Since some of you are concerned about your terms check comprehension, here is a good site (although it is based on a different textbook, there is a lot of overlap):
http://www.apstudent.com/ushistory/cards.php
For practice multiple choice items, this site provides instant feedback:
http://www.historyteacher.net/USQuizMainPage.htm
I’d bookmark these sites, if I were struggling, and I’d use them often!