Dear Khan academy, thank you for adding the start over button! I used to have to intentionally flunk it to start again, but now I don't. 

But, there is a problem with the feature...

I keep trying to check my answer to one of the questions, frequently the final question, only to accidentally press "Start Over". It is very disheartening to lose all my progress by mistake!

Adding a pop-up (by the button) that asks you to confirm you want to reset, the same way video games ask you to confirm you're quitting, would save me and many others' progress!

I'm using all three "feature request" avenues, so hopefully Khan will listen!