Okay, so, this is how I do it. Each student has their name on 2 cards (each with a different color). When they come into the classroom in the morning, they place their name into 2 slots in my workstation pocket chart! During math, I call out one of the colors. They are to go to that station. Each station can have ONLY 2 people, so I have A LOT of workstations. This is how I organize it ... VERY simple.
This has been GOLDEN!Here they are in action!