This study explores how the use of a surface-charge-based instructional approach affects introductory university level students' understanding of direct current (dc) circuits. The introduced teaching intervention includes electrostatics, surface-charge-based micro-models that explain the existence of an electric field inside the current-carrying…

The problem of determining the most energy-efficient strategy to use in approaching a traffic light that is sighted at an unknown phase in its cycle is discussed. Included are calculations, results, and conclusions. (KR)

Uneven economic growth, rapid population increases, and high costs of fossil fuels have caused much of the human race to experience an energy crisis. For the world's poor people the energy requirements consist mainly of firewood. This crisis will be aggravated further as population trends begin to overwhelm natural resources. Future demands for…

Energy issues have been the focus of scientists, science educators, politicians, historians, sociologists, and economists since the increase in fuel costs, passing of federal regulations on oil prices, changes in automobile standards, and increase in conservation measures. Many feel that educators have the responsibility of designing energy…

This set of 25 instructional modules was produced by a group of industrial arts teacher educators, local teachers, and supervisors from eastern United States. Topic areas of these modules include: societal implications of the energy situation; awareness of energy terms, supply, and use; assessment of conventional and selected renewable alternative…

This report deals with the importance of water to life. The physical characteristics of water, its distribution, and a number of current water-related problems are examined. The issue of water management is discussed, along with the ways water is made available for our many uses in life. The introductory essay, "Water in the Global…