The National Museum of the American Indian (http://www.nmai.si.edu/ ) has created some excellent resources for teaching about Native Americans in schools. Their resources are well-researched and use Indigenous sources. Below are some pages that I think are especially useful. I also heartily recommend a look at the other resources they have available on their website.
Poem and tasks - Indigenous peoples and environmental issues
Map of three Australian rabbit-proof fences. This pest-exclusion barrier system was completed in 1907 at a cost of Despite its continent-spanning mile length, it is only the second-longest fence in Australia