| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Addition Unplugged | 978-1-895523-65-2 | 1997 | Sara Jordan ยท Mark Shannon |
| Addition Unplugged | 978-1-895523-67-6 | 1997 | |
| Division unplugged | 978-1-895523-47-8 | 2001 | |
| Division Unplugged | 978-1-895523-77-5 | 1998 | Sara Jordan |
| Division Unplugged | 978-1-895523-79-9 | 1998 | |