You can use the Stepladder Technique when team discussion is unbalanced.
Here, ask each team member to think about the problem individually and, one at a time, introduce new ideas to an appointed group leader – without knowing what ideas have already been discussed.
The ideal scenario is for teams to arrive at a consensus decision where everyone's opinion is heard.
However, that doesn't always happen naturally: assertive people tend to get the most attention.
For example, ask them what the main differences between individual, team and official rankings were, and why.
This will provoke discussion about how teams arrive at decisions, which will make people think about the skills they must use in future team scenarios, such as listening.
After the first two people present their ideas, they discuss them together.
Then the leader adds a third person, who presents his or her ideas before hearing the previous input.
It builds skills such as creativity, negotiation and decision making, as well as communication and time management.
After the activity, teams should be better equipped to work together, and to think on their feet. Another question could be about how they kept their discussion focused.