How we invented a new way to teach one of the most difficult languages to learn http://making.duolingo.com/how-we-invented-a-new-way-to-teach-one-of-the-most-difficult-languages-to-learn …
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
How we invented a new way to teach one of the most difficult languages to learn http://making.duolingo.com/how-we-invented-a-new-way-to-teach-one-of-the-most-difficult-languages-to-learn …