I really liked the TUTpup! I liked being able to compete against kids from all over the world. I think this would be a different way to have the kids practice multiplication and division without it being a worksheet. I wonder if there is some way I could get them to document which ones they played and their score. I think stations only work if you can hold kids accountable otherwise they just waste valuable instructional time.
I was checking out the Study Ladder and I LOVE this idea for use with kids they test out of a certain concept and can move on to differentiate for them. Also used for differentiated homework which is always tough!
My centers are not like rotate to the next one. I have a lot of independent activities and projects that the students move through. I like that I can customize this for students.