Lesson plan

# 4. Compare objects by one attribute (C)

teaches Common Core State Standards CCSS.Math.Content.K.MD.A.1 http://corestandards.org/Math/Content/K/MD/A/1
teaches Common Core State Standards CCSS.Math.Content.K.MD.A.2 http://corestandards.org/Math/Content/K/MD/A/2
teaches Common Core State Standards CCSS.Math.Content.K.MD.B.3 http://corestandards.org/Math/Content/K/MD/B/3
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5
teaches Common Core State Standards CCSS.Math.Practice.MP6 http://corestandards.org/Math/Practice/MP6

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Lesson objective: Compare objects by a single common shared attribute.

Students bring prior knowledge of how to identify attributes from Grade K, Unit 08, Lessons 1-3. This prior knowledge is extended to comparing one attribute at a time as students find objects based on a shared attribute and accurately compare them. A conceptual challenge students may encounter is that attributes can be compared to other attributes to describe similarities or differences.

The concept is developed through work with finding objects that have a specific attribute, which will allow students to make the connection that similarities and differences must be shown through like attributes.

This work helps students deepen their understanding of equivalence because they are developing an understanding of how to accurately compare differences and describe them.

Students engage in Mathematical Practice 3 (Construct viable arguments and critique the reasoning of others) as they determine which attribute they will attend to and why, as well as the reasoning behind characters' decisions within the task.

Key vocabulary:

• attribute
• compare
• heavier
• lighter
• longer
• shorter
• weight

Special materials needed:

• Various classroom items for length, height, and weight.