Gendered expectations in teaching
[T]he expectations of how a male versus female instructor will behave are actually quite different. One of the papers I read discussed the fact that they interviewed students after they filled out evaluations (where a male versus a female teacher were rated and came out the same, quantitatively). It turns out that while the teachers were rated the same, the students have obvious differences in expectations. It came out that female instructors were available outside of class for more time than male instructors, but that they were still viewed as not being sufficiently accessible outside of class. In other words, students expected that female instructors should be willing to put in more time outside of class to help students in order to rate as well as male instructors who put in less time. If you think about the implications, it basically means that women will often have to do more work to get the same ratings.