In my university, you have to take Calc I, even if you took it in high school. There's a different class for it, but it's still just good old calc I. And everyone in that class writes down everything the teacher says. Even that the derivitave is the slope of the tangent line. WHY? If, at the end of the semester, you don't know that, after already having taken calculus, and after another semester of it, you'll be lucky to pass. But I looked around, and I was THE ONLY PERSON who didn't copy it down. Why the heck do people copy so many darn notes? Even when it's obviously pointless? I have always wondered this.