We examined the effects of peer coaching, a method of supervising preservice teacher trainees who were learning to deliver direct instruction procedures to small groups of elementary-age students with mild disabilities. Coaches helped five low-performing trainees acquire effective teaching behaviors by (a) evaluating videotapes of their teaching performance, (b) meeting individually with trainees to review videotapes, (c) helping trainees evaluate their own performance, (d) providing feedback on effective and ineffective behaviors, (e) setting objectives for improved performance, and (f) periodically grading performance. The effects of peer coaching were examined in a multiple baseline design across trainees. Results indicated that peer coaching increased the effective teaching behaviors of five trainees.