The method is aimed at both beginners and professionals, and is aimed at acquiring well-structured and organized training for levels of difficulty in order to provide adequate technical / theoretical skills. This collection of exercises is a first approach to jazz language; in fact, the text progressively addresses technically advanced topics, enriched by advice and useful lessons, without neglecting the part devoted to functional harmony, with the harmonization of the notes, the expression of the acronyms even in the horizontality of the arpeggios, the various chord types, the major and minor II-V-I progressions, the approach notes, the variations of a melody, the most used rhythm patterns, and finally a selection of traditional and jazz tracks.