US Government Publishing Office
Ben's Guide to u.s. Government: Becoming a u.s. Citizen
Provides the steps involved in the process of becoming a citizen of the United States.
CPALMS
Florida State University Cpalms: Florida Students: Citizenship: It All Starts Here!
Examines what citizenship is, the difference between a citizen by birth and a naturalized one, and the process for becoming a naturalized citizenship. A PDF file of the tutorial is available.