The learning environment and its interrelationship with educational policies and the coordinated planning and design of schools and their facilities are discussed in the light of the human organism or student. The problems and hazards of present learning environments are reviewed in conjunction with environmental control and its influence on school plant quality. Environmental criteria are included for the effects of the thermal, acoustic, and luminous environments on the learning process. Classroom space and flexible utilization are also discussed with regard to efficient and effective learning. Bibliographic citations are included. (TG)