Lesson 16: Selecting the Best Unit
Lesson 16 Learning Objective:
Decide on the most appropriate unit to measure length or distance
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Reflect:
*Reflect in your math journal. Draw, create or write to share your thinking. See Lesson guide 16 for more reflection questions, real life anchoring, playful explorations and creative invitations.
Two students measured the length of a hallway. One used meters, the other used centimeters. They both got a correct answer. How is that possible?
How do you decide if something should be measured in mm, cm, m, or km?
Describe something that you can measure that you find meaningful in your life?
Math Talk:
Have a conversation about this image. Be curious. Be creative. Can you see in different ways?
What is the same and different? What distances and measurements do you notice? What would you use to measure distances in each image? When would you use mm, cm, m and km?
Photos by LM, Summer 2025
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