Here's a site that has a lot of information on centers all around the bay that offer Citizenship Test Preparation.

http://sfpl.org/index.php?pg=2000029501

Welcome!

Bay Area Citizenship Test Tutors­­­

Mission Statement

To aid ethnic minorities around the Bay Area in their effort to achieve citizenship of the United States through the means of tutoring in the areas of language, history, and other essential knowledge required, in a variety of different languages. To help those seeking American citizenship for economical, familial, or practical reasons.

http://www.iibayarea.org/index.php?option=com_content&view=article&id=58&Itemid=71 -Redwood City, San Francisco

http://www.ssf.net/index.aspx?NID=799 -South San Francisco