You can't measure someone's talent by their grades. A better measurement would be the grade divided by number of days that person has studied for the exam.

So top grade's O for 'Outstanding,'" Hermione was saying, "and then there's A-"
"No, E," George corrected her, "E for 'Exceeds Expectations.' And I've always thought Fred and I should've got E in everything, because we exceeded expectations just by turning up for the exams.

God blessed me with the talent to play ball, but you can't do anything without the grades.

I know that if I'd had to go and take an exam for acting, I wouldn't have got anywhere. You don't take exams for acting, you take your courage.

Not everyone who takes extra paper during exams write extra sense

Are the exams really de-culturalized?