Development is characterized by urbanization. New settlements grow either as enlargements of existing ones or as new population concentrations. Three periods may be distinguished in the growth of a settlement: (1) the wild period of first settling, (2) the consolidation period, and (3) the stabilized society. The number of school-aged children per population is greater in the wild and the consolidation periods than in the stabilized society. Therefore, the basic need for schools in the future fully developed society must be discussed while the school building program is still on paper. School planning authorities should base their decisions on (1) integrated statistics and forecasts, (2) educational output requirements, and (3) long-term economic feasibility assessments. In connection with the programming of actual schools to be built, planners must know: (1) program of requirements, (2) economic plan, and (3) plan of action. School building depends on the supply possibilities of building materials and the manufacturing of suitable components from indigenous raw materials. (Author/MLF)