Give students a fast, hands-on motion investigation: set up a simple marble ramp, change only the ramp height, and measure how height affects average speed. With clear test rules and simple materials, students plan a fair test, collect multiple times for each height, calculate average speed, and create a comparison graph of Average Speed vs Ramp Height. The teacher guide explains why higher ramps provide more stored energy (gravitational potential) that turns into motion (kinetic), so you ca