Ratemyprofessor.com

A couple of years ago, two of my research students told me about RateMyProfessors.com, which is a great resource to see which of my colleagues were totally slammed by anonymous students, given chili peppers as a joke (which happens pretty frequently, and it's pretty funny to see how gets them), and so on.

Here are the ratings for Georgia Tech's math department. (Thankfully, nobody put me up there.)

Here is Georgia Tech's physics department.

Here is Caltech.