Engage students with a retelling of Eric Carle's "The Very Hungry Caterpillar" and watch a video from "Great Migrations" to enhance scientific discovery of the life of a butterfly.

Go directly to the classroom resources developed in conjunction with the four-part PBS documentary "Lewis and Clark: The Journey of the Corps of Discovery." Find 17 lesson plans and activities that comprise a multidisciplinary unit on...

An article on modern-day discoveries about the prehistoric coelacanth fish. Read about the geographic distribution, classification, fossil record, and economic and social impacts of the animal.