Of course, as always, any measurable difference in outcomes between groups is NEVER due to any actual difference in those groups. It's ALWAYS BadThink that causes it.
Men are more likely to be described as a star, knowledgeable, awesome or the best professor. Women are more likely to be described as bossy, disorganized, helpful, annoying or as playing favorites
Occam's Razor tells us to assume these descriptions are probably accurate. ThinkProgress tells us: the students are biased.