In this session we will review an example of a PYP Unit of Inquiry which is intrinsically collaborative between the Homeroom and Specialist classrooms: Film Music. We will reflect upon what makes a strong and authentic transdisciplinary unit, in which students are able to identify connecting themes and transfer key concepts from one subject to another. Attendees will learn about the scaffolding, planning, and execution involved through the lens of this particular third grade Music unit at Berlin Metropolitan School, considering how to make the most of a music teacher's time and resources and promote the elements of the PYP. Related concepts addressed in the unit include music theory, history, expression, culture, and communication. We will discuss related mini-projects and possible extensions, differentiation strategies, technology integration, and assessment and performance opportunities. While this session is geared toward primary teachers, all are welcome as the ideas and concepts can be adapted to fit the needs of your students and school.