Duolingo's heart system only encourages me to get away from the course if I make too many mistakes.

"Plus learners are X times more likely to finish the Y course!", more like "If you punish your students by preventing them to make progress, they are more likely to give up :blobcatSurprised:"

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It's pronounced ʁaʁyʁe. And written RaRuRe, or R3 for short.
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