Chemistry professor announced in class today that the average grade on exam 2 was 52. "But don't worry about it," she said. "You've got lots of other chances to do well, and that exam covered the core of the course, so every year lots of people fail it."
To a teacher? When that is the average on the exam? It's a sign that something is wrong with instruction, perhaps with the exam. It's a sign that one should go back and re-teach or at least think about how one might change instruction and/or the test for next year's class. It's a sign that even those students who studied their asses off (me!) weren't adequately prepared for the test.
I'm pretty sure my grade on exam 2 was about average for the class, though I haven't gotten it back yet.