It always bothered me because a grade should reflect the percentage of the material you actually learned. Not be just an accounting of how many hours you spent

It always bothered me because a grade should reflect the percentage of the material you actually learned. Not be just an accounting of how many hours you spent trying to learn it. Well, the argument in those cases is that tests aren't always a reliable indicator of the material being learned. Speaking from my experience, I was a great test taker in high school, and they rarely indicated my actual knowledge of the material. It's not hard for me to imagine plenty of students having the opposite problem.