High school instrumentalists studying the trombone, euphonium (baritone horn) cello, double bass, and bassoon will encounter the tenor clef in advanced works. The tenor clef is a moveable C clef used to represent music written in the upper ranges for those instruments. Its symbol is identical to the alto clef, also a moveable C clef. Middle C is located on the 4th staff line in tenor clef, the 3rd (or middle staff line) in alto clef. In particular, trombonists will encounter parts in orchestral music using alto, tenor, and bass clefs (F clef). This book is designed to used collaboratively between a student with great interest in learning and private teacher. The 26 progressive studies, each containing several original compositional etudes, short exercises, and written assignments, should provide adequate resource material for six months of continuous instruction and learning. A dedicated student who successfully completes these etudes and exercises should be ready for advanced instructional and performance literature at the collegiate level. The material in this book is original, tonal, and geared toward the high school student. The content provides a unique approach for student and teacher, working closely together, to learn to read tenor clef in major and minor keys while further developing range and technique.