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TED: Luis von Ahn: Massive-scale online collaboration - Luis von Ahn (2011)

Games with a Purpose

Tools of Titans

Human Computation

The story behind Duolingo's mission

TEDTalks (video)

TEDTalks (hd)

School of Computer Science

SCS - Video

Luis von Ahn

School of Computer Science (Video)

2007 USENIX Annual Technical C

School of Computer Science - Video

Center for Information Technology Policy - Lectures

Center for Information Technology Policy