A major purpose of this study was to measure and compare the effectiveness of office procedures, model office, and cooperative office education courses in developing 12th grade students' office decision-making abilities as well as to compare their decision-making abilities with those of office supervisors and office workers. Two other purposes of the study were to observe the changes in students' perceptions of the office world of work and to measure and compare knowledge of business fundamentals. Some of the conclusions drawn from this study were that students completing a model office course make different decisions as a result of the course, while no such difference was observed for the other types of office training. All students showed changed perceptions of job knowledge, job qualifications and total office work with the highest scores made by students completing the model office course. A 22-item bibliography, the test instruments, and the tabulated data from the study are appended. (BP)