| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Mathematics Unlimited / Classroom Activity Book / Grade 4 | 978-0-03-008838-4 | 1987 | Francis "Skip" Fennell · Robert Reys · Arnold Webb |
| Mathematics Unlimited Grade 5 - Classroom Activity Book - Blackline Masters | 978-0-03-008842-1 | 1987 | Francis "Skip" Fennell · Robert Reys · Arnold Webb |
| Mental Math in the Middle Grades | 978-0-86651-312-8 | 1987 | Jack A. Hope · Robert Reys |
| Mental Math in the Primary Grades | 978-0-86651-434-7 | 1988 | Jack Hope · Larry Leutizinger · Robert Reys |
| Number Sense: Simple Effective Number Sense Experiences Grade 1-2 | 978-1-57232-261-5 | 1996 | Robert Reys |
Barbara J. Reys · Barbara R. · Barbara Rakow · Barbara Ras · Barbara Rees · Barbara Reich · Barbara Reik · Barbara Reioux · Barbara Resch · Barbara Reske · Barbara Rex · Bárbara Reyes · Barbara Rice · Barbara Rico · Barbara Rök · Barbara Rösch · Barbara Rose · Barbara Ross · Barbara Rossa · Barbara Rossi · Barbara Rück · Barbara Rusch · Barbara Rush