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Article
PBS

Pbs: The Native Americans

For Students 9th - 10th
The Corps of Discovery came into contact with "Nearly 50 Native American tribes." This site from PBS discusses the tribes that had the most significant interactions with Lewis and Clark.
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Website
Other

Chinook Nation: Homepage

For Students 9th - 10th
This current website for the Chinook Nation contains information on past and future events and tribal members.