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Why do challenges sometimes contain skills I’ve already mastered?

 

We include these skills to help you review what you’ve learned and ensure that you remember it.

  • If you answer multiple review questions on the same skill incorrectly, your mastery level may go down. The goal isn’t to penalize you; it’s to help you identify skills you may have forgotten so you can brush up on them.
  • If you answer a review question correctly, you’ll see that skill less often in future challenges.

 

See also:

The Mastery System
What is the mastery system?
What do Khan Academy’s mastery levels mean?
How does Khan Academy measure my math knowledge?
How can I see which skills I’ve mastered?
How does the mastery system help Khan Academy personalize my learning experience?

 

Last updated September 30, 2017 

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