The author describes physical conditions in the classroom--light, sound, color and touch, and space--that the educator can alter to improve human comfort and thus make the classroom a more pleasurable, effective place for both teacher and student. (Editor)

In this speech, the author traces the history of lighting in schools, discusses the variables affecting the amount of illuminance needed, and provides a table of illuminances recommended for Ontario schools. Other factors that affect vision--glare, veiling reflection, color, and brightness balance--are outlined. Planners are admonished to…