An understanding of the parts-whole relationship within a set is a necessary foundation for operating on and with numbers. Children need to recognize that smaller numbers are contained within larger numbers and be able to describe the parts of numbers. When they can do so, they are building strategies that will later allow them to address a complex problem situation such as, “Junie has 5 pencils. Three of them were given to her by Marcos this morning. How many did she have before?
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Have some Halloween fun with the witch’s tale Room on the Broom. In this lively story by Julia Donaldson and Axel Scheffler, a witch makes room for her animal friends to ride on her broomstick… until there’s one too many animals, and the broom snaps in two. The central question of this book – Is there room on the broom for me? – is a mathematical one.