Hello, I am wondering, from a pedagogical point of view, would professors give as little information to the student's. What I mean is, what is the point of deriving a bunch of equations during lecture, and then giving problems not related to a derivation of an equation on the test. I mean, you should test on what you lecture, no? I feel like the professors are intentionally trying to weed out people. They know what they are going to give you on the test, so why not do things related to that in lecture?