Simply put, Khan Academy should make an SAT Prep App for mobile.

1. Better functionality for those who don't have a laptop/computer.

2. Students are more likely to do practice, even if it's just 5 problems a day. Teens are on their phone all day, an app would make the practice seem more accessible and easy to do.

3. Students could do SAT Practice problems during their free time, without having to boot up a laptop to do it. Sort of like a more "on the go" experience.