Hey, this is feedback, KHAN ACADEMY DIGITAL SAT: when attempting these little quizzes/exercises, I think it's best if it doesn't make the little *ding* noise and show you whether you're right or wrong immediately, instead finish the session and mandate a go-through of all the wrong questions. Because when I go back and write the bluebook tests, I subconsciously keep waiting for the little ding and a green or red sign indicating whether I'm right or wrong! 
And, Khan Academy being the best resource currently available for digital SAT, most people are using it, it would be really helpful to eliminate this feature or have an off and on button. It really distracts me during my mock tests.....
It would create a better mock test/practice environment as these little exercises take up most of our khan academy practice time.