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Having to do already done exercises

Hi, I wonder why everytime I log in to continue doing my exercises, I have to complete again some exercises I have already done. Have I been missing anything? Thanks a million. Miguel

March 27, 2013

1 Comment


It is to make sure you keep revising old material.

If you click on the vocabulary tab at the top of your page you will see the following on the right hand side:

Spaced repetition

Duolingo’s algorithms figure out when you should practice words to get them into your long-term memory.

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