While I wouldn't rule out the possibility of cheating (likely from listening in/observing other teams), I have had a few instances where individually all students on a team did poorly but then they worked out the correct answers in their teams. I have 10 teams so I'm able to circulate the room during the team test and listen in on the discussions. (This also discourages cheating.) I've seen this process at work and it's pretty amazing. On my last RAT of this semester, one team commented to me after class: "We all had different answers on our individual tests but managed to get 100% on the team test. That's pretty awesome!" I followed up by asking why they think that happened and they were able to specifically discuss their team decision-making process. It was pretty amazing to hear them debrief their experience.