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Lesson Plan
The Puzzle of Ice Age Americans
Students describe alternative theories for arrival of first humans to come to...
Tue, 12/01/2009 - 12:19
Lesson Plan
Tale of a Whale
Students exercise their observation skills to do some of the actual work of marine...
Tue, 11/24/2009 - 15:03
audio
Polar Bears: One Species at a Time
The Encyclopedia of Life brings us another installment of the podcast, One...
Tue, 06/28/2011 - 14:25