# Lesson 7

Hagamos medios, tercios y cuartos

### Lesson Purpose

The purpose of this lesson is for students to recognize halves, thirds, and fourths, understanding that these terms describe equal pieces of the same whole.

### Lesson Narrative

In grade 1, students learned that when a shape is partitioned into 2 equal pieces, the pieces are called halves. They learned that when a shape is partitioned into 4 equal pieces, each piece is called a fourth or a quarter.

In this lesson, students learn that when a shape is partitioned into 3 equal pieces, the pieces are called thirds. They partition shapes into halves, thirds, and fourths. Fourths and quarters should be used interchangeably when discussing 4 equal pieces, so that students are comfortable with both terms.

• Engagement
• MLR8

Activity 2: No es eso

### Learning Goals

Teacher Facing

• Partition circles and rectangles into halves, thirds, and fourths, and describe the pieces.

### Student Facing

• Hagamos medios, tercios y cuartos o cuartas partes.

### Required Materials

Materials to Gather

### Required Preparation

Activity 1:

• Each student needs 3 identical paper rectangles.
• Students could use 3 sheets of construction paper as their 3 rectangles. To save paper, construction paper could also be pre-cut into equal-size rectangles.

### Lesson Timeline

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

### Teacher Reflection Questions

In grade 2, students used halves, fourths, and quarters to describe equal pieces of a shape. How did you see students use this vocabulary in today’s lesson? What support can you offer to students to help them use math vocabulary to describe equal pieces of a shape.

### Suggested Centers

• How Are They the Same? (1–5), Stage 2: Grade 2 Shapes (Addressing)