Lesson 11

The purpose of this lesson is for students to connect equations with compositions and decompositions of 10 on 10-frames and fingers.

In previous lessons, students saw equations as one way to represent the answer to a story problem. In this lesson, students make sense of equations in relation to 10-frames and fingers. Students work with many different compositions and decompositions of 10, which will be useful in future lessons when students find the number that makes 10 when added to a given number.

When students match different representations of addition (equations, 10-frames, and fingers) they reason abstractly and quantitatively (MP2).

• Each student needs at least 2 different colored crayons.

• Gather materials from: 
  • Shake and Spill, Stages 1–3
  • Counting Collections, Stage 1
  • Roll and Add, Stages 1 and 2

What makes someone good at math? In what ways are you making assumptions about which of your students are good at math?