Have you ever dreaded grouping students into partners? I had a lot of complaints when I first started. Everyone wanted to be with his or her "BFF" and complained if it was anyone else. I put the power back in their hands. The cooperation clock allows students to pick people for each "hour." Then, all the teacher has to do is roll a 12-sided die. The number it lands on indicates what time/partnership. Students love it! It reduces complaining as well as groups students fast and efficiently.