The Breathing Book, by David Vining, is available in editions for Trumpet, Tenor Trombone, Bass Trombone, Euphonium (BC and TC), and Tuba. It can be used as a group tutorial in studio classes, as a method book to have students practice individual chapters, as a resource to learn facts about the breathing mechanism or like this:
A student is having trouble playing with a full and resonant tone quality without tension – say on a loud excerpt like Tannhauser. Open The Breathing Book to Chapter 6 – The Truth About the Diaphragm and have the student try the first phrase out of the book. Directly after doing this, try about 8 bars of Tannhauser; then take a little rest. Next, do the second phrase out of the book followed by the next 8 bars of Tannhauser. Continue working your way through the book and excerpt in this way until the student is playing the excerpt with the same freedom as the book.