Can assessing student music learning in the classroom improve music teaching and learning?  The answer is a resounding "Yes!" according to 163 assessment scholars, researchers, music administrators, students, and practicing K-12 and higher education music educators from across the world.  Representing 27 states and 13 nations, these leaders in music assessment shared current thought, research, and practices at the April 2009 Music Assessment Conference in Gainesville, Florida.  The presenters who attended the symposium provided insight and practical information regarding assessment in state and national contexts; schools and school districts; music classrooms; and higher education and music teacher education.  The resulting 52 papers and poster abstracts compiled into this important book provide an insightful, well-documented examination of an area that is becoming increasingly important in music classrooms across the world.  Book, 552 p.