At the end of the session,
record their accomplishments through video or photography or by having
the students draw pictures of their structures. Then have the students
deconstruct the materials so that they can be used again at the next session.
Challenge the students to do one of the following:
Choose or adjust the difficulty of the challenge based on the age and level of building skills of your students.
The question of rules and what is fair inevitably arises in these challenges. Questions such as, "Are the structures allowed to droop, and if so, how much?" and "How do you measure distance from the wall or tabletop?" almost always come up for these cantilevers. Setting these rules by class discussion enhances sensitivity to these problems. "Where is it fair to hang the weights?" is another question that often arises. The place where weights are hung is critical for cantilevers. When we hear students protest "it's not fair" when a group hangs their weight in close to the wall or table, we know that they have understood an important aspect of torque.
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