These are some VERY SIMPLE games you can add to your math centers at any time. I added them to my centers to increase fact fluency. They require MINIMAL materials-a deck of cards for the multiplication game and a sheet protector, dry erase marker and a timer(if you don't have any timers, your students can work in partners and keep track of time) for the multiplication chart challenge. SUPER EASY to add to your math centers! I've provided some directions and examples of how I have them set up in my classroom, but you can implement them however it works best for your class.