# Lesson 13

Día 3 de centros

## Warm-up: Conteo grupal: Contemos hacia atrás, empezando en 100 (10 minutes)

### Narrative

The purpose of this Choral Count is to invite students to practice counting backward by 1 and notice patterns in the count. These understandings help students develop fluency with the count sequence as well as the base-ten structure of numbers.

### Launch

• “Contemos hacia atrás de 1 en 1, empezando en 100” // “Count backward by 1, starting at 100.”
• Record as students count.
• Stop counting and recording at 70.

### Activity

• “¿Qué patrones observan?” // “What patterns do you see?”
• 1-2 minutes: quiet think time
• Record responses.

### Activity Synthesis

• “¿Quién puede describir el patrón con otras palabras?” // “Who can restate the pattern in different words?”
• “¿Alguien quiere compartir otra observación sobre por qué ocurre ese patrón aquí?” // “Does anyone want to add an observation on why that pattern is happening here?”

## Activity 1: Conozcamos: “Números objetivo: Suma números de dos dígitos” (20 minutes)

### Narrative

The purpose of this activity is for students to choose from activities focusing on two-digit numbers. Students are introduced to stage 3 of the Target Numbers center. Then students choose between that center or others previously introduced.

Students choose from any stage of previously introduced centers.

• Target Numbers
• Number Puzzles
• Mystery Number

### Required Materials

Materials to Gather

Materials to Copy

• Target Numbers Stage 3 Recording Sheet, Spanish

### Required Preparation

• Gather materials form previous centers:
• Target Numbers, Stages 1-2
• Number Puzzles, Stages 1-4
• Mystery Number, Stage 1

### Launch

• Groups of 2
• 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

• 8 minutes: center work time
• “Escojan qué les gustaría hacer ahora” // “Choose what you would like to do next.”
• 8 minutes: center work time

### Student Facing

Escojan un centro.

Números objetivo

Acertijos numéricos

El número secreto

### Activity Synthesis

• “¿Qué les gustó de los centros que escogieron?” // “What did you like about the centers you chose?”

## Activity 2: Conozcamos “Cinco en línea: Suma hasta 100 componiendo” (20 minutes)

### Narrative

The purpose of this activity is for students to choose from activities focusing on two-digit numbers. Students are introduced to stage 6 of the Five in a Row center. Then students choose between that center or others previously introduced.

Students choose from any stage of previously introduced centers.

• Five in a Row
• Get Your Numbers in Order
• Grab and Count

### Required Materials

Materials to Gather

Materials to Copy

• Five in a Row Addition and Subtraction Stage 6 Gameboard, Spanish

### Required Preparation

• Gather materials from previous centers:
• Five in a Row, Stages 1-6
• Get Your Numbers in Order, Stage 1
• Grab and Count, Stage 2

### Launch

• Groups of 2
• “Ahora van a escoger otros centros de los que ya conocemos. Una de las opciones es jugar ‘Cinco en línea’ con un nuevo tablero de juego. En este tablero de juego, van a sumar 2 números de dos dígitos que forman una nueva decena” // “Now you will choose from other centers we have already learned. One of the choices is to play Five in a Row with a new gameboard. On this gameboard you will add 2 two-digit numbers that make a new ten.”
• 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

• 8 minutes: center work time
• “Escojan qué les gustaría hacer ahora” // “Choose what you would like to do next.”
• 8 minutes: center work time

### Student Facing

Escoge un centro.

Cinco en línea

Ordena tus números

Agarra y cuenta

### Activity Synthesis

• “¿Qué pudieron practicar en los centros que escogieron?” // “What did the centers you chose help you work on?”

## Lesson Synthesis

### Lesson Synthesis

“¿Cómo les fue trabajando con su pareja en los centros? ¿Qué salió bien? ¿Qué podemos mejorar?” // “How did you and your partner work together during centers? What went well? What can you continue to work on?”