"Aprende Gramatica y vocabulario" is a supplementary material, suitable both for classroom use and for self-study. The book is divided into two parts: the first one covers grammatical points and the second one focuses on vocabulary. Aprende 4 contains 26 grammar lessons and 10 vocabulary lessons. Every grammar unit is organized into three sections: Situaciones: a grammatical point is introduced. Como es?: presentation of grammatical models; and, Practica: a series of activities graded according to their difficulty. Students will develop their grammatical skills step by step. The second part of the book focuses on vocabulary. Each unit introduces and practises the most useful and basic vocabulary of each level, in an entertaining and fluent way. It also contains numerous illustrations, which help students to learn more easily and fast. The book includes at the back a regular and irregular verb list, and the answer key to the exercises.