We've been playing this really fun game during math workshop. It's an actual, real live board game called Prime Climb. It's super cool because you can play with up to four people., everyone can be working on different kinds of math at the same time, there's neat strategy involved, and it's actually really fun. Check out the pictures below and the directions if you're interested in learning more about it. If you want to go all out, here's the link to get this board game for home.