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. The partnership between the College Board and the online Khan Academy in offering free SAT prep tutorials has helped boost scores significantly on that widely used college entrance exam, the organizations announced Monday.
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