December 14, 2013
by Dave McClintock
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Duolingo.com: Learn a Language, Translate the Web, for Free

In this TED video, Luis von AhnĀ of Carnegie Mellon introduces Duolingo.com, a free online language tutorial site that (in the background) uses your quiz answers to help translate the web. Massive online collaboration. Along the way, von Ahn explains reCAPTCHA … Continue reading