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1. Topluluk
2. Computing Platform Community Discussions
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.

1. Topluluk
2. Feature Requests and General Site Feedback
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...

1. Topluluk
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 ...

1. Topluluk
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.