Well, the article is really about why we need "arts" in the schools, but we all know that Music is King of the Arts.
Here is one of the six reasons:
First, he estimated that something like 95% of children are capable of doing the work necessary to obtain a high school diploma, yet the dropout rate hovers around 25%. Too many of these students quit because they decide (usually in about the fourth grade) that school is not the place for them. This decision is based largely on their perception of their performance in reading and mathematics. The arts, Kagan argues, offers such students another chance to feel successful, and to feel that they belong at school.