Unit two: Differentiation: Definition and Fundamental Properties – explore how limits change over small intervals and understand how derivatives are a tool to measure the rate of change from one variable to another (10-12%).Unit one: Limits and Continuity – examine various graphs of functions and forms of the conceptual basis of calculus: limits (10-12%).Your teacher may choose to group them together differently or teach them in a different order, but you should be able to familiarize yourself with these topics: There are eight units covered on the AP calculus AB exam and in your AP calculus class. There are actually two AP calculus exams, so before you go any further, make sure you are going to be taking the AP calc AB exam not the BC exam. Keep reading to learn how to gain at least a three. Passing with a three or better allows you to skip that college credit. Just like any AP course you may take, you have the chance to take an exam at the end of the course to earn a college credit for your hard work, an AP calculus class is the same.