The Duolingo icon, Duo, is sick. It doesn't look like Tylenol or NyQuil can make Duo feel better. The only way Duo can heal is if you complete your lesson. As long as you leave Duo hanging, he's going ...
The music lesson offerings serve as Duolingo's latest subject expansion following the company's addition of a math-focused app last year. Duolingo is ready for its namesake platform to go up an octave ...
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