Citizenship

The U.S. Citizenship and Immigration Services (formally INS) Has guides for those
desiring to become citizens at their Office of Citizenship webpage.

From the webpage:

The Office of Citizenship is mandated by the Homeland Security Act of 2002 to promote instruction and training on citizenship rights and responsibilities and to provide immigrants with information and tools necessary to successfully integrate into American civic culture.Our primary focus will be on providing information and resources to immigrants at two key points in their journey towards civic integration: when they first become permanent residents and when they are ready and eligible to begin the formal naturalization process.