Whenever possible I always have my teams set up in groups of four. In an ideal classroom that's great, but as we all know that doesn't happen all the time. I never have a team of less than three or more than five. If I had the choice of having a team of three or five, I would say I like the team of three better. Why? Sometimes I feel like the fifth person gets left out. I like the team of three for a couple of reasons. One, I feel that buliding a relationship happens better in a smaller group. Also, I would rather have a team member doing double during a structure rather than having others sitting idle. Of course, when all is said and done, what works better for the students is what we all need to consider.
Here is a new set of signs that I created. I hang these from the ceiling to identify team numbers.
You can download them HERE from my TpT store for FREE!!