Let this guide show you how children can add, subtract, multiply and divide up to the thousands place with just one material - the Decimal System Material (aka Golden Bead Material) - and just by knowing how to count from 1-9. How. Cool. Is. That?Sharing with you my personal teaching lesson guide/plan, originally written to obtain my certificate as a Montessori Elementary Guide, in the hopes that it would help you discover the joy of teaching...the joy of teaching THE MONTESSORI WAY!Pictures a