This STEM activity is fantastic for all ages. It is engaging and meaningful. In my classroom, I grouped students heterogeneously. Then I gave them the challenge to construct the longest paper chain out of just ONE piece of construction paper. After an initial time period for sketching ideas, each group constructed their paper chain. Upon completion, we measured the chains in inches two at a time, eliminating the shorter chain, until we were left with the "winner". After each measurement, w