# Lesson 15

Medidas de longitud

### Lesson Purpose

The purpose of this lesson is for students to apply their understanding of multiplicative comparison and unit conversion to solve multi-step problems about distances and lengths.

### Lesson Narrative

Previously, students reasoned multiplicatively about measurements and performed unit conversions to solve problems in the context of mass and capacity. In this lesson, they do the same in the context of length measurements, using familiar customary units from earlier grades (yards, feet, and inches).

• Action and Expression
• MLR7

Activity 2: Torres de piedras

### Learning Goals

Teacher Facing

• Use multiplicative comparison and unit conversion to solve multi-step problems about length (in yards, feet, inches).

### Student Facing

• Resolvamos problemas sobre distancias y longitudes.

### Required Materials

Materials to Gather

Building On

### Lesson Timeline

 Warm-up 10 min Activity 1 15 min Activity 2 20 min Lesson Synthesis 10 min Cool-down 5 min

### Teacher Reflection Questions

What misconceptions came to light in today’s lesson? What strategies do you have for showing students that misconceptions are valued as a way to further everyone’s understanding?

### Suggested Centers

• Can You Draw It? (1–5), Stage 4: Area and Perimeter (Supporting)
• Rectangle Rumble (3–5), Stage 3: Factors 1–10 (Supporting)