This review of literature on the aging process points out primary physiological and psychological changes in maturing adults which have implications for teachers of adults. Visual acuity and hearing decline during adult years and there is a general slowing down process of most bodily activities. Teachers should be aware of the need for good illumination, adequate seating arrangements, maintenance of comfortable physical surroundings, and a slower pace for the adult student. Reports show that although the power to learn is retained in maturing adults, there is a slowing up in the rate at which one can learn. Retention and recall, then, may decline with years, although interest and motivations may be heightened. Teachers of adults should attempt to adjust lessons to the learners' pace capacity; include summaries often; relate activities to the varied life experiences of the students; and be aware of the adult students' length of attention span. (pt)