The Indian Education Office  at the Office of Superintendent of Public Instruction (OSPI) has published Tribal Sovereignty Curriculum.

http://www.k12.wa.us/IndianEd/TribalSovereignty/default.aspx

OSPI - Office of Superintendent of Public Instruction: The Indian Education Office: 
Our curriculum has been a true collaboration between many stakeholders within our Washington State. Our goal is to provide everyone's schools, students, Tribes, and communities with the resources that will enable them to have a better understanding of the numerous Tribes that are the foundation of Washington and the continuous contributions they make in the development of our state and your local communities.