It can be argued that Swanwick's research and scholarship established the field of music education as an area of interdisciplinary study in the United Kingdom. A significant and seminal publication in this legacy is Swanwick's work with Tillman on the sequence of musical development based on Tillman's empirical study of children's compositions. This paper will aim to place the resulting 'spiral' in the wider context of Swanwick's meta-theory of music education and to understand some of the critical issues surrounding it. The paper will conclude with an appraisal of Swanwick's impact on the theory and practice of music education.