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    Plataformas educativas, Educatina, Tareasplus, Youtube, Sangakoo, khanacademy, Coursera, Duolingo, bussu, Live Mocha, Verbling, Hello Talk, Conversation Exchange, Academica, Rankings, FODA, DIY, Moocs, e learning, Opencourseware, plataformas comerciales y libres. (1)