Lesson 14
Compare with Addition and Subtraction
Lesson Purpose
The purpose of this lesson is for students to solve Compare, Difference Unknown story problems and match addition and subtraction equations to the problems.
Lesson Narrative
In previous lessons, students solved Compare problems and wrote equations to match. They considered counting on and counting back to find the difference. This lesson builds on previous work done in this unit by asking students to find two equations that match a story problem and describe how each equation relates to the story problem.
- Engagement
- MLR2
Activity 1: Is It Addition or Subtraction?
Learning Goals
Teacher Facing
- Match addition and subtraction equations to a story problem.
- Solve Compare, Difference Unknown story problems.
Student Facing
- Let’s solve story problems and match them to addition and subtraction equations.
Required Materials
Materials to Gather
Required Preparation
Activity 3:
- Gather materials from previous centers:
- Capture Squares, Stage 1
- Math Stories, Stage 4
- Shake and Spill, Stages 3 and 4
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 15 min |
| Activity 2 | 10 min |
| Activity 3 | 15 min |
| Lesson Synthesis | 10 min |
| Cool-down | 0 min |
Teacher Reflection Questions
What did you say, do, or ask during the lesson synthesis that helped students be clear on the learning of the day?