Helping students understand the journey that water takes to get to the taps in their house can be a daunting task.  The EPA has put together a great list of resources to help explain the water cycle and the ways that human activities can affect the water that we use for drinking, bathing, and cleaning.  Activities range from interactive presentations to printable science journals and hands on activities (building a classroom aquifer is one of my favorites!)

Subject: Science
Grade Level: K-12
Price: Free