For the Indians of yesterday, sign language was a necessity; for American boys and girls of today sign language is fun...and useful, too. Whenever it is convenient to talk silently - on nature hikes, for instance, sign language is a great help. By practicing it and using it among your friends, you can soon develop great skill in an ancient art that is still used by the American Indians.
This book shows how to sign in Indian sign language. It's very informational and gives some background information on Indians. I would use this book in a lesson on Native Americans. I would have the kids learn and show the class a sentence using Indian sign language.