Since the massacre at Virginia Tech in 2007, many colleges have begun using cellphones to warn the campus of potential threats. But Google and other companies offer services that make it easy to retrieve information from the Web via text message, worrying instructors and officials that students might use such services to cheat on tests.
Some professors are particularly concerned about ChaCha, a new service that allows users to text any question to a network of people who will answer it within minutes.
by Caitlin Moran