My Take
The big picture for this website is practice, practice, practice. There is not much there for deeper levels of understanding or enrichment, but the students will love challenging each other to some very fun and addictive games where they will practice their math facts over and over again without realizing it. As the students start to get more and more problems correct, it will give them more challenging problems from simple adding, subtracting, multiplying and dividing, to the use of decimals and percents, all the way up through expanding and simplifying algebraic equations.
How I Use It
I use in class to practice math facts in a fun way. The students really got into challenging each other in the wide array of games. The website also will issue competitions occasionally. The only problem that I have run into is making sure that the students are spending their time playing the games and not using most of the time buying outfits for their avatar with the coins that they collect for completing the games.