| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Echo 2 Resource and Assessment File | 978-0-435-39448-6 | 2009 | Mr Michael Wardle |
| Echo 3 Green Resource and Assessment File | 978-0-435-39481-3 | 2009 | " |
| Echo 3 Rot Resource and Assessment File | 978-0-435-39468-4 | 2009 | " |
| Echo Express 2 Resource and Assessment File | 978-0-435-39428-8 | 2009 | " |