| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Opus 1 Progression in Music 11 - 14: Teacher's Resource File | 978-0-435-81211-9 | 2006 | Karen Brock · Chris Hiscock · Derek Hobbs · Steve Block |
| Opus Pupil Book 1 | 978-0-435-81208-9 | 2006 | Karen Brock · Chris Hiscock · Derek Hobbs |
| Opus: Student Book 2 | 978-0-435-81230-0 | 2007 | Marie Cherry · Martyn Large |
| Opus: Teacher File & CD-ROM 2: Progression in Music | 978-0-435-81233-1 | 2007 | Marie Cherry · Martyn Large |