I agree. We should have a second chance. Most virtual schools all have it.

Hi!

We have a feature that can help your students attempt the exercises again without affecting their final score. If they make a mistake when answering an exercise, they can click on the "Start over" link and retry the exercise from the beginning. For more information about it, please take a look at the article "Update: Restart the practice activity you’re working on— introducing the “Start over” link!"

Hope this helps!

Like software similar to DeltaMath, no matter what you do on the first try, it gives you a second chance if you got your first chance incorrect. Khan Academy is a helpful learning tool, but if you had a 34-question Calculus BC Unit Test, it is very irritating if you accidentally err on the 33rd question and you are forced to start all over again. Another instance is that you slip your mouse and you inadvertently select an incorrect option and get it wrong. In addition, if Khan Academy provides a second chance to problems that are done wrong the first time, then there will be the opportunity to check and harvest something from the mistake you made on your first try, like a minimal error in your calculations. There is no need to start a test all over due to a trifling calculation error.

Totally agree. When the unit test has many questions, 'start over' is not very helpful. Something like this semicircle will be good. If the second try is correct, the circle will become green.