Most fish freeze to death when the water is too cold, yet some fish live in the Southern Ocean where the water is often below freezing. Scholars use two models representing the blood from most fish versus the blood from Antarctic fish....

Remind young historians that many technological advancements influenced the events of World War I. After analyzing technology's evolution through primary sources, discussing the changes over time, and watching various video clips,...

Herre is a lesson on divergent and convergent evolution. It has links to terrific video clips, an associate worksheet, and more. The analysis questions have been reviewed separately on Lesson Planet if you would like more information....

What makes up a habitat? Use this resource to engage first graders in the exploration of desert, wetland, forest, and ocean habitats. Youngsters classify plants and animals into the four distinct habitats through drawings and cutting and...