Lesson 4

Result or Change Unknown

Lesson Purpose

The purpose of this lesson is for students to solve Add To, Result or Change Unknown, and Take From, Result Unknown story problems and write equations to match each problem.

Lesson Narrative

Since this lesson includes all three of the problem types introduced to the students at this point, students need to pay close attention to each problem to determine the action in the story and the question that is being asked. This lesson provides an opportunity to assess student progress on making sense of different types of story problems, the methods they use to solve, and the equations they write to match the problems.

• Engagement
• MLR8

Learning Goals

Teacher Facing

• Solve Add To, Result or Change Unknown, and Take From, Result Unknown story problems.
• Write an equation and explain why it matches a story problem.

Student Facing

• Let’s solve story problems and write equations to match.

Required Materials

Materials to Gather

Building Towards

Lesson Timeline

 Warm-up 10 min Activity 1 15 min Activity 2 20 min Lesson Synthesis 10 min Cool-down 5 min

Teacher Reflection Questions

Reflect on points during the lesson when you learned the most about your students’ thinking. What structures made those points most valuable in learning about your students? How will you use what you learned in an upcoming lesson?

Print Formatted Materials

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