Of course, when class is out of session, students are expected to keep in contact, work on group projects and study together.

WSJ: Traveling the Globe -- Just to Get to Class

However, recent work by Mathematica, an independent policy group, suggests that the Credo study is sound.

ECONOMIST: Education: Charting a better course | The

"Regardless of this firm's expertise on purely technical matters unrelated to policy formation, Ecology and Environment's participation in a trade association and lobbying effort in support of authorizing high-volume hydraulic fracturing in New York fundamentally disqualifies the firm and its work" for the DEC environmental impact study, Russ Haven of the New York Public Interest Research Group said in a statement released Wednesday.

WSJ: NY groups claim industry bias in fracking study