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
Audience consensus
Find out the degree to which participants agree with a conclusion on a sliding scale clickable image.
Competition
Ask a series of questions and declare a winner at the end for the person who scores the most points.
Team idea prioritization
After a brainstorming session, input all ideas and ask participants to rank them in order of relevance.