Duolingo - a massive online language learning environment - 0 views
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Seb Schmoller on 21 Sep 13According to Duolingo, which is the brainchild of the inventor of reCaptcha Luis von Ahn "Since its launch 15 months ago, Duolingo has reached 10 million students and become the most popular way to learn languages online. No ad campaign, no gimmicks; just your support and a mission of free language education for the world." See also http://en.wikipedia.org/wiki/Duolingo