Web 2.0 Flash cards

I just read an article on TechLearning.com by Jenn Farr on creating Web 2.0 flashcards (http://www.techlearning.com/article/16896) and thought I'd post the three online flash card sites that I checked out that I found easy to use. 
All of them also have a huge number of already created flash cards for students to use.




Try them out for yourselves and let students know about them. Besides looking up already created flash card sets, students can create their own for studying.