Topics for next class
Student questions often go unanswered during a class discussion. Collect them before they slip way so you can discuss them during the next class.
More types of activities
Teams by color
Split your participants into teams by color. Future questions can then segment responses by team.
Competition
Ask a series of questions and declare a winner at the end for the person who scores the most points.
Team cohesion icebreaker
Encourage participants to think less about personal goals and more about team, company, or societal goals.