Before going to lunch, I watched BROTHERS & SISTERS. Well, at least the pregnant-secret is now out in the open. Justin's failing grades didn't get mentioned.
I find that a completely ridiculous storyline, too. He's full of confidence that he "aced" his midterms, and he failed two, made D's on two others, and a C- on the last.
I don't know about anyone else, but I ALWAYS knew when I done well or poorly on an exam. The grade may have varied 5 points either way, especially if there were many/mostly essay questions, but never did I think I had "aced" something and ended up failing.