Purdue University, in Indiana, developed its own backchannel system, Hot Seat, two years ago, at a cost of $84,000. It lets students post comments and questions, which can be read on laptops or smartphones or projected on a large screen. Sugato Chakravarty, who lectures about personal finance, pauses to answer those that have been “voted up” by his audience.
Before Hot Seat, “I could never get people to speak up,” Professor Chakravarty said. “Everybody’s intimidated.”
“It’s clear to me,” he added, “that absent this kind of social media interaction, there are things students think about that normally they’d never say.”