Research has shown that nonverbal variables have a strong influence on classroom communication. This paper examines the way in which communication in the classroom is affected by the variables of distance, physical environment, facial expression, vocal cues, posture and gestures, touch, use of time, physical attractiveness, and dress. Each variable is separately discussed in terms of research into its actual and potential effects. The paper then calls for an approach to the study of classroom communication in which such variables are isolated and individually investigated. (GW)