PBS
Newton's Apple: Spotted Owls and Old Growth Forests
This site from Newton's Apple, which is a production of KTCA Twin Cities Public Television, provides insights, vocabulary, resources and a main activity on the subject of why owls are threatened.
Discovering Lewis & Clark
Discovering Lewis & Clark: Manholes on the Mo
Lewis writes about an encounter that Sergeant Ordway and Private Willard had with a gang of sawyers on the night of August 4, 1806, somewhere downstream from the mouth of the Milk River.