There is a variety of information available on the history and mission of the National Park Service that might be helpful in planning lessons.
Many parks around the system also have lesson plans and other information online, allowing students and teachers to explore the park system from the classroom. Lesson plans, education guides and general information for educators on history topics.
If you would like to learn more about the establishment and history of Nez Perce National Historical Park and Big Hole National Battlefield, there are administrative histories available here:
Did You Know?
Nez Perce National Historical Park has three sites used by the Lewis and Clark expedition - the Weippe Prairie (1805), Canoe Camp (1805), and Long Camp (1806). The Lolo Trail, the ancient travel route used by the expedition in 1805 and 06 is also included as a park site.