This book is a comprehensive aid for students of the 2nd grade of Gymnasium, to meet the requirements of the school. This aid does not replace the school book, but helps in its study and contributes to the understanding of the concepts it includes.

The structure of the units and lessons of this aid follows the corresponding structure of the school book.

Each lesson begins with keywords, which are highlighted in the main points of the lesson or explained. Then, the basic concepts and main points of the lesson are analyzed in such a way as to facilitate the student's understanding and learning of them. Additionally, on the pages where the theory of the lesson is contained, the points that either require special attention or clarify some concepts or arise from the basic concepts of the lesson are presented in a frame. Some lessons are also accompanied by interesting encyclopedic knowledge, under the title "bright know-it-all", which enrich the student's knowledge and broaden their horizons.

Following are the Answers to the questions - exercises of the school book and the Workbook, while Supplementary questions - exercises (true-false, multiple choice, matching, acrostics, etc.) are also proposed, with the aim of practicing and checking the knowledge acquired from the study of the lesson. At the end of each unit, an Evaluation Criterion is presented, which contributes to the verification of the understanding of the concepts taught in the lessons.

At the end of the book, the answers to the supplementary questions - exercises and the Evaluation Criteria are also included.