Hogwarts may have the Sorting Hat, flying broomsticks, and a forest full of stuff that can totally kill you, but where magic school fails and where we succeed is that we have RateMyProfessors.com. RateMyProfessors is hands-down the best way to find out what's up with your college professors, just short of lurking outside classrooms and asking someone, "So what's up with this professor?" It's a review site by former students, for future students, and it's a hallmark of the college/university experience.
Is it perfect? No. I once took a class not solely because the reviews said the professor looked like Tom Hiddleston, but let's be honest, that's mostly why I took it. And he didn't look like Tom Hiddleston in the slightest. It was terrible. I felt cheated.
Still. Hogwarts, with its medley of magical faculty and its ever-changing rotation of Defense Against the Dark Arts professors, could use a little RMP action... and we felt obliged to answer the call.