When crocodiles close their mouths, you still see their teeth, but when alligators close their mouths, their teeth are hidden. Learn more about these reptiles and their many evolutionary cousins in a fact-filled presentation. It...

Upper elementary meteorologists take a glance at what a hurricane is and how it is formed. Because this does not get into the differences in air pressure that drive the associated winds, it may not be useful for older learners. The...

Arranged as an interactive lesson, this presentation focuses on the six world biomes. Upcoming biologists click on a specific biome and a slide lists its location, description, native plants, and animals. A quiz provides learners with...