# Lesson 6

Rectángulos y cuadrados

### Lesson Purpose

### 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 **longer**, **shorter**, 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

### 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 |