1. Közösség
2. SAT Questions and Feedback
3. Upgrading SAT experience

You can do this in the current system by resetting the test and then manually going through each section and inputting your answers. Also, you won't need to calculate your score yourself this way.

1. Közösség
2. SAT Questions and Feedback
3. Suggestions to Improve Khan Academy's SAT Prep Course

I think the mentioned features would make the SAT preparation too stressful for the student. Still, they will definitely be helpful.