| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Mathscheck: Level 8 | 978-0-00-312590-0 (0-00-312590-4) | 1994 | Paul Harling |
| Mathscheck: Level 9 | 978-0-00-312591-7 (0-00-312591-2) | 1993 | " |
| Mathscheck: Level 10 | 978-0-00-312592-4 (0-00-312592-0) | 1993 | " |