With the decline in enrollment in the early 1970's, many aerospace engineering departments had too few students to offer some required courses. At the University of Texas at Austin, a set of personalized system of instruction (PSI) materials for the aircraft performance, stability, and control course was developed. The paper includes a description of course materials, the circumstances under which they were used, and a discussion of the factors which affect the success or failure of this mode. (Author/CP)