A mini-lesson, which can often extend to a full class period, attacking student problems with homophones in a light-hearted way. Students work their way through an easy exercise with three of the most commonly messed up groups of homophones, then the class can participate in a humorous round-robin quest for more sets. I once got well over 100 sets on the board in 20 minutes of high-volume, high-energy total class participation. An assistant principal who wandered through the room--perhaps attracted by the hubbub--stayed for 10 minutes and got into the activity himself. This one really works and is a nice review that never failed to engage the entire class. It has worked for me in every grade from 7 to 12 and is helpful with both mainstream and second-language learners, ranging all the way through honors classes.