http://visitidaho.org has links to educator resources.
National Park Service
Sponsored by the National Park Service, the Nez Perce Online Museum describes artifacts of the Nez Perce people. The Lewis and Clark Rediscovery Project provides articles and videos showing Nez Perce traditions and history related to the Lewis and Clark story.
Lewis and Clark Today
http://lewisandclark.today illustrates the locations, animals, plants, and people as recorded by the journal writers. The site features a different page each day starting August 30, 1803 and ending September 26, 1806. Students can experience the journey one day at a time.