GAINESVILLE, Fla. — On May 12, 2006, math teacher Paige Allison demonstrates for her high school algebra II class how a hand-held computer that randomly chooses whom to call on would work. Allison tested the effectiveness of using such a device as part of her dissertation research at the University of Florida. High school students who participated in a series of focus groups afterward said they were more likely to show up for class prepared and to concentrate on what the teacher said when they knew the computer could spell out their name at any time.

(University of Florida/Kristen Bartlett)
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