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Lesson Plan

4. Growing Math Skills: Using division to solve word problems involving measurement (l, g, kg) (C)

teaches Common Core State Standards CCSS.Math.Content.3.MD.A.2 http://corestandards.org/Math/Content/3/MD/A/2
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5
teaches Common Core State Standards CCSS.Math.Content.3.OA.A.3 http://corestandards.org/Math/Content/3/OA/A/3
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Lesson objective: Understand that measurement values can be divided. This will extend their previous experiences with division. 

Students bring prior knowledge of division from 3.OA.A.3 and of measurement values 3.MD.A.2. They build on this to divide with measurement values as students work on dividing up liters, grams, and kilograms. A conceptual challenge students may encounter is understanding that numbers can be used to represent a measurement quantity.

This concept is developed through work with pictures, arrays, and a tape diagram which helps students visualize that measurement values represent a quantity of liters, grams or kilograms. These reprsentations help them develop their understanding of numbers representing an amount of something and, in these scenarios, equal amounts of these things.

This work helps students deepen their understanding of numbers as representing a measurement value and that these measurement values can be divided into equal groups. 

Students engage in Mathematical Practice 4 (Modeling with mathematics) as they represent division in different ways including pictures, arrays, and tape diagrams. Students will also engage in Mathematical Practice 7 as they notice that the structure of division remains the same even when working with measurement values.  

Key vocabulary:

  • division/divide
  • equal groups
  • gram (g)
  • kilogram (kg)
  • liter (l)
  • measurement value

 

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Using multiplication and division to solve measurement problems

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