Strict habitat requirements are needed for the survival of fish populations and fish variety in the Great Lakes. Young scientists become experts in the basic needs of fish and understand how survival necessities can vary with different...

Make your own bite-size glacier! A resource teaches about the formation and melting of ice. Activities include videos, a hands-on activity where your pupils build glaciers, and a photographic analysis to teach individuals the chilling...

The Crusades sounds like a glamorous time period in the Middle Ages full of glory—but was it? Scholars find and review the truth of the Crusades' influence on the world through the resource. The study guides, separated individually by...