L -H · Leslie Haggin · Leslie Haskin · Leslie Howsam
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Algebra - Mathtraks: Creative Tasks, Activities & Games for Ages 11-14 | 978-1-907550-13-3 (1-907550-13-5) | 2014 |
| Number - Mathtraks: Creative Tasks, Activities & Games | 978-1-907550-11-9 (1-907550-11-9) | 2014 |