This is a Matrix that will help students organize the major Native American Tribes in the United States. It can be used with textbooks, encyclopedias, or informational videos. Students can use it alone or in "expert" groups to be shared with the whole class. When I used it, I divided up the class into tribes and let each group research one tribe then we shared and filled in our matrices as a class. You can also pull it up on a whiteboard to fill in together!