In Topic C, the concept of volume and the vocabulary used to describe and compare it (i.e., big, small, more, and less) are discussed. This is perhaps the most familiar to young children, compared to the previous topics of length and weight. The language used to describe volume ties directly into the language we use to compare numbers using more than or less than (with more than eventually giving way to greater than). In Lesson 9, students pack various grocery items in a big and small grocery bag and say, for example, “This cereal box fits in the big bag.”
Prekindergarten Mathematics Module 4, Topic C
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