Rosenfeld suggests using headsets that plug into the computer's USB port, rather than its microphone jack or that use Bluetooth technology, which he says operate with an inferior sound quality.
Candice Hughes, a second-year online M.B.A. student at the Indiana University—Bloomington's Kelley School of Business, says she and her peers use Skype and Freeconferencecall.com for group discussions.
"These online technologies make it straightforward to learn at a distance," she says.
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