Indoor air quality is a major concern for educators involved in the development of new school facilities, or the remodeling and maintenance of existing ones. This guide addresses the issue of air quality, the health concerns involved, and procedures for minimizing the impact of pollutants in the school environment. It defines common indoor air contaminants that are considered harmful and the steps for removing them, including tips on housekeeping, ventilation, and air filtration and purification systems. Concluding comments address specific school design considerations that can significantly affect indoor air quality. (GR)