I like duolingo and his idea behind it, one-on-one tutor is better than classroom setting! As a person with no academic background in education, My view of seeing education might be slightly different than my fellow classmates. I think education should be available to anyone who is willing to learn, instead of to anyone who enrols into school. Indeed, Duolingo and many other open source apps are promoting this idea. Therefore, with more new apps like Duolingo and Coursera, education in the 21st century is becoming more open and available. I would like to watch how duolingo help people master another language in the future.