Who Were Your Best Teachers?
How about our Computer Architectures lecturer who took an angle grinder to a hard drive so we could see what the inside of one looked like?
Or the maths teacher, who whenever he taught us some maths, he would teach us all about the person who came up with it, their life, and usually how they were killed in some nasty circumstances. And sometimes we'd just have a class where he'd tell us all about whatever he was reading at the time, which included philosophy, sociology, and quantum physics. And we all got A's in maths!!!