Library of Congress: American Indians of the Pacific Northwest
this resource is incredible if you want to see detailed photos of tribes and topics including:
(if researching from home; username= port, password= oslis may be required)
DocsTeach: Native Americans in History. This resource includes ready made activities as well as primary source documents. A great deep way to engage students with the topic.
Washington State’s Since Time Immemorial Curriculum Celilo Falls and more
Salem-Keizer’s Indian Education Program: all the documents, resources and more available from the link below. This is about as thorough and accurate as it gets. Enjoy!