Calvin and Hobbes by Bill Watterson for May 14, 1990
Calvin: I've come up with a new system for doing homework. I call it "effective time management," or "ETM" for short. I've drawn up a schedule for each school subject, and I use this kitchen timer to monitor my pace. Thanks to ETM, I'm much more efficient, and my work goes faster! ETM: RINGG! Calvin: There! My math minute is up! Set the clock for my spelling assignment, ok? Hobbes: Um, your schedule calls for smaller time increments than this clock can measure.