Hi everyone. I'm trying to come up with a good way for students to know what center they are supposed to be at and who is in their group. I have four groups (red, green, yellow, and blue). I was thinking of putting a colored bead on yarn for a necklace they can wear while we rotate through the centers. My TA seems to think that's not such a great idea because they'll play with it too much. Let me know if anyone has better suggestions. Thanks!