In a paper called "A Wearable Sensor for Unobtrusive, Long-term Assessment of Electrodermal Activity," published in IEEE Transactions on Biomedical Engineering, scientists measured the brain activity of a student for an entire week and found that there were mysterious periods of activity. More shocking, these periods of inactivity were not during sleep but during class. Yes, it's true. The student's brain was less active specifically during class than during sleep, or any other period of the day for that matter (and for an entire week). While the sampling is microscopically small, and the measurements un-reproduced, it is still an astonishing fact. Next time you teach, find a reason to get those student's brains at or above sleep state, preferably higher if you can muster it.
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