Children must have a multitude of sensorial experiences with size, dimension and form before they are introduced to mathematical quantities and their symbols. Before formal lessons, the children need casual practice with rote counting. Once they are certain of quantity and symbol of numbers 0 through 10, an overview of the base 10 system with numbers 0-9999 is begun. Next in the sequence comes counting the squares and cubes of sets of numbers from 1 through 10. Simultaneously, children are taught simple one-digit, concrete, static addition and subtraction. Once the children can skip-count from memory, multiplication is introduced and is followed by division with no remainders. Fact memorization follows with use of fingerboards.