Appropriate to "thank" a professor who artificially boosted your grade in a course? As in, some professors will give you a few extra points on your GPA for a course if they've seen that you worked really hard and that certain freak factors might have prevented you from getting the grade that they felt that you "deserved". While I'm grateful when that happens, it's awfully hard for me to tell them that. Because (a) they explicitly don't tell you that they boosted your grade, and that (b) it's always somewhat "weird" to thank people for giving you a good grade (since it's "you" who earned it). On the other hand, they do want to feel appreciated for these types of things. I mean, okay, the best situation is that you treat them nicely afterwards. Sometimes that's hard though (since they're busy and such).