<p>Both 5 Steps and Crash Course define the concepts. However, Crash Course goes one step beyond 5 Steps by including particularly vivid examples for each concept. This is not a minor point. Two-thirds of the AP Psychology multiple-choice questions and most of the free-response questions are centered on concepts. The test writers expect students to identify examples on the multiple-choice questions and provide examples on the free-response questions. So recognizing and providing examples of key concepts is of paramount importance. Crash Course excels in this area and that is why I recommend it.</p>