The book is written following the paragraphs of school books and includes:

- The theory that every child should know, which is explained with the help of examples and diagrams.
- Many exercises for practice, several of which are accompanied by a solved example.
- Evaluation criteria per unit and criteria for each teaching period.
- The solutions to the exercises in the book.
- Appendix with all the necessary auxiliary elements (multiplication tables, divisions, solid developments, tangrams, banknotes and coins).