Self-instructional Material (SIM) is the mainstay of distance education in any situation. However, the pedagogic effectiveness of it must be ensured before it is supplied to learners. This becomes absolutely imperative in a discipline like Medicine where human
lives are involved. Tejinder Singh presents here one of the ways of evaluating SIM in medicine. His findings should encourage those who are involved in the developmental testing and evaluation of SLMs, not onIy in the field of Medicine but also in other disciplines too.