I made this little tutorial last year, showing how to subscribe to our Mathtrain.TV iTunes Podcast. It's FREE and new student/teacher videos from Room 211 will be delivered automatically to your computer. Any new homework videos will also come directly to you as they are uploaded!
Of course, you can also sync it with your ipod, ipad, iphone, itouch, i-whatever.
(We are in the Zune store too in case you are looking for something non-apple.)