Unit 6, Lesson 11
Solve Problems Involving Time (Part 2)
Grade 3
Preparation
Lesson Purpose
The purpose of this lesson is for students to solve problems involving addition and subtraction of time intervals in minutes.
Lesson Narrative
In this lesson, students use any strategy and representation to solve problems involving elapsed time. The problems involve unknowns in all positions: start time, end time, and duration. When students recognize the mathematical features of familiar real-world objects and use those features to solve problems, they model with mathematics (MP4).
This lesson has a Student Section Summary.
- Representation
- MLR8
- Explain (orally) strategies for solving elapsed-time problems with the unknown in all positions.
- Let’s solve more problems involving time.
Required Materials
Activity 1
Required Preparation
Activity 1
- Display students’ ideas from the Lesson Synthesis in the previous lesson.
Teacher Reflection Questions
Who did math today in class and how do you know? Identify the norms or routines that allowed those students to engage in mathematics. How can you adjust these norms and routines so all students do math tomorrow?
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