This game is super easy to print, laminate, cut, and throw into your math rotations. It can be done independently during guided math, but also with partners. When I start utilizing these next year, I am going to throw in a timer or hour-glass so that students can try to "beat the clock" and get these guys matched up.
It's free, so download now if you think that it might be helpful in your classroom next year! Then go do something fun and summery, like drink a margarita while pool-side :-)