A bouncing ball serves as more than entertainment when learning to apply quadratic functions to real-world events. This is the second of a two-part lesson, which can also be accessed from the website. The instructions say to measure the relative height of the bouncing ball with a Calculator Based Ranger (CBR); however, an approximation with a yardstick would work as well. After determining the quadratic function, partners graph parabolas and identify the values of the equation.