Environmental Science Class tips?

<p>So i have this class,,grade is based on 4 test. and its basically on lecture and not much backup info you can learn for the book. So I need to get an A or B plus on all four test to get an A class. Anyone have any tips? Should i taperecord him or something since i only get the material once and cant clarify through the book. And if i miss a class or be late im practically screwed.</p>