6 Illnesses That Keep Students Home Over the course of a K-12 education, a child will spend more than 15,000 hours at school. Classrooms, cafeterias, libraries, and gyms — even when cleaned to high standards — are reservoirs for biological and chemical contaminants. Free registration required to view this resource. Register today and receive free access to all our news and resources. Register now. Already a member? Log in Username: Password: Lost Password? Sponsored by:
