The GBEE includes a 10-page diagnostic test at the beginning. Do not skip this! It will tell you exactly which units to study. Many students waste weeks reviewing verb tenses they already know.

It focuses on real-life usage and meaning rather than just abstract theory.

: Includes a section with an answer key (clave de respuestas) for its exercises. Editorial Difusión or a list of from the GBE to practice a particular grammar topic? Los mejores libros de gramática española - Talkpal AI

If you're interested in alternative resources, here are some other options:

The GBEE’s layout makes this easy because each unit is self-contained.