As an introduction to scoring using the student-created rubric, the teacher will score a previous year's machine with student input. Project the rubric onto the board and, with student input, score the machine in each category.
Once groups have built their own Rube Goldberg machines, groups will score another group's machine using the previously created rubric.
What are qualities of a "good" Rube-Goldberg machine?
In what ways could the machine you are scoring be improved?