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 explore agriculture as it relates to crops over the course of a series of historical events. They read and create a timeline of the 50-year increments that depict important cause and effect events. Students then use...