Ask students to make predictions based on the group data, i.e. which racer will be the fastest. Compare the predictions with the actual results. Discuss ways to improve the speed of the racers. If time allows, test those improvements, calculate the speed, and record. Through this exercise, students are able to follow directions to construct both the racers and the raceway.
Students use measurement skills to conduct the raceway.
Timers allow students to approximate the time. Calculating the speed over several trials provides adequate practice of measuring distance, time and calculating speed. The students record data using a chart and line graph. Predictions were made based on the data presented by the group. It does take time for the students to construct racers that are durable and effective.