Overview

This part articulates general steps for narrating the construction and use of a representation. These steps are then used to think about the specific work of narrating the construction and use of a number line, in particular, the key mathematical ideas to highlight while narrating.

Key Points

A general process for narrating the construction and use of a representation:

• Make the mathematical problem or context clear.
• Describe how a particular representation is useful for the problem at hand.
• Construct the representation and use it to solve the task, while describing and giving meaning to each step.
• Summarize what the representation has helped to do.