| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Challenges: An activity book to accompany Earth science | 978-0-07-068311-2 (0-07-068311-5) | 1979 |
| Challenges: An activity book to accompany Physical science | 978-0-07-068312-9 (0-07-068312-3) | 1979 |
| Work/study guide to accompany Life science | 978-0-07-068310-5 (0-07-068310-7) | 1978 |