# Lesson 18

Día 3 de centros

### Lesson Purpose

The purpose of this lesson is for students to count, compare, and write two-digit numbers.

### Lesson Narrative

In the first activity, students learn a new center called Get Your Numbers In Order. In the second activity, students organize, count, and represent collections, and write numbers.

### Learning Goals

Teacher Facing

• Count objects in a collection and record the count.
• Create, compare, and order two-digit numbers.
• Write numbers up to 99.

### Student Facing

• Juguemos juegos sobre decenas y unidades.

### Required Materials

Materials to Gather

Materials to Copy

• Get Your Numbers in Order Stage 1 Gameboard, Spanish

### Required Preparation

Activity 1:

• Put each gameboard in a sheet protector.

Activity 2:

• Gather materials from previous centers:
• Greatest of Them All, Stage 1
• Grab and Count, Stage 2
• Write Numbers, Stages 1 and 2

### Lesson Timeline

 Warm-up 10 min Activity 1 20 min Activity 2 20 min Lesson Synthesis 10 min

### Teacher Reflection Questions

When do your students feel successful in math? How do you know?