Hi, I have started to use Khan Academy for my SAT prep recently and have noticed a few areas of improvement. 

Each topic is assigned a level based on your performance in these topics' questions. I feel that having only 4 levels limits and generalizes the performance of the student. I have done 3 Full tests on Khan Academy and feel that after attempting so many questions, I would really like a more detailed specific feedback. I am aiming for a 1500+ score and currently got 1370 in my most recent test. The feedback by Khan Academy shows that both, my Reading/W&L and Math levels are 4.. However, I am not satisfied with them. It also shows 4 for many topics that I may not have mastered completely yet. To get a 1500+ score, the student has to be very thorough in his reviewing and learning. By having only 4 levels, this is hardly achieved. Having maybe around 10 levels total will be very beneficial.

That may create a problem for giving Feedback to those who haven't done many questions. This can be overcome by initially starting with only 4 levels then jumping or gradually increasing to more levels as more data to analyse arrives.. 

Please give my feedback some thought.

Thank you!