Everything in the material world has shape. A deeper knowledge about how two- and three-dimensional shapes are defined and relate to one another will help educators be aware of subtle distinctions and rules. Such an understanding allows educators to notice and highlight children’s key discoveries and to guide their experiences to make this knowledge explicit for them.
© Erikson Institute’s Early Math Collaborative. Reprinted from Big Ideas of Early Mathematics: What Teachers of Young Children Need to Know (2014), Pearson Education.
● Shapes can be combined and separated (composed and decomposed) to make new shapes.
● The flat faces of solid (three-dimensional) shapes are two-dimensional shapes.
● Shapes can be defined and classified according to their attributes.
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