This document is a case study of Dr. D. Ray McClellans clarinet teaching. His distinctive pedagogy relies on a comprehensive approach towards clarinet playing. Different aspects of his teaching are explored, starting with a description of his background in music, followed by a presentation of his concepts about clarinet techniques, warm-ups, practice techniques, and musicianship. The data collected for this research came from interviews and observation of lessons. I also compare Dr. McClellans approach with other professors pedagogy and concepts of clarinet playing. The warm-ups are a fundamental part of Dr. McClellans approach, and the document includes a compendium with most of Dr. McClellans warm-up exercises. My goal was to create a document that is a source of valuable information about clarinet techniques and clarinet teaching.