In searching for ways of providing suitable school buildings, consideration should be given to the possibility of providing outdoor teaching space and of controlling environment in whole or in part by the planting of shade trees in a carefully controlled manner. Such trees, suitably located, will not only provide shade but may aid ventilation and reduce noise from external sources. From the standpoint of initial investment and consequent maintenance, they will invariably be found to be an inexpensive complement to normal constructional devices for shading, ventilation and sound insulation. Well planted sites can contribute to the visual amenity of the district in which the school is located, and the trees themselves may be used as living material in the study of botany in the school. It is hoped that the material presented here will encourage other countries to engage more vigorously in planting around school buildings. Topics discussed include--(1) functions of trees in relation to classroom environment, (2) planting and maintenance of trees, and (3) qualities of useful shade trees. Sketches, diagrams and photographs of sample situations and solutions are provided. (RK)