With this aid, the teachable-examinable material of the course "Principles of Economic Theory" for the 3rd grade of General High School is completed. The purpose of the book is to help students understand all aspects of the examinable material, so that they can successfully cope with the exams.

This issue presents and analyzes basic concepts of macroeconomics, corresponding to the chapters of the school book: "7th: Gross Domestic Product", "9th: Economic Fluctuations-Inflation-Unemployment", "10th: Public Finance", to provide the student with a comprehensive and complete approach to economics.

The structure of the material, the presentation of the content, the methodology, and the exercises lead to the deepening and renewal of economic knowledge.