Lesson plan

# 6. Practice Converting Customary Units - Double Number Line (FP)

teaches Common Core State Standards CCSS.Math.Content.4.MD.A.1 http://corestandards.org/Math/Content/4/MD/A/1
teaches Common Core State Standards CCSS.Math.Content.4.OA.A.1 http://corestandards.org/Math/Content/4/OA/A/1
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4

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Lesson objective: Convert customary units of measure from larger units to smaller units.

This lesson helps to build  procedural skill with measurement conversions. A double number line is used here because it supports the idea that two different measurements can represent the same quantity. This work develops students' understanding that multipication can be used to convert units of measure.

Students engage in Mathematical Practice 4 (model with mathematics) as they create double number lines to show the relationship between two units of measure.

Key vocabulary:

• cup
• feet
• inch
• quantity
• quart

Special materials needed:

• none