Ep 112: The Double Open Number Line Model

We sure loved discussing the open number line model last week, but have you ever heard of the double open number line? In this episode Pam and Kim discuss how the double open number line can be used to develop Proportional Reasoning and to think and reason about rates.
Talking Points:

• A Problem String to reason about unit rates and model on a double open number line
• When could an double open number line be helpful in middle school and high school?
• When is a ratio table more versatile than a double open number line?
• What other concepts can a double open number line be helpful for students?
• The percent bar is a double open number line?

Check out our free download on Double Number Lines: https://mathisfigureoutable.com/double