Lesson 14

Expresiones y problemas-historia

Lesson Purpose

The purpose of this lesson is for students to connect expressions to story problems.

Lesson Narrative

In previous lessons, students were introduced to addition and subtraction expressions, as teachers wrote them, as another way to represent story problems. In this lesson, students explain how expressions connect to story problems and choose which expression correctly represents a story problem (MP2).

  • Representation
  • MLR8

Learning Goals

Teacher Facing

  • Interpret expressions in relation to story problems.

Student Facing

  • Descubramos cómo las expresiones corresponden a problemas-historia.

Required Materials

Required Preparation

Activity 3:

  • Gather materials from: 
    • Number Race, Stage 1
    • Math Stories, Stages 1 and 2

CCSS Standards

Lesson Timeline

Warm-up 10 min
Activity 1 10 min
Activity 2 10 min
Activity 3 25 min
Lesson Synthesis 5 min
Cool-down 0 min

Teacher Reflection Questions

What opportunities are you giving students to reflect on their understanding of the mathematical content?

Print Formatted Materials

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Student Task Statements pdf docx
Lesson Cover Page pdf docx
Teacher Guide Log In
Teacher Presentation Materials pdf docx