| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Math Rules!: 1st-2nd grade 25 week enrichment challenge *Now Includes PDF of Book* | 978-1-880505-79-3 (1-880505-79-7) | 2001 |
| Math rules!: 3rd-4th grade 25 week enrichment challenge *Now includes PDF of Book* | 978-1-880505-80-9 (1-880505-80-0) | 2000 |
| Math rules!: 5th-6th grade 25 week enrichment challenge *Now includes PDF of Book* | 978-1-880505-81-6 (1-880505-81-9) | 2002 |