Here are a few more places to help you prepare for the citizenship exam.
Pass the U.S. Citizenship Exam. This page has sample sentences. http://passcitizenshipexam.com/
San Francisco Public Library Resource List. If you live in the Bay Area, this page offers a list of organizations that help with citizenship. http://sfpl.org/index.php?pg=2000029501
Citizenship Study Guide. A page with flash cards, practice questions, and maps. http://www.citizenshipstudyguide.com/
East Bay ESL is an English language school for adult students in the San Francisco East Bay.