Action:

• Ask students a question and ask them to respond by voting thumbs up or thumbs down. You can also ask questions with 3 options (thumbs sideways) or a variable scale. For example, “Does this make sense? Thumbs up for yes and thumbs down for no.”
• For questions about whether or not students understand a particular topic, it is safest to assume that non-voters are not sufficiently comfortable with the material.
• You can dynamically adjust the class and/or your explanations based upon student feedback.

Reason:

• It can be helpful to get frequent informal feedback from students to adjust the class pace or content.