBM/ETS (International Business Machines/Educational Testing Service) Model Schools program, a project which provided training for selected secondary school teachers in the use of personal computers and selected software as aids to learning. The major purpose was to determine how microcomputers and software could be used to assist in the existing instructional process at the secondary level. An introduction briefly describes the IBM/ETS Model Schools program objectives, research methods, and techniques used for the case studies. Information is then presented for each of the schools, including the educational setting, microcomputer laboratory set-up, and a description of the computer applications that were developed. In addition, major issues that emerged from the project are discussed for each school: hardware, software, teacher training, time requirements, applications versus programming, school support, and school culture. Recommendations are presented for those planning or developing microcomputer programs in secondary schools, and eight applications that were developed in the IBM/ETS project are described. These applications used word processing (2), communications (1), a database management system (2), a database and graphics (1), and an electronic spreadsheet (2). A report on a formal course offering that is now part of the Pepperdine University Master of Science Degree in Educational Computing concludes the report. Lists of core software and software options and an outline of a computer curriculum module are appended. (JB)