In Round 1, each has examined the contents of his bag and looked to see whether he is satisfied or not. One could not present its contents to others.
In Round 2, we have emptied our bags and showed the contents of the other and it looked at the things of others.
In Round 3, we have formed groups, each with 4 people and started
to trade within the group.
In round 4, we have started within the whole class to trade.
In all four rounds at the end of the satisfaction of the people on a scale (1 = dissatisfied, 5 = poor) to be recorded.
Here are the respective averages of all the rounds: Round 1
3.5
Round 2: 3.0
Round 3: 3.0
round 4: 4.0