This teaching aid book was written with the aim of providing the best and easiest understanding of the basic principles of microeconomics and macroeconomics.

Its structure includes in each chapter:

• Main Points of the chapter: based on which the reader will understand the meaning and the "core" of each chapter.
• Typology: to refer to for the resolution of any question.
• Exercise methodology with four levels of difficulty: It should be emphasized that the difficulty level is adapted to the general difficulty level of each chapter. It should also be mentioned that an effort was made for the reader to understand not only the "steps" for solving each exercise, but also the exercise itself through special observations - notes.
• Recommended exercises for solution: These will be the main learning tool for what has been read. Their solutions are presented at the end of the book, so that there is the possibility of cross-checking right or wrong answers.
• Finally, questions: development, short answer of right or wrong, and multiple choice.

This teaching aid book can be used with the same ease by both students and teachers and can be a useful tool for anyone interested.