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James Metz

Help students develop a mental picture of the size of an acre by comparing it with a football field.

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James Metz

This real-life activity explores how students can compute the age of a cat compared with the age of a human.

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James Metz

A real-world problem discusses producing various sizes of picture frames.

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James Metz

A real-world problem explores how much concrete is needed for a city park.

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James Metz

Students analyze how many trees are used to produce toilet tissue.

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James Metz

Students analyze football plays.

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James Metz

In the 1928 movie Steamboat Bill, Jr., as Buster Keaton stands in front of a house, the front wall of the house falls toward him. Keaton is unharmed as the open attic window passes over him. See photographs 1 and 2 for two views of the scene.

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James Metz

Shadows are a springboard for mathematical inquiry.

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James Metz

Photographs are a springboard for mathematical inquiry.

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James Metz

A t a party that I attended, the hosts gave their guests the Tower of Hanoi puzzle with alternating dark and light discs and a challenge to move the 7 discs to a new post. (I disqualified myself because I knew how to solve the challenge.) However, the hosts' son and daughter-in-law misunderstood the directions and moved the dark discs to one side post and the light discs to the other side post. I immediately wondered, “How many moves did they take, assuming that they made the most efficient moves? How can their interpretation of the problem be generalized to n discs?”