On Core Mathematics Grade 6: Teacher's Guide (Houghton Mifflin Harcourt on Core Mathematics)
| Country | USA |
| Brand | Mothca |
| Manufacturer | Mothca |
| Binding | Electronics |
| ItemPartNumber | XR-2P |
| Model | iPhone XR/11 |
| Color | 2 Pack |
| Size | 6.1 inch- iphone XR |
| UnitCount | 2 |
| ReleaseDate | 0000-00-00 |