Music Advocacy Facts
Fourth graders who received two years of piano lessons scored higher on a spatial test than children who did not receive lessons.
From: "The Effects of Three Years of Piano Instruction on Children's Cognitive Development," Journal of Research in Music Education, 1999, 47 (3): 198-212
Available here: The Arts Education Partnership - Critical Links: Learning in the Arts and Student Academic and Social Development
Research it further. (Will open in new window.)