| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Number SENSE: Simple Effective Number Sense Experiences, Grades 1-2 | 978-1-57232-261-5 (1-57232-261-6) | 1997 | Barbara Reys · Robert Reys |
| Number SENSE: Simple Effective Number Sense Experiences, Grades 4-6 | 978-1-57232-263-9 (1-57232-263-2) | 1997 | Barbara Reys · Robert Reys · Jack Hope |
| Number SENSE: Simple Effective Number Sense Experiences, Grades 6-8 | 978-1-57232-264-6 (1-57232-264-0) | 1997 | Barbara Reys · Robert Reys |