“Our mission is to make the world one big study group,” says Phil Hill, chief executive of OpenStudy, a social-learning site that started as a project of Emory University and Georgia Tech.

The quote is in a recent article in The Chronicle of Higher Education, which lists up-and-coming sites that combine social networking and learning.

Some questions to think about in this vein: Do students prefer to share class notes online? Is it ethical to sell notes to classmates? Are professors subjecting themselves to unfettered criticism online? And do students actually use social networking sites to learn?

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