This activity has been revised and was originally created by Mary Jane Clark and published in the Perkins Activity and Resource Guide (1st edition, 1992). The second edition is available for purchase.
In order for students to truly understand quantitative concepts, such as the value of money and measurement, they must first understand the concept of more and less. Students must be able to apply this concept to a functional setting before learning addition and subtraction. This activity teaches comparative quantities using concrete objects that have meaning to the students. Lessons include Concept Development and Math.