The series is meticulously organized into , ranging from Preparatory to Level 10 . Each level is designed to provide a comprehensive, balanced curriculum by dividing the music into three distinct volumes:
: Features foundational works by masters like J.S. Bach , Haydn, Mozart, and Beethoven .
: Includes expressive pieces from the 19th and 20th centuries, covering composers like Gurlitt, Schumann, and Bartók.