I never got very good grades in school. I read a whole lot of books on my own, so some teachers were cool with me. Later in life to get into uni I had a choice

I never got very good grades in school. I read a whole lot of books on my own, so some teachers were cool with me. Later in life to get into uni I had a choice between slogging through and improving my grades in all thoss long forgotten, irrelevant subjects, or...study for one, standardized multiple choice exam. I chose the latter, broke open a (few dollars in cost) prep book, and got a high percentile result. What's better for a young person who zoned out in high school? In many cases it may be the standardized one time exam.