Chock full of information about water, the US Geological Survey's (USGS) Water Science for Schools is an enjoyable site for educators and students alike. From Water Basics to Special Topics, this easily navigable site teaches students about the importance of water in their everyday lives. Visitors confused about terminology can refer to the glossary, a tool that defines terms used within the site and in the water field in general. An activity center allows educators and students to apply their newly-gained knowledge. The picture gallery, which is divided into four categories for easy browsing, shows water in action as well as human and animal interactions with water.