So the TA for one of my classes is a complete airhead. She cannot explain anything if you ask her, and even when she has the answer book right in front of her she sometimes gives the wrong answer to questions during review sessions. I'm a good student (3.7 gpa), and this is a subject I know pretty well, yet even though I come away from tests feeling like I aced them, I only get scores around 85%. I don't have this problem in any other class, so I don't think it's just me. Today I found out that though my prof chooses which questions to put on the test, my TA writes the key for the scantron. This makes me very uneasy about the legitimacy of our scores in this class. I'm premed, so getting that A is kind of important, and it pisses me off to think I might get a B just because my TA is an idiot. Is there anything I can do about this?