Comment There's no second chance for final exams (Score 1) 554
If you want to complain about having crappy students taking space, complain about grade inflation, and the propensity of graders to "curve." Why should everyone's grade go up because there were a lot of mediocre grades? Either you think your evaluation was unfair, in which case you need to give them a fair one, or your evaluation was fair and everyone sucked, in which case they need to get the grades they deserve.
Okay. A professor starts marking final exams and realizes that their exam was too difficult because the entire class failed*. When will this second, "fair" evaluation of the class take place? In the interim between terms? When the new semester starts? Either way, I doubt students will enjoy being called back into a class that should be over and done with because the prof made the exam too difficult, and is now obligated to give a "fair" one.
I don't know what field you TA'd in, but in physics it's bloody hard for a prof to create a "fair" exam. To make a long diatribe short, usually a prof has to either err on the side of making the exam too easy or too difficult, and they always choose "too difficult" because low marks still yield meaningful data about student capabilities. (i.e., it's hard to grade students fairly when everyone scores 100% on the final.)
So, regardless of how you feel about the matter, there's a good reason why grade curves exist.
* Not a hypothetical situation. This has happened at my university.