Lesson plan

6. Building two-digit numbers (A)

teaches Common Core State Standards CCSS.Math.Content.1.NBT.B.2 http://corestandards.org/Math/Content/1/NBT/B/2
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
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Lesson objective: Apply knowledge of place value to compose two-digit numbers.

This lesson provides an opportunity for students to apply their knowledge and understanding of place-value to a mathematical situation. Students are asked to represent two-digit numbers in multiple ways. 

Key Concept students will use: 

  • The first digit of a two-digit number tells us how many tens there are and the second digit tells us how many ones there are.

Skills students will use:

  • Understanding of the counting sequence to 120. 
  • Understanding that two-digit numbers are made of tens and ones.

Students engage in Mathematical Practice 2 (students make sense of the relationship between the numerals and the quantities; students will notice the pattern in the numerals as the quantities those numbers represent change) as they represent two-digit numbers in multiple ways.

Key vocabulary: 

  • arrow cards
  • base-ten blocks