During Investigations the youngest children at our school explored inclined planes using ramps. They rolled marbles down ramps and measured the distances each marble rolled. They varied the slope of the inclined plane, predicting which height would cause the marble to roll further and explaining why. First they used a height of 6 wooden blocks, then 4, then 2 and compared the distances rolled. They even graphed the results. At the end of all this hard work they were given time to experiment with a cardboard box which allowed for even steeper inclines and further distances rolled!