The formation of the ear is rarely discussed as such in the course of an instrument. Yet, it is the key to enabling students to progress independently, making them able to hear what they need to improve themselves. This original method, intended for cello teachers, consists of many new games designed specifically to work the ear in five minutes at the beginning of each course. It addresses all the dimensions of ear training through musical games without score, usable from the very first course to the highest levels. An innovative method, ideal for all teachers looking for educational creativity.