Why is the "Strengthen skills" useless for visual advancement

Using the "Strengthen skills" button just gives me various different sentences that duolingo says I'm "struggling" with. However, no matter how perfect I do it gives me the same exact things over and over again and doesn't strengthen my total spanish skills.

May 18, 2017


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Here is some usefull information about "Best Way to Make Your Tree Turn Gold and Stay Gold"

May 18, 2017

That should not happen look at wiki and FAQ in popular discussion and file bug report

May 18, 2017
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