Children need to have their number facts ready at their fingertips. (without using their fingers!). How can you be sure you get the right change at a store or if data was entered properly in a computer if you are unsure of your number facts? The materials in this category are a great help in the area of drill. We personally also found counting and adding groceries, and playing cribbage to be helpful in math facts repetition. There are also several card games that increase number fluency.