This is the classic clarinet method that generations of clarinetists have used to learn their craft. Since then, nearly a million copies have been distributed worldwide and it has been introduced in many conservatories, music schools, and private lessons (from around 1930 in an improved and expanded edition by Leonard Koh, clarinetist at the Berlin Opera).

This school is aimed at students who want to learn everything related to success on the clarinet in a consistent and systematic way, including a basic theory of music and knowledge of the instrument. Two fingering charts are included (for the Boehm system and the German system).