Lesson 8

Grupos diferentes, misma cantidad

Warm-up: Actuémoslo: Otra manera (10 minutes)

Narrative

The purpose of this activity is for students to consider different ways of acting out a story. Students revisit the story from previous lessons. They suggest different ways the story could be acted out. Acting out gives students opportunities to make sense of a context (MP1). In the synthesis, the class acts out the story with either concrete objects or drawings, whichever was not done in the previous lesson.

Launch

  • Groups of 2
  • Display and read the story.
  • “¿De qué se trata la historia?” // “What is the story about?”
  • 30 seconds: quiet think time
  • Share responses.
  • Read the story again.
  • “¿Cómo pueden actuar esta historia?” // “How can you act out this story?”
  • 30 seconds: quiet think time

Activity

  • “Discutan con su pareja cómo pensaron” // “Discuss your thinking with your partner.”
  • 1 minute: partner discussion
  • Monitor for students who suggest using physical objects such as fingers, cubes or students to represent the story, or drawing pictures to represent the story.
  • Share responses. 

Student Facing

Ducks, 3.

3 patitos muy lejos de aquí
a la colina salieron a pasear.
Mamá pata dijo: “Cuac, cuac, cuac.”
Después 3 patitos vio regresar.

Student Response

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Activity Synthesis

  • Read the story together.
  • Act out the story as a class using either concrete objects or pictures, whichever was not done during the previous lesson.

Activity 1: Cuántos ves: 1, 2, 3 (10 minutes)

Narrative

The purpose of this How Many Do You See is for students to recognize and name small groups of dots and describe how they see them.

Launch

  • Groups of 2
  • Display the first image.
  • “¿Cuántos puntos ven? ¿Cómo lo saben?, ¿qué ven?” // “How many do you see? How do you see them?”  
  • 30 seconds: quiet think time

Activity

  • “Usen sus dedos para mostrarle a su compañero cuántos puntos ven” // “Use your fingers to show your partner how many dots you see.”
  • “Cuéntenle a su compañero cuántos puntos ven, cómo lo saben y qué ven” // “Tell your partner how many dots you see and how you see them.”
  • 1 minute: partner discussion
  • Record responses.
  • Repeat with the second image.

Student Facing

¿Cuántos ves?
¿Cómo lo sabes?, ¿qué ves?
Dot image. 1 dot.

Dot image. 2 dots.

Dot image. 3 dots.

Student Response

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Activity Synthesis

  • “Vamos a jugar un juego que se llama '¿Es 3?'. Cuando les muestre dedos o puntos, piensen si es 3. Si es 3, muestren el pulgar arriba. Si no es 3, toquen sus zapatos” // “We’re going to play a game called “Is it 3?” When I show you fingers or dots, think about if it is 3. If it is 3, give a thumbs up. If it is not 3, touch your shoes.”
  • Display each image and ask “¿Es 3?” // “Is it 3?” each time.
  • Display 1 finger, 4 fingers, and 3 fingers and ask “¿Es 3?” // “Is it 3?” each time.

Activity 2: Grupos diferentes, misma cantidad (10 minutes)

Narrative

The purpose of this activity is for students to recognize, name, and match groups with the same number of images. They see that the same number of images can be organized in different arrangements. When students say that two cards match because they have the same number of objects, they attend to precision in their language (MP6). While students may count the groups of images on each card, the number of images in each group stays within 4 so that students can subitize and match the quantities without counting.

MLR8 Discussion Supports. Use multimodal examples to show the meaning of "the same." Use verbal descriptions along with gestures or drawings to show what it means to have the same number of things.
Advances: Listening, Representing
Engagement: Develop Effort and Persistence. Chunk this task into more manageable parts. Some students may benefit from looking at fewer cards to start with. Introduce the remaining cards once students have completed their initial set of matches. 
Supports accessibility for: Visual-Spatial Processing, Organization

Required Materials

Materials to Copy

  • Different Groups, Same Quantity

Required Preparation

  • Create a set of cards from the blackline master for each group of 2.

Launch

  • Groups of 2
  • Display the image from the student book.
  • “Cuando señale cada grupo, muéstrenle con los dedos a su compañero y díganle cuántas cosas hay” // “When I point to each group, show your partner with your fingers and tell your partner how many things there are.”
  • Point to the ducks. 
  • 30 seconds: partner work time
  • Repeat the steps with the cats and dogs.
  • “¿Qué grupos tienen el mismo número de cosas? ¿Cómo lo saben?” // “Which groups have the same number of things? How do you know?” (There are 3 ducks and 3 dogs. They are both 3.)
  • 30 seconds: quiet think time
  • Share responses. 
  • Display or write “3”.
  • “Hay 3 patos y 3 perros. Los dos grupos tienen el mismo número de cosas” // “There are 3 ducks and 3 dogs. They both have the same number of things.”

Activity

  • Give each group of students a set of cards. 
  • “Trabajen con su compañero para emparejar las tarjetas que tienen el mismo número de cosas. Explíquenle a su compañero cómo lo saben” // “Work with your partner to match the cards that have the same number of things. Explain to your partner how you know.”
  • 4 minutes: partner work time

Student Facing

Animal Groups. 3 ducks, 2 cats, 3 dogs.

Student Response

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Advancing Student Thinking

If students match cards that have different numbers of images, consider asking:

  • “Cuéntame más sobre cómo decidiste juntar esta tarjeta con esta tarjeta” // “Tell me more about how you decided to put this card and this card together.”
  • Display a card with 3 images and ask: “¿Cuántas cosas hay en esta tarjeta?” // “How many things are on this card?”. If students answer “3”, ask: “¿Puedes encontrar otra tarjeta que también tenga 3 cosas?” // “Can you find another card that also has 3 things?”

Activity Synthesis

  • Display cards A and E.
  • “¿En qué se parecen estas tarjetas? ¿En qué son diferentes?” // “What is the same about these cards? What is different?” (They both have yellow things. The number is different. There are 4 bananas and 3 stars.)
  • Display cards A and G.
  • “¿En qué se parecen estas tarjetas? ¿En qué son diferentes?” // “What is the same about these cards? What is different?” (They both have 4 things. One has bananas and one has umbrellas.)
  • Display or write “4”.
  • “Estas dos tarjetas tienen el mismo número de cosas. Las dos tienen 4” // “These cards both have the same number of things. They both have 4.”

Activity 3: Centros: Momento de escoger (25 minutes)

Narrative

The purpose of this activity is for students to choose from activities that focus on using math tools and recognizing and naming quantities without counting.

Students choose from any stage of previously introduced centers.

  • Connecting Cubes
  • Pattern Blocks
  • Geoblocks
  • Picture Books

Required Materials

Materials to Gather

Required Preparation

  • Gather materials from:
    • Connecting Cubes, Stages 1 and 2
    • Pattern Blocks, Stages 1 and 2
    • Geoblocks, Stages 1 and 2
    • Picture Blocks, Stage 1

Launch

  • “Hoy vamos a trabajar en centros con nuestras herramientas matemáticas y nuestros libros de imágenes” // “Today you will work in centers with our math tools and picture books.”
  • Display the center choices in the student book.
  • “Piensen qué les gustaría hacer primero” // “Think about what you would like to do first.”
  • 30 seconds: quiet think time

Activity

  • Invite students to work at the center of their choice. 
  • 10 minutes: center work time
  • “Escojan qué quieren hacer ahora” // “Choose what you would like to do next.”
  • 10 minutes: center work time
  • While students work in centers, ask:
    • “¿Qué hicieron con los cubos encajables, las fichas geométricas o los bloques sólidos geométricos?” // “What did you do with the connecting cubes, pattern blocks, or geoblocks?”
    • “¿Qué grupos de cosas vieron en su libro? ¿Cuántas cosas hay?” // “What groups of things did you see in your book? How many things are there?”

Student Facing

Escoge un centro.

Bloques sólidos
geométricos

Center activity. Geoblocks.

Cubos encajables

Center activity. Connecting cubes.

Fichas geométricas

Centers. Pattern blocks.

Libros de imágenes

Center activity. Picture books.

Activity Synthesis

  • Invite previously selected students to share their picture book page. 
  • “¿Qué grupos ven en la página del libro de imágenes de _____?” // “What groups do you see in _____’s picture book page?”

Lesson Synthesis

Lesson Synthesis

“Hoy emparejamos grupos que tenían el mismo número de cosas” // “Today we matched groups that had the same number of things.”

Display card C from the second activity. 

“Muéstrenle o díganle a su pareja cuántas cosas hay en esta tarjeta” // “Show or tell your partner how many things are on this card.” (Students say “3” or show 3 fingers.)

“¿Cuáles grupos de cosas que hay en nuestro salón tienen 3 cosas?” // “What are some groups of things in our classroom that have 3 things?” (There are 3 windows. There are 3 hearts on the bulletin board.)

Cool-down: Unidad 1, punto de chequeo de la sección B (0 minutes)

Cool-Down

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