"What shape does this block look like from the side?" "It looks like a different shape from above than it did before!" When playing with blocks, children sometimes notice that the shape changes depending on the viewing angle. In elementary...

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"The left and right sides are the same shape, aren't they?" "It's like looking in a mirror!" Have you ever made such a discovery? In elementary school, students learn about "line symmetry" and "point symmetry," but the foundational understanding for...

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Many people probably think of fractions as something you learn when you start elementary school. Indeed, in elementary school, children learn how to write and calculate fractions like "1/2," "1/3," and "3/4." But before that, what's important is "What is...

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When you hear the word "volume," many people probably picture a somewhat difficult concept taught in the upper grades of elementary school. However, elementary schools don't actually jump straight to teaching the word "volume." Instead, they first use the word...

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