My daughter was frustrated with not being able to find simple flash cards with remainders. She wanted to practice one factor at a time and master that particular one before moving on to the next one. She took the time to make four flash cards per page from 144/12, 143/12, 142/12 all the way down to 13/12. Run the pages back to back so the answers are on the back. Suggestion: use tag and/or laminate. She played many different games with these cards and I'm pleased to say that she mastered the Division 12 facts in record time!!! There are 66 pages in the entire set. See her (our) store for the entire download and for other factors. Purchase, practice, and perfect!