# Lesson 6

### Lesson Purpose

The purpose of this lesson is for students to identify, describe, and compare rectangles and squares.

### Lesson Narrative

Students are  introduced to the geometric terms rectangle and square. While some students may be familiar with these terms, they are formally introduced in this lesson, and all students have an opportunity to use the terms when identifying shapes in the classroom. Students consider the relative length of the sides of rectangles and describe them as longershorter, or the same length.
In kindergarten, it is not important that students articulate the difference between squares and rectangles, only that they can identify examples of each shape. Refer to squares as “un tipo especial de rectángulo en el que los cuatro lados son igual de largos” // “a special type of rectangle with four sides that are the same length,” but do not hold students responsible for the definition. In grade 1, students will distinguish between defining and non-defining attributes of shapes, which will allow them to discuss how squares and rectangles are the same and different.

• Representation
• MLR8

### Learning Goals

Teacher Facing

• Compare the lengths of two shapes.
• Identify, describe, and compare rectangles and squares.

### Student Facing

• Aprendamos los nombres de más figuras.

### Required Materials

Materials to Gather

Materials to Copy

• Rectangle Sort Cards

### Required Preparation

Activity 1:

• Cut out rectangle cards from the blackline master. Each group of 4 needs 1 set of cards.

Activity 3:

• Gather materials from:
• Counting Collections, Stage 1
• Which One, Stage 1
• Picture Books, Stages 1–3
• Bingo, Stages 1 and 2
• Shake and Spill, Stages 1 and 2

### 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

Reflect on how comfortable your students are asking questions of you and of each other. What can you do to encourage students to ask questions?