The National Science Teachers Association, in response to the emergence of new science curricula and the need for updated science facilities in the nation's public schools, convened a task force to develop guidelines for K-12 science facility design and use. This guide, a result of NSTA Task Force on Science Facilities and Equipment, includes information about planning facilities design; budget priorities; space considerations; general room and laboratory design; and furnishings for the laboratory/classroom specifically targeting K-5, middle, and high schools. It is designed to familiarize educators, administrators, and citizens with the stages of the planning process for new and renovated science facilities and provides specific, detailed information on many aspects of the planning and design phases. Additionally, chapters address current trends and future directions in science education and safety, accessibility, and legal guidelines. Appendices include discussions on solar energy for school facilities, equipment needs planning, checklists, a glossary of construction terms, and classroom dimensional considerations. (GR)