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. Tell this story with confidence - this resource has everything you need and offers differentiated levels of support. Save