Very nice - modest gains, but almost no cost. As an experiment, this quiz-with-funny-pictures is great. "Games" offer a new medium of expression, and are probably the "right tool for the job" for some problems. As this article shows, games might be particularly useful in education, if we can figure out creative ways to use them.
If you're interested in the idea of games-in-education, ExtraCredits has been running a very interesting (and fun) overview/exploration of this idea over the last few weeks:
If you're interested in the idea of games-in-education, ExtraCredits has been running a very interesting (and fun) overview/exploration of this idea over the last few weeks: