Using Our Marbles to Create Roller Coasters

The students were challenged to build roller coasters out of paper strips with a rise part way along the course. The goal was to have a marble travel the full course.  I was impressed with the problem solving (creating sides to the track, raising the height of the sides in key places, adding a roof in key places and even a hole for the marble to drop to a new level).  The students worked  cooperatively and were pleased with their results even though the marbles did not always cooperate.