Here is a book of grammar for efficient power train in personal work and self-evaluate. The explanations are clear, and timed exercises are used to verify the acquisition of the current page, with this idea of small personal challenge with the points counting for each fiscal year (we will not change ..). What I like: the grammar Association (first part) and vocabulary (Part II) to enrich his English evenly. This little book is the ideal tool for high school students, mainly for different preparations to IBC, both orally and in writing, and will also be a welcome addition in the course.