# Lesson 3

Grupos que se ven muy diferentes

## Warm-up: Conteo grupal: Representemos con dedos y números (10 minutes)

### Narrative

The purpose of this warm-up is for students to practice the verbal count sequence to 10 and show quantities on their fingers.

### Launch

• “Cuenten hasta 10 con sus dedos. Cada vez que digan un número, levanten un dedo” // “Count to 10 with your fingers. Each time you say a number, put up 1 finger.”
• Count to 10 as a class using fingers.

### Activity

• “Mientras cuentan y levantan sus dedos, yo escribo los números” // “As you count and put up your fingers, I will write the numbers.”
• Write numbers 1–10 as students count and put up their fingers.

### Activity Synthesis

• Point to “3” and say “Levanten 3 dedos” // “Hold up 3 fingers.”
• Repeat with 5, 6, and 10.

## Activity 1: Más o menos fichas geométricas (10 minutes)

### Narrative

The purpose of this activity is for students to compare the number of objects in groups with very different quantities. Because the quantities are very different, students should be able to visually tell which group has more objects. Students may also match or count each group to compare.

MLR8 Discussion Supports. To support the transfer of new vocabulary to long term memory, invite students to chorally repeat these words in unison 1–2 times: more and fewer.

### Required Materials

Materials to Gather

### Required Preparation

• Each group of 2 needs a bag with 8 to 10 green triangle pattern blocks and 1 to 3 orange square pattern blocks.
• 6 connecting cubes and 2 pattern blocks needed for display.
• 8 orange square pattern blocks and 2 green triangle pattern blocks needed for display.

### Launch

• Groups of 2
• Display a group of 6 connecting cubes and a group of 2 pattern blocks.
• “¿Qué observan? ¿Qué se preguntan?” // “What do you notice? What do you wonder?”
• 30 seconds: quiet think time
• 1 minute: partner discussion
• Share responses.
• “Observamos que hay más cubos encajables que fichas geométricas. Eso quiere decir que hay menos fichas geométricas que cubos encajables. Vamos a seguir observando grupos de objetos para descubrir cuál grupo tiene más y cuál grupo tiene menos” // “We noticed that there are more connecting cubes than pattern blocks. That means there are fewer pattern blocks than connecting cubes. We are going to continue looking at groups of objects to see which group has more and which has fewer.”

### Activity

• Give each group of students a bag of pattern blocks.
• “Saquen de sus bolsas las fichas geométricas. ¿Hay más cuadrados anaranjados o triángulos verdes?” // “Take the pattern blocks out of your bag. Are there more orange squares or green triangles?”
• 30 seconds: quiet think time
• 30 seconds: partner discussion
• “¿Cómo saben si hay más cuadrados anaranjados o triángulos verdes?” // “How do you know if there are more orange squares or more green triangles?”
• Share responses.
• “Descifren cuántos cuadrados anaranjados tienen y díganle a su compañero. Después, descifren cuántos triángulos verdes tienen” // “Figure out and tell your partner how many orange squares you have. Then figure out how many green triangles you have.”
• 2 minutes: partner work time
• “Intercambien su bolsa de objetos con otro grupo” // “Switch your bag of objects with another group.”
• Repeat the steps above, asking “¿Hay menos...?” // “Are there fewer...?” instead of “¿Hay más...?” // “Are there more...?”

### Activity Synthesis

• Display 8 orange square pattern blocks and 2 green triangle pattern blocks.
• “¿Hay menos cuadrados anaranjados o triángulos verdes? ¿Cómo lo saben?” // “Are there fewer orange squares or green triangles? How do you know?” (There are fewer green triangles. We can just see that there are a lot of orange squares and only 2 green triangles.)
• “Hay menos triángulos verdes que cuadrados anaranjados. ¿Cuántos triángulos verdes hay?” // “There are fewer green triangles than orange squares. How many green triangles are there?
• Demonstrate or invite a student to demonstrate moving or touching each triangle as the class counts.
• Repeat the steps with the orange squares.
• “Hay más cuadrados anaranjados que triángulos verdes. 8 es más que 2. Hay menos triángulos verdes que cuadrados anaranjados. 2 es menos que 8” // “There are more orange squares than green triangles. 8 is more than 2. There are fewer green triangles than orange squares. 2 is less than 8.”

## Activity 2: Creemos grupos con más y menos (10 minutes)

### Narrative

The purpose of this activity is for students to make groups with more or fewer objects than a given group of objects. When asking students to make a group that has more objects than the given group, the given group will have very few objects. Similarly, when asking them to make a group that has fewer objects than the given group, the given group will have many objects. This should allow students to create and compare the groups visually. In a future lesson, students will create groups with more or fewer objects than a given group when the quantities are closer, where it will be helpful for students to match or count the objects in each group.

### Required Materials

Materials to Gather

### Required Preparation

• Each group of 2 needs a bag of green triangle and orange square pattern blocks from the previous activity.

### Launch

• Groups of 2
• Give each group of students a bag of 8–10 green triangle pattern blocks and a bag of 1–3 orange square pattern blocks.

### Activity

• “Formen un grupo con fichas que tenga más que el grupo de cuadrados anaranjados” // “Make a group with counters that has more than the group of orange squares.”
• 30 seconds: quiet think time
• 1 minute: partner work time
• “Descifren cuántas fichas tienen y díganle a su compañero. Después, descifren cuántos cuadrados anaranjados tienen y díganle a su compañero” // “Figure out and tell your partner how many counters you have. Then figure out and tell your partner how many orange squares you have.”
• 2 minutes: partner work time
• “Formen un grupo con fichas que tenga menos que el grupo de triángulos verdes” // “Make a group with counters that has fewer than the group of green triangles.”
• 30 seconds: quiet think time
• 1 minute: partner work time
• “Descifren cuántas fichas tienen y cuéntenle a su compañero. Después, descifren cuántos triángulos verdes tienen y díganle a su compañero ” // “Figure out and tell your partner how many counters you have. Then figure out and tell your partner how many green triangles you have.”
• 2 minutes: partner work time

### Activity Synthesis

• Invite 2–3 students to share the groups of counters that they made that have fewer than the green triangles.
• “¿En qué se parecen los grupos que ellos formaron? ¿En qué son diferentes?” // “What is the same about the groups they made? What is different?” (They all made groups with different numbers of counters. They all have fewer than the green triangles.)

## Activity 3: Conozcamos “Carrera con números: Números del 1 al 10” (25 minutes)

### Narrative

The purpose of this activity is for students to learn stage 1 of the Number Race center. Students practice recognizing and writing numbers as they roll a connecting cube onto the mat and trace the number that it lands on. If students do not yet recognize each number, they can match the symbol on the number mat to the symbol on the recording sheet. Students continue rolling and tracing until one number "wins" (all of the numbers in the column are traced). After students have traced all of one number, they can finish tracing the rest of the numbers. Students can use different colors or writing utensils during this center. In a future variation of this center, students will write the numbers instead of tracing them.

After they participate in the center, students choose from any stage of previously introduced centers.

• Shake and Spill
• Math Fingers
• Pattern Blocks
• Picture Books
Engagement: Provide Access by Recruiting Interest. Use visible timers or audible alerts to help students anticipate and prepare to transition between center activities.
Supports accessibility for: Social-Emotional Functioning, Organization

### Required Materials

Materials to Gather

Materials to Copy

• Number Race Stage 1 Recording Sheet for Tracing
• Number Mat 1-10

### Required Preparation

• Each group of 2 needs 1 connecting cube.
• Gather materials from:
• Shake and Spill, Stage 1
• Math Fingers, Stage 1
• Pattern Blocks, Stages 1-3
• Picture Books, Stages 1 and 2

### Launch

• Groups of 2
• Give each student a recording sheet. Give each group of 2 students a number mat and a connecting cube. Give students access to colored pencils, crayons, or markers.
• “Vamos a conocer un nuevo centro que se llama 'Carrera con números'. Juguemos una ronda juntos” // “We are going to learn a new center called Number Race. Let's play a round together.”
• “Voy a lanzar el cubo en el tablero de números. ¿En qué número cayó el cubo?” // “I am going to roll the cube onto the number mat. Which number did the cube land on?”
• 30 seconds: quiet think time
• Share responses.
• “Ahora encuentro ese número en la hoja de registro y trazo el número en la parte de abajo” // “Now I find that number on the recording sheet and trace the number at the bottom.”
• Demonstrate tracing the number the cube landed on.
• Jueguen por turnos con su compañero. En cada turno, lancen el cubo y tracen el número en la hoja de registro. Sigan jugando hasta que tracen todos los números de un mismo número. Ese número es el ganador” // “Take turns with your partner. During each turn, roll the cube and trace the number on the recording sheet. Play until you’ve traced all of one number. That number is the winner.”

### Activity

• 5 minutes: partner work time
• “Ahora pueden escoger otro centro o seguir jugando 'Carrera con números'” // “Now you can choose another center. You can also continue playing Number Race.”
• Display the center choices in the student book.
• Invite students to work at the center of their choice.
• 10 minutes: center work time
• If time, invite students to choose another center.

### Student Facing

Escoge un centro.

Carrera con números

Revuelve y saca

Dedos matemáticos

Fichas geométricas

Libros de imágenes

### Activity Synthesis

• “Cuándo jugaron con un compañero en los centros, ¿cómo decidieron quién iba primero? ¿Qué harían si ustedes quisieran jugar primero, pero su compañero también quisiera jugar primero?” // “When you played in centers with a partner, how did you decide who gets to go first? What would you do if you wanted to go first but your partner wanted to go first too?”

## Lesson Synthesis

### Lesson Synthesis

“Hoy comparamos el número de objetos en distintos grupos. Desciframos cuál grupo tenía más objetos y cuál grupo tenía menos objetos” // “Today we compared the number of objects in groups. We figured out which group had more objects and which group had fewer objects.”

Display 10 red counters and 3 yellow counters.

“¿Hay menos fichas amarillas o menos fichas rojas? ¿Cómo lo saben?” // “Are there fewer yellow counters or red counters? How do you know?”

“Solo mirando, nos damos cuenta de que hay muchas fichas rojas y solo unas pocas fichas amarillas. Hay menos fichas amarillas que fichas rojas. Hay más fichas rojas que fichas amarillas” // “We can just see that there are a lot of red counters and only a few yellow counters. There are fewer yellow counters than red counters. There are more red counters than yellow counters.”

“Descifremos cuántas fichas rojas hay” // “Let's figure out how many red counters there are.”

Point to each red counter as students count or invite a student to count.

“Hay 10 fichas rojas” // “There are 10 red counters.”

Repeat the steps with the yellow counters.

“Hay 3 fichas amarillas” // “There are 3 yellow counters.”

“Hay menos fichas amarillas que fichas rojas. 10 es más que 3. 3 es menos que 10” // “There are fewer yellow counters than red counters. 10 is more than 3. 3 is less than 10.”