Handheld Devices Changing Classroom Dynamics

Students call them clickers -- handheld devices that let them respond instantly to a professor's question. The whole class can see results on an overhead readout and some say they increase student participation in discussions.
...Professor Ross Cheit put it to the students in his Ethics and Public Policy class at Brown University: Are you morally obliged to report cheating if you know about it? The room began to hum, but no one so much as raised a hand.
Still, within 90 seconds, Cheit had roughly 150 student responses displayed on an overhead screen, plotted as a multicolored bar graph -- 64 percent said yes, 35 percent, no.