We have recently completed the preparation of PSI materials (study guides and unit tests) for seven junior–senior level physics courses: Mechanics, Electricity and Magnetism, Atomic Physics, Mathematical Physics, Physics and Computers, Astrophysics, and Relativity. Three additional courses—Solid State Physics, Nuclear Physics, and Quantum Physics—have been prepared by our colleagues. These are all elective courses at our institution and tend to have relatively low enrollments. By preparing them in the PSI format we are able to offer all ten courses every semester for any number of students with efficient use of faculty. A description of our materials, our mode of operation, and the reactions of students, faculty, and administrators are presented.