This lesson should be presented in stages over a series of 2-4 weeks. I have made every effort to follow the Montessori principles and theories to make basic economic principles accessible to the Primary age group. This lesson could also be useful and easily modified to meet the needs of Lower Elementary.I begin with a complete lesson plan of a marketplace mathematics activity, which involves children learning basic methods of counting money. For example, if an apple has a $2 price tag, the chil