This book is to be used with or to follow any method. It contains a good variety of different etudes to challenge and further studies in regards to technique and musicality. The etudes are written in many different meters, keys, keys with key changes, and styles. Etudes at the beginning of the book are geared more towards the elementary level player, but get more challenging as the book progresses.
Here, you’ll find a set of video examples for each one of these studies. “Rubank Supplementary Studies for Trombone” by R. M. Endresen is still in print through Hal Leonard Publishing and can be ordered from your local music store.
Rubank Supplementary Studies for Trombone – Instructional Video Catalog