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3. SQL Challenge: Gradebook 1st question

In the video that precedes the Gradebook Challenge, Pamela uses multiplication, subtraction, and the ROUND function to calculate target heart rates.

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3. Add a reset button, please!

You are correct.  On a real test, in a real school, with a real teacher, you can check all of your answers before submitting. Khan Academy .is not a real school.  It is a learning aid.  If a studen...

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2. Feature Requests and General Site Feedback
3. Add a reset button, please!

@Nathan: I can't speak for Evan, but, to me, the current Khan process seems like what would happen in school.  When you get answers wrong on a quiz or a test, you get a grade of less than 100%.  I ...

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2. Feature Requests and General Site Feedback
3. Add a reset button, please!

If you consider it practice, it is not a waste of time.  If you are getting questions wrong, clearly you need the practice.