| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Hey Mathematics: Camel Module 1, Bk. 4 | 978-0-304-31663-2 | 1988 | etc. |
| Hey Mathematics: Duck Module 2, Bk. 1 | 978-0-304-31604-5 | 1988 | " |
| Hey Mathematics: Elephant Module 1, Bk. 2 | 978-0-304-31664-9 | 1988 | " |
| Hey Mathematics: Giraffe Module 1, Bk. 3 | 978-0-304-31626-7 | 1986 | " |
| Hey Mathematics: Monkey Module 1, Bk. 1 | 978-0-304-31825-4 | 1986 | " |
| Hey Mathematics: Moon Module 1, Bk. 6 | 978-0-304-31512-3 | 1988 | " |
| Hey Mathematics: Moon Module 1, Bk.6 | 978-0-304-31660-1 | 1986 | " |
| Hey Mathematics: Owl Module 2, Bk.4 | 978-0-304-31662-5 | 1980 | " |
| Hey Mathematics: Pigeon Module 2, Bk. 2 | 978-0-304-31603-8 | 1986 | " |
| Hey Mathematics: Swallow Module 2, Bk.3 | 978-0-304-31661-8 | 1986 | " |