National Geographic's MapMaker Interactive is a wonderful tool to use when introducing your hydrologists to the water cycle. Show your class Earth's oceans and the movement of water from place to place. Then, using a large colorful diagram, show them the movement of water from the surface to the atmosphere. Bring the instructional activity home by returning to the MapMaker to locate your city and examine the local features that transport water. Close by giving the classic assignment of writing a story about a water-droplet's journey through the water cycle. The MapMaker feature boosts this instructional activity up above average.