In math, sixth graders have been studying the concept of similarity, when two figures are of the same shape, but have different sizes. They began by getting several 1-inch squares with a bit of a picture on them, and they had to draw them on a 6-inch square. After the class finished, they looked at the enlargement, measured several parts, and determined that everything on their enlargement was 6 times larger than the original. They then began exploring what operations they could use to maintain similarity. They tried drawing triangles that changed by adding and by multiplying. They determined that using addition did not retain the original shape of the triangle, but multiplication and division did. Their work continued into using ratios, first of corresponding sides but then into other and more challenging situations.
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