The aim of this book is for students to acquire basic knowledge of Economics that will help them as future citizens to manage problems and situations of everyday life. Its content covers the entire curriculum of the school book, however, each chapter contains several additional elements that function as supplementary in the process of understanding: Basic theoretical concepts, solved exercises, the difficulty of which increases progressively, true-false, multiple-choice and matching questions, exercises for solution, topics of previous years' nationwide exams and evaluation criteria. Throughout the writing of this particular book, a decisive factor was the codification of knowledge and its separation from simple information, with the aim of making teaching easier for the teacher and understanding easier and more essential for the student.