Music education is a field of study associated with the teaching and learning of music. It touches on all learning domains, including the psychomotor domain (the development of skills), the cognitive domain (the acquisition of knowledge), and, in particular and significant ways, the affective domain (the learner's willingness to receive, internalize, and share what is learned), including music appreciation and sensitivity. Music training from preschool through post-secondary education is common in most nations because involvement with music is considered a fundamental component of human culture and behavior. Music, like language, is an accomplishment that distinguishes humans as a species.During the 20th century, many distinctive approaches were developed or further refined for the teaching of music, some of which have had widespread impact. The Dalcroze method (eurhythmics) was developed in the early 20th century by Swiss musician and educator Émile Jaques-Dalcroze. The Kodály Method emphasizes the benefits of physical instruction and response to music. The Orff Schulwerk ""approach"" to music education leads students to develop their music abilities in a way that parallels the development of western music. The Suzuki method creates the same environment for learning music that a person has for learning their native language. Gordon Music Learning Theory provides the music teacher with a method for teaching musicianship through audiation, Gordon's term for hearing music in the mind with understanding. Conversational Solfège immerses students in the musical literature of their own culture, in this case American. The Carabo-Cone Method involves using props, costumes, and toys for children to learn basic musical concepts of staff, note duration, and the piano keyboard. The concrete environment of the specially planned classroom allows the child to learn the fundamentals of music by exploring through touch. Popular music pedagogy is the systematic teaching and learning of rock music and other forms of popular music both inside and outside formal classroom settings. The MMCP (Manhattanville Music Curriculum Project) aims to shape attitudes, helping students see music not as static content to be mastered, but as personal, current, and evolving. American fiddler Mark O'Connor developed a method of violin education that is designed to guide students in developing musical techniques necessary to become a proficient violinist. During its tenure, the Mumbai-based Boss School of Music developed a proprietary method of education using audio-visual technology, simplified concepts, and specially designed musical equipment.