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Tokyo Campus
October 6, 2017

Estimating a building’s height: Mathematics for sixth-year students


In a mathematics class, sixth-year students studied "Magnification and reduction."
As a summarized study of the subject, the students each paired off with a classmate to make an "original measuring instrument" using a protractor, a straw, a string, and a 5-yen coin, and measured the actual heights of the buildings on campus and of the athletic equipment.

The students really enjoy such mathematical activities, and they rushed to the Hogaraka Garden and the school grounds with the measuring instruments (that they each made in pairs with another classmate) in their hands. After measuring, they went back to their classroom and drew the reduced figures of what they measured in their notebooks. Cooperating with classmates, they expressed the actual heights of the buildings as a ratio.