Classroom music teachers in England design their own music curricula for Key Stage 3 (11 - 14 year olds, 6th - 8th Grades). These curricula are designed in a context where policymakers define, regulate and legitimate curriculum formulations. This study traced curriculum development in England, where government has validated a policy driven approach. It explored "programs of study," which music teachers in England design as summaries of musical learning for Key Stage 3. The research consisted of documentary analysis in a two-phase study of 13 secondary (high) schools in the English midlands, exploring musical knowledge for musical learning, which is analyzed utilizing qualitative and quantitative methodologies. The paper concludes with a discussion which explores the impacts of music education policy on classroom practices, and presents a proposed model which captures this interaction.