Memorize the key ideas of each unit and focus on filling in the provided documents and use those to study for tests. Extra notes can be created to help you during tests and to put all the information on a topic in one place to make studying easier. Participate in class and your learning will be enhanced.

As long as you put in effort, you'll succeed! I took world issues and submitted homework/assignments on time, studied for tests (not THAT much though, probably just the night before). Most of the stuff is applying your knowledge.