Lesson 12

The purpose of this lesson is for students to develop fluency with adding and subtracting within 5 as they identify compositions and decompositions of numbers to 5.

Students participate in a How Many Do You See routine and then create their own dot images to use in a version of the routine in small groups. Understanding that numbers can be composed and decomposed in multiple ways is an important step towards adding and subtracting fluently within 5. When they make dot images and share with their partners students practice, through visualization (MP7), fluency for arithmetic facts within 5.

If students need additional support with the concepts in this lesson, refer back to Unit 5, Section A in the curriculum materials.

• Create a set of cards from the blackline master for each student.

• Each student needs the dot image cards from the previous activity.

• Gather materials from:
  • 5-frames
  • Roll and Add
  • Bingo
  • Geoblocks
  • Find the Value of Expressions

As students worked with their partners and small groups today, whose ideas were heard, valued, and accepted? How can you adjust the group structure tomorrow to ensure each student’s ideas are part of the collective learning?