These are a GREAT resource in the cooperative learning classroom.
I print these off 6 to a page on cardstock, laminate them, and put velcro on the back of them. I then velcro them to the corner of each desk so that they are all together in the middle of the table group!
Students can easily look at them to know if they are partner A or partner B.
These also help manage table jobs. For example: "Number 1s are in charge of stacking chairs today and Number 2s are in charge of picking up trash!"
Excellent for classroom management!