Data based on 2 reviews.
Go over the slides and focus on the material that is given. It will not be challenging classes as long as you understand the material. There are usually weekly questions, and can be easy grades as long as you continue to do them and pay attention in class. Even if you don't if you reread the lecture slides it'll be fine.
Reading the coursepack is essential for achieving a good grade in the exams and quizzes.