What do a sleek blue whale and a prickly sea urchin have in common?
They both live in California coastal ecosystems! From help for kelp to coastal critters, Discover California Coastal Ecosystems shows why the coast is the most. Fun-filled activities teach students about the biology, ecology and history of the shores of the Golden State. Learn More
Learn all about the river marking the boundary between the U.S. and Mexico. From its explorer's journal to its descriptions of habitats and wide range of activities, it’s a great teaching tool in any language. Learn More
Flowing through three states—Wyoming, Montana and North Dakota—and a headwater tributary of the Missouri and Mississippi rivers, the Yellowstone River is the longest undammed river in the continental United States. Learn More