The books in this series aim to help elementary school students practice spelling, alphabetical order, and dictionary use. The young students copy in them many times and learn the spelling and basic vocabulary of each school subject, as well as supplementary words and sentences composed of selected, familiar letters to the child.

The Index is particularly useful, as children practice the correct writing and alphabetical ordering of new words they learn or those that present spelling difficulties.

It is a small dictionary that the student is called to create themselves, and this is of particular importance to them because it gives them the joy of creation and self-activity.