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<p>Or, they study their butts off. I had an F throughout Calculus I because I failed two of the exams due to using the wrong methods or making miscalculations (with my former Calc professor, if you get even one of the steps wrong, such as forgetting to distribute the sign, you get points taken off for the entire problem). Studied my butt off for the final…ended up getting a B on the final and a C in the course, thanks to my professor replacing the lowest exam grade with the final exam grade. So just because someone has a D or F in the class doesn’t necessarily mean they’re going to fail the class.</p>