A page on the General Electric Lighting Web site has four lessons about the history, technology, mathematics, and science of light. Mainly intended for elementary or middle school students, the material is divided into short articles, hands-on activities, and experiments. The lessons teach students how to identify different kinds of light bulbs, choose the most efficient bulb for different environments, and explain how modern lighting systems work. After completing the lessons, students can take the School Lighting Challenge. This useful activity helps students determine how much money is spent to light different rooms of their school. It also shows how more efficient lighting practices could save energy and money.