Throughout history, the growth of big cities has resulted in the destruction of ecosystems. In the case of Chicago, IL, a grassland that was once home to bison, deer, wolves, and foxes quickly became a booming city of over three million...

Sixth graders investigate the various types of pollutants found in water and ways to help prevent water pollution. Through a hands-on experiment, students create samples of polluted water by mixing water with vegetable oil, dirt,...

A Gallery Walk is a technique that allows small groups to visit different stations, where they examine and discuss materials about an overarching topic. Questions about rivers and fluvial processes are available in this resource;...