Another helpful vocabulary tool. It was developed by college faculty and uses the most efficient ways to study vocabulary.
You can choose to study for a particular test (ACT, SAT, GRE) or select "general vocabulary." In the beginning you take short quizzes to see what words you already know and build a list of words you don't know. Then you can review those words online or download them to your MP3 player manually or subscribe to your own personal podcast.
It's a pretty cool & easy way to build vocabulary.
This is the video demo that explains the site (if you're on campus you won't be able to view this YouTube video):