Earlier quoted context omitted.
SAT prep courses advertise that they can increase scores by 100 points but generally they're lying in order to sell more test courses. But the real number is closer to "11 to 15 points on the math section and 6 to 9 points on the verbal."[1] [1] https://www.researchgate.net/publication/228337033_Using_Lin...
As a former SAT tutor (and a guy who gamed the hell out of the SAT) I have trouble believing that. There are only a few classes of questions they ask on the test, and if you master them the whole test is a walk in the park. Maybe the problem is most students just don't give a damn about the classes their parents make them take? Can someone explain the findings in this paper?
That said, typically saw increases well above that in my classes. Even with zero instruction I’d expect a self studying student to improve more than that from familiarization.
It did say upper class people improve more.