The green movement in school design encompasses many techniques to improve the environmental friendliness and energy efficiency of a facility. Some are more complicated than others--probably not many people can explain the intricacies of a geothermal heating system, or the specifics of how solar or wind energy is harnessed. Most people, however, can understand the energy-saving benefits of daylighting. They have seen it in their own homes: When the bright sky floods through their windows, they can get by with less artificial lighting. But to truly tap into all the benefits of daylighting in learning environments, including improved academic performance from students, designers have to use approaches more sophisticated than just adding more and larger windows, and letting the sunlight stream in. This article discusses daylighting as a fundamental part of a sustainable design strategy for schools and universities.