Divide the group into two teams. Give the teams a pile of blank cards and challenge them to write as many questions (and answers) as they can, in 15 minutes which cover the course content to date.

The trainer alternately selects a 'valid' question from one team and directs the question to the other team. The process continues until all 'valid' questions written by both teams have been asked.

The teams score one point for every question they answer correctly and another point for every one of their questions which is selected as 'valid' by the trainer.