www.collegeboard.com - Hosted by the organization that sponsors the SAT. On the site, you'll find the "SAT Question of the Day," as well as a "Skill Builders" section to help fine-tune your math and verbal skills. There are also sample questions from past tests along with an explanation of the correct answers to each question.
www.vocabulary.com - Vocabulary is extremely important in SAT exams, and you can brush up on your skills on this site. It houses 5,000 words (each with a brief definition) that you might encounter on an SAT.
www.testcaliber.com - Horizon Software has a complete online SAT practice exam that includes hints and reference tools.
Princeton Review - Offers a free version of the 30- question diagnostic test that it has on its CD-ROM. You have to register, but there is no cost or obligation.
stthomas.edu - Although its not specific to the SAT, the University of St. Thomas Study Guides and Strategies page has some excellent advice and tips.
www.schooldiscovery.com - Another extremely useful resource is Kathy Schrock's Guide for Educators, which has a "homework helper" section with links to all sorts of educational resources.