Playful Jacks Math Flash Cards is a fun way for kids to learn their math facts. Interactive addition flashcards, subtraction flashcards, multiplication flashcards, and division flashcards for kids. Practice arithmetic facts on your iPhone, iPod and iPad and have fun! If your device is shared, each child can customize scores with their name. Number values in the flash cards can be customized so students can practice on numbers that they are having difficulty doing, and soon will have them mastered.