The new question-of-the-week is: What has been the best math lesson you have taught and why do you think it was so good? In Part One, Beth Kobett, Jill Henry, Avery Zachery, Cindy Garcia, Molly ...
Since its launch in 2011, Duolingo has become one of the most popular language teaching tools in the entire world, with over 500 million users learning to read and speak over 100 different languages.
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