This is awesome. For someone that was having trouble with lessons in class, they could come here and get a ton of help very quickly. This is like 10 math books in one. You have a bunch of reliable information right at your finger tips. This is extremely effective for anyone, either for review or first time learning. It is easily understood and you can keep coming back to it again and again if you need more repetition. This gives the student just one more outlet to use and go to whenever they need help or even a refresher.
Time spent reviewing site:
I spent about 20 minutes browsing around at all the different lessons and information.