Although medical students on clinical ward rotations receive a large part of their education from house officers, very often house officers themselves have had little formal preparation as teachers. Because students and teachers work closely together under special conditions, unique educational situations are created where much more than factual information is conveyed. Although some house officers are "natural" teachers, others find such activities uncomfortable or burdensome. Most people, however, can be taught to be effective teachers, and preparation for teaching and teaching itself are beneficial for house officers and their patients as well as their students. House officers who teach enjoy the rewards that all teachers know as well as several others which are particular to the setting in which they teach. Mechanisms are suggested to maintain and develop interest in house staff teaching.