Opportunity Cost and the Mystery of the Left Socks Lost By Mark J Flowers
The Supply and Demand & The Lemonade Stand series is directed toward economic education for primary school children. With so few resources existing to meet Common Core needs, this series is excellent at introducing key economic concepts at a level children can understand and relate with. This is recommended for both parents and teachers alike, for all grades from 1st through 5th, and includes less common book topics such as opportunity cost and competition.
