The new 4th edition reflects the change in content emphasis on the AP ECONOMICS EXAMINATION and consists of three parts: the first part is new to the 4th edition and is a content summary of each unit. This content review provides students with a clear and concise summary of the important economic concepts contained in that section of the AP ECONOMICS EXAMINATION. The second part of the book prepares students for the multiple-choice and free response questions on the AP MICROECONOMICS EXAMINATION. It consists of 5 units totaling 130 multiple-choice questions and 15 free-response questions, as well as 2 sample exams, each with 60 multiple-choice and 3 free-response questions. The 5 units in the Microeconomics section of the book are: Scarcity and Opportunity Cost; The Price Discovery Mechanism, Supply and Demand; Cost of Production and Theory of the Firm; Factor Markets; and Public Finance. The third part of the book prepares students for the multiple-choice and free response questions on the AP MACROECONOMICS EXAMINATION. It consists of 5 units totaling 143 multiple-choice questions and 15 free-response questions, as well as 2 sample exams, each with 60 multiple-choice and 3 free-response questions. The 5 units in the Macroeconomics section of the book are: Macroeconomic Indicators; Business Cycles and Fiscal Policy, Money; Banking and Monetary Policy; Aggregate Supply/Aggregate Demand Model, and International Economics. Each class order is accompanied by a FREE Teacher's Manual, which contains explanations for all the multiple-choice and free-response questions. Also included in the Teacher's Manual are actual student answers to the free-response sample exam questions that are graded using a standard AP rubric. The rubric and an explanation for the grade given are included. A course description is included as well. Student Answer Keys for all multiple-choice questions are separately packaged.