This CD is really helpful for this Logic class. I have a hard time remembering things. The CD presents a summary of each concept given in the book--in print, and then adds audio to it. After the initial premise is presented there are drills with questions and different situations that the narrator goes over. Lots of drills. Lots of practice. But, the cool feature of this is if you choose the wrong answer they give you a solid explanation of why it is the wrong answer. By the time you get to the right answer, you'll have a much clearer understanding of the idea. The narrators are professionals as well, so there is nothing irritating or jarring in their speech that would cause you to turn the sound off. It has helped me a great deal.