Montessori's fifth great lesson is known as The Story of Mathematics, The Story of Numbers and/or The Story of Numerals. The story begins with the Stone Age system of body-counting and continues on to the decimal number system we use today all over the world and includes the contributions of Africa, Asia, Europe, and North America to our currently used decimal number system. The Story of Mathematics can be told repeatedly to children from the age of six all the way through to age 12. Every re-te