Meet Chegg, which has become the most valuable edtech company in America by connecting college students to test answers on demand.It’s called “chegging.” College students everywhere know what it means. “If I run out of time or I’m having problems on homework or an online quiz,” says Matt, a 19-year-old sophomore at Arizona State, “I can chegg it.”He means he can use Chegg Study, the $14.95-a-month service he buys from Chegg, a tech company whose stock price has more than tripled.