I stole the idea of playing Racko in my classroom from the wonderful @aeakland and her blog http://coefficientsofdeterminations.blogspot.com/ 🙂
Instead of playing Racko as a whole class, I decided to make my own Racko boards from cardboard that I got for free at Jo-Anns Fabric. I used the cardboard from the center of the material roles and it worked perfectly! I then cut 8 slits in each of them. I figured for my accelerated math they could order 8 rational numbers and my regular math class could order five. I laminated all of the playing cards so they are easier to slide in the cardboard. I plan on making more cards for when I teach positive and negative numbers on a number line.