Throughout his adult life, Kodály was very interested in the problems of many types of music education, and he wrote a large amount of material on teaching methods as well as composing plenty of music intended for children's use. Beginning in 1935, along with his colleague Jenő Ádám (14 years his junior), he embarked on a long-term project to reform music teaching in Hungary's lower and middle schools. His work resulted in the publication of several highly influential books.

The Hungarian music education program that developed in the 1940s became the basis for what is called the "Kodály Method". While Kodály himself did not write down a comprehensive method, he did establish a set of principles to follow in music education, and these principles were widely taken up by pedagogues (above all in Hungary, but also in many other countries) after World War II. See also: Kodály Hand Signs.

In the motion picture Close Encounters of the Third Kind, a visual learning aid distributed to members of a conference of ufologists was named the "Kodály Method" and referenced musical notes as hand signals.