The book is excellent and perfectly meets the learning needs of fourth grade students. The authors managed to cover the entire content of the textbook with a variety of exercises of varying difficulty. Additionally, the edition, through its four-color printing and accurate illustrations, makes the book appealing to students.

This supplement definitely helps a student to practice more. However, it does not explain the theory and does not have a wide variety of exercises. Instead, I would recommend the series "Katakto tin Koryfi" which includes everything that I did not find here.