Well, you can sit there in class with the expectation "teach me", "teach me", "teach me". And if the professor doesn't shove it up your behind you can lament your fate after class, labeling the professor a presenter or pretender or whatever.
Or you can sit there in class with the attitude "lets see what this guy tells me I should know", and after class you go out to learn what you are supposed to know. By, for example, heaven forbid, reading a book. Or two.
In the end doing the second thing works out better for you. Uni is not school. But hey, it is your time and your life. Fine with me if you want to waste it by insisting that professors shove it up your behind.