1: Create a Document You Can Use LaterIn many college courses, especially intro courses, the lecture content is a major subject of study. The professor distills the content into 40 or so well-crafted lectures, paying special attention to selecting those (and only those) points that are most important for you to know. Readings? Mere background. Discussion (or quiz or drill) sections? Most just go over the lecture or, if they have additional content, it too is distilled, this time by the TA. These professors and TAs are great! They do all the processing for you.
But then the lectures take on a life of their own. The lectures become Lectures. Unlike your high school teacher, who was content simply to sum up the reading and ask you a couple of questions to make sure you had done it, your college professor thinks he or she knows more than the guy who wrote the textbook. And that part of his or her job is to present his or her own take on the material only touched on in the textbook. Unless of course the professor has written the textbook, in which case he or she takes special pains to have the lectures go beyond the textbook (for otherwise why should you bother coming to the lecture at all, when you can get the same information at home?)
And if that weren't enough, once the professor has focused the learning experience on the Lectures, he or she feels free to take exam questions or paper topics straight out of these much-prized Lectures. Imagine that. The professor actually wants a return on his or her investment in these precious Lectures. So how are you going to study all the stuff your professor has been spouting out hour after hour? Need we answer? ...