THIS REPORT EXPLICATES THE PHYSICAL RELATIONSHIP OF THE CHILD TO HIS CLASSROOM ENVIRONMENT IN TERMS OF LIGHT CONTROL. THE STUDY SHOWS HOW SHADOWS, GLARE, INADEQUATE LIGHT DISTRIBUTION, DESKS AND DESK POSITIONS AFFECT THE CHILD'S PHYSIOLOGICAL AND PSYCHOLOGICAL WELL-BEING. A COMPARATIVE STUDY WAS MADE BETWEEN A CONTROL SCHOOL AND AN EXPERIMENTAL SCHOOL TO MEASURE LEARNING ACHIEVEMENT IN A LIGHT CONTROLLED AND NON-LIGHT CONTROLLED ENVIRONMENT. THE EFFECTS OF LIGHT DIFFUSION ON DESKS, CHALBOARDS, INTERIOR WALLS AND CEILINGS ARE EXAMINED IN RELATION TO THE CHILD'S VISION AND POSTURE. THE REPORT ALSO PRESENTS A STUDY ON THE RELATIONSHIP BETWEEN VISUAL, DENTAL AND POSTURE PROBLEMS AND BODY STRESS. THIS PUBLICATION IS ALSO AVAILABLE UPON REQUEST FROM AMERICAN SEATING COMPANY, GRAND RAPIDS, MICHIGAN. (GM)