If we look at music in different parts of the world, we find even more variations and ideas about what music is. “Music” is one of the most difficult terms to define, partially because beliefs about music have changed dramatically over time just in Western culture alone. The second half gives a brief overview of music education and teaching in the U.S., which provides the foundation of the discipline for the book. Chapter Summary: The first half of this chapter attempts to define music as a subject and offers perspectives on music, including basic vocabulary and what you should know about music in order to incorporate it in your work with children.