# Lesson 15

Diferentes tipos de problemas-historia

### Lesson Purpose

The purpose of this lesson is for students to solve a variety of story problems and write equations that match each problem.

### Lesson Narrative

The work of this lesson connects to previous lessons in which students solved Put Together/Take Apart story problems with unknowns in different positions and Compare, Difference Unknown story problems in a way that makes sense to them. They considered addition and subtraction equations that match the same story problem. In this lesson, students solve a variety of story problem types and write equations to match them. Students are encouraged, but not required, to write more than one equation for each story problem.

• Action and Expression
• MLR8

### Learning Goals

Teacher Facing

• Solve a variety of types of story problems.
• Write addition and subtraction equations to represent story problems.

### Student Facing

• Resolvamos problemas-historia y escribamos ecuaciones que correspondan.

### Required Materials

Materials to Gather

### Required Preparation

Activity 3:

• Gather materials from previous centers:
• Capture Squares, Stage 1
• Shake and Spill, Stages 3 and 4
• What's Behind My Back, Stage 2

### Lesson Timeline

 Warm-up 10 min Activity 1 10 min Activity 2 15 min Activity 3 15 min Lesson Synthesis 10 min Cool-down 0 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?