Lesson 28

Alrededor del salón (optional)

Lesson Purpose

The purpose of this lesson is for students to write and solve their own story problems involving addition and subtraction.

Lesson Narrative

This lesson is optional because it does not address any new mathematical content standards. This lesson does provide students with an opportunity to apply precursor skills of mathematical modeling. In this lesson, students use objects in their classroom to create story problems and equations. When students ask mathematical questions that arise from a situation and use mathematical features of a situation to solve a problem, they model with mathematics (MP4).

  • Representation
  • MLR7

Learning Goals

Teacher Facing

  • Add within 20 with three addends.
  • Write and solve story problems.

Student Facing

  • Escribamos problemas-historia de suma y de resta.

Required Preparation

CCSS Standards


Building Towards

Lesson Timeline

Warm-up 10 min
Activity 1 20 min
Activity 2 10 min
Activity 3 10 min
Lesson Synthesis 10 min

Teacher Reflection Questions

What part of the lesson went really well today in terms of students’ learning? What did you do that made that part go well?

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