Students become workers and are given the choice of producing an origami cup or an origami box.
Students participate in two production rounds, one without training and one with training. Through training students observe how productivity increases and as a result how income increases. They also discover that their choice of job determines their income. Income for most people is determined by the market value of the productive resources they sell. What workers earn depends, primarily, on the market value of what they produce and how productive they are.