The book "Bachillerato / 99 Grammatical Exercises" offers a comprehensive collection of grammar exercises specifically designed for the review and reinforcement of important grammatical topics. It is aligned with the teaching material "Bachillerato" but can also be used independently, making it a flexible learning tool. The exercises are varied and include solutions to facilitate learning. Key grammatical topics such as the subjunctive, past tenses, the use of "por" and "para," as well as the distinction between "ser" and "estar," are intensively practiced. Additionally, the exercises prepare students for projects and incorporate various types of exercises that support achieving the B2/C1 level of the Common European Framework of Reference.