Curated OER
Trundle Wheel
Sixth graders explore the uses of a trundle wheel. In this units of measurement lesson, 6th graders use trundle wheels to measure distances.
PBS
Pbs Learning Media: Measuring Different Lanes on the Track
In this video segment from Cyberchase, Bianca competes in her first track meet, but doubts the fairness of starting further back in the inside track lane for a 200 meter race.