How I Use It
I have used it as a rotation station, as long-term homework, and as a brain break. The students especially love when I play, so they can battle me and show off their levels.
It's a free tool that does have a pay-for-bonus package, which is nice, but not necessary to get all of the benefits out of it. I especially like how the reports are offered to teachers and parents without having to pay. Any product that is fun, free (or reasonably priced), and highly educational is a winner in my book.