In this chapter, we look beyond the whole numbers at other numbers that are included in school mathematics in grades pre-K to 8, particularly in the upper grades. We first look at the rational numbers ...

Charlie Bardey shows different ways to make 10 when adding two numbers. Charlie Bardey is planning a picnic for friends. He needs to tally the number of people who would like bananas or strawberries.

To many people, school mathematics is virtually a phenomenon of nature. It seems timeless, set in stone—ard to change and perhaps not needing to change. But the school mathematics education of ...