. Grade K, Illustrative icon

My Book of Five

Illustrative MathematicsVaries

The purpose of this task is to help students develop fluency with addition facts to 5. The focus in developing fluency should be more than the internalization of facts but on supporting students' natural development of number sense so that students are able to solve computations flexibly and efficiently using their understanding of relationships between numbers. Children's natural development of numbers progresses from the concrete to the abstract, from counting all (e.g. physically making four counters and then making twelve and counting all the counters to get sixteen), to counting on (e.g., counting four more starting at twelve to get to sixteen), to using part-whole.

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