Informal Learning in Music Education: Exploring Theory in Practice examines how informal learning pedagogy is understood, implemented and experienced in music education. It highlights some of the benefits and challenges facing the approach in practice, over twenty years after Green's (2002) seminal publication that established the theory based upon How Popular Musicians Learn . The book draws on four in-depth case studies of secondary schools implementing the approach in England, in addition to interview data from three key figures who have played a key role in establishing, disseminating and promoting the approach. Informal learning is of international interest and values aspects such as increased student choice and autonomy, aiming to increase student motivation and widen participation and inclusion. This book is organised into key themes that have been generated to frame contemporary thinking about the informal learning approach, making a distinctive contribution to knowledge in this discipline area. This book draws attention to some of the barriers and enablers of informal learning in practice, offering implications for practice and policy to ensure the future sustainability of the approach.