Here is a link to the National Congress of American Indians. It describes the Tribal Council and how it is governed. 

The U.S. The Department of Indian Affairs has some good information, though some of it might be a little difficult in terms of reading level. 

Here is a docuseries showcasing success stories of self-governance from the Self-Governance Communication and Education Tribal Consortium.

Here is  an overview of tribal lands and federally recognized tribes, as well as the relationship of these tribes to the federal government fromUSA Facts, an aggregator of government data. 

A comprehensive list is Native American tribes (federally recognized)

Once again, Britannica School has some great info about this topic.

 The Colorado Encyclopedia includes this page,  which provides some in-depth information about the Indian reorganization Act of 1934. 

The Digital Public Library of America also provides a good overview.

An overview from the National Indian Gaming Commission

A link to Britannica providing an overview of gaming in Native American communities

Britannica School also has some good resources

“Native Perspectives on the 40th Anniversary of the American Indian Religious Freedom Act” from Smithsonian Magazine. 

An article from National Geographic that discusses the Native American Religious Freedom Act and other pieces of federal legislation that impacted the religious freedom of Native Americans.

This is a link to the 1978 American Indian Religious Freedom Act, including the 1994 amendment of the act.

A video from PBS describing the how many tribes see their water rights as "paper rights," which don't actually allow for access to water. 

A brief overview of Indian Water Rights Settlements.

A recent NPR article discussing questions around the Navajo Nation’s water rights. 

Account of the “Winters v. United States” decision in 1908.