Number fluency at an early age refers to a full understanding of the principles of counting. Knowing everthing that a number represents. For instance, let's take six. It means know that 6 means 6 of something that's it's less than any number greater than 6 and more than every number less than 6. It means knowing that in a line up or on a number, there is a 6th place. It's knowing that it can refer to 6 concrete items (buttons, cars, coins etc.) or 6 abstract items (6 breaths, 6 thoughts, 6 ideas etc.) It's knowing where 6 is placed on a number line. Research has indicated that children who lack number fluency in the first grade tended to lag by the 7th grade, were behind their peers and lacked the basic math skills required to function as an adult. More on this story.