The series of educational books Competencia gramatical en Uso by Edelsa consists of 4 volumes corresponding to levels A1, A2, B1, B2. It is written according to the Common European Framework of Reference for Languages in Spanish developed by the Instituto Cervantes. It is designed for use in the classroom or individually by students who wish to use it as an additional aid.

The answer key book allows students to self-assess and at the end of the book they are provided with the option to mark the correct answers.

The series includes a student book, answer key, and CD.