Book excerpt: For the millions of GPS owners who love their GPS units but don't know all they can do with them, this fun guide shows that a GPS can do a lot more than just calculate a location. Dozens of illustrated examples show how a GPS can be attached to a multitude of devices, including dogsleds, race cars, hot-air balloons, windsurfers, pet animals, ski racers, hockey players, and sailboats. Each example includes maps and photographs to inspire hobbyists, airline passengers, athletes, animal lovers, drivers, teachers, and students to track and map their activities. How to incorporate GPS mapping technology in the classroom in order to reinforce science, math, and geography curricula, provide the groundwork for project-based learning, and show students that their schoolwork is important and relevant is discussed.