I used to not understand why the SAT was supposed to be a predictor of how someone would do in a college program, but after checking the schedule of my college

I used to not understand why the SAT was supposed to be a predictor of how someone would do in a college program, but after checking the schedule of my college Chinese class and studying to memorize the material everyday, I've realized that the SAT is just like any midterm or final for a class, albeit a bit broader in subject. If someone studies for the SAT then they'll probably study for their classes. Then again I think I spent a total of seven different days (not 168 hours, just some time spread across seven non-consecutive-days) studying for the SAT, which is nothing compared to what I have to do now. If only I could go back in time and retake the test with my newfound knowledge.