@UpMagic you are right, no point in taking classes you already have credit for. At Berkley or any other university, the testing methods are very different. I think the difference between high school level tests and university level tests is that in high school you are focusing on the concepts. If you have understood the basic concept well and know how to use the equations you will be fine. At college level it in more in-depth application of the concept and equations to solve problems that are worded differently or asked to use a alternate method to arrive at a solution. It takes a lot of practice problems to understand various interpretation of the same concept. If you put in enough time to solve all the problems in a textbook and some more from other resources you will be able to get a good grade.