I’m teaching Theory I, Theory III, and Form and Analysis this semester. Since the Theory III kids already have their old textbooks, I am not changing their texts. Textbooks are expensive enough as it is.
So, here are the books I’m using for Theory I and for F&A.
Theory I:
The Musician’s Guide to Theory and Analysis – Jane Piper Clendinning and Elizabeth West Marvin
The Musician’s Guide to Aural Skills (both volumes) – Clendinning, Marvin, Joel Phillips and Paul Murphy
MacGamut – Ann Blombach
Music for Sight Singing – Robert W. Ottman and Nancy Rogers
There will be several articles as well.
Form and Analysis:
Hearing Form (with anthology/workbook) – Matthew Santa
Scores – Beethoven, Symphony no. 9, op. 125 and Schubert, Quintet in A major, D. 667, “Trout”
There will be several articles as well.
The goal is to have the students *writing* about music as early and often as possible, including the Theory I kids.
Thoughts?
WF
Wes Flinn Music 
Sounds like you’ve cloned TTU’s sequence–I approve (and I’m sure Matt would too!)
The Santa book was one of the exam copies that I gave away when I left OPSU… it seemed too simplistic, a repetition of the same material covered in the form chapters in C-M. But then, I focus on analysis rather than form whenever I can.