Lesson 3
Contemos 2 grupos de dibujos que están en desorden
Lesson Purpose
The purpose of this lesson is for students to count to find the total number of images in 2 scattered groups.
Lesson Narrative
In previous lessons, students have counted to find the total number of objects in 2 groups and the total number of images in 2 organized groups. In this lesson, students continue to put together 2 groups in order to find the total. The focus of the lesson synthesis is on keeping track of images that have been counted so each image is counted once and only once. This is the first lesson where students participate in a cool-down after the lesson synthesis.
- Representation
- MLR8
Activity 2: Contemos dibujos que están en desorden
Learning Goals
Teacher Facing
- Count to find the total number of images given two groups of organized or scattered images, up to 10.
Student Facing
- Descubramos cuántas cosas hay en dos grupos que están en desorden.
Required Materials
Materials to Gather
Required Preparation
Activity 3:
- Gather materials from:
- Roll and Add, Stage 1
- Math Libs, Stage 1
- Match Mine, Stage 1
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 10 min |
| Activity 2 | 10 min |
| Activity 3 | 20 min |
| Lesson Synthesis | 5 min |
| Cool-down | 5 min |
Teacher Reflection Questions
How does the work of this lesson and the previous lesson lay a foundation for solving addition story problems?