Lesson plan

8. A bucket of seashells: make a ten (FP)

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teaches Common Core State Standards CCSS.Math.Content.1.OA.A.1 http://corestandards.org/Math/Content/1/OA/A/1
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
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Lesson objective: Add 2 single digit numbers with a sum less than 20 by using the make a ten strategy.

This lesson helps to build procedural skill with whole number addition. Number bonds and ten frames are used here because a ten frame reinforces a unit of ten and provides a visual of how many ones make a ten.  A number bond clearly demonstrates how numbers can be broken apart into two parts. This work develops students' understanding that make a ten is an efficient strategy for adding whole numbers.

Students engage in Mathematical Practice 7 - Look for and make use of structure as they decide how to compose and decompose numbers to make a ten.  By determining what how much more a number needs to make a ten and then decomposing the second number to make the ten, students are building a foundation for using the make a ten strategy for adding larger numbers. 

Key vocabulary:

  • add
  • broken apart
  • group
  • number bond
  • ten frame
  • sum
  • make-a-ten

Special materials needed:

  • counters, double tens frame
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