Great, engaging, hands on lab that help solidify the concept speed.
Students will collect data as they run hot wheels along a pre-measured distance and record the time it takes the vehicles to travel. The collected data is used to calculate speed and is compared to different hot wheels cars. There is a hypothesis to develop, four concept questions to answer per car (3 cars) that require pulling the material together then comparing data to additional data collected, and a summary/conclusion paragraph to write.
I use this over two 45 minute class periods.