by Larry Gordon
Students who studied for 20 hours through the personalized lessons on Khan Academy showed an average 115-point increase between their earlier and preliminary PSAT/NMSQT exam and the actual SAT that colleges use to help decide admission offers, according to a study from the two groups. That improvement was reportedly double the average increase of students who did not use the Khan tutorials. A perfect score on the two parts of the SAT would be 1600 total.
