Lesson 2

Contemos y organicemos

Lesson Purpose

The purpose of this lesson is for students to count objects and notice that the arrangement of a group of objects does not change the number of objects.

Lesson Narrative

Students count the same group of objects in different arrangements several times throughout the lesson. It is important that students repeatedly experience counting the same group of objects in different arrangements to learn that the arrangement does not change the quantity. This understanding develops over time and it is not necessary for all students to articulate at the end of this lesson. Students may continue to recount the same group of objects that has been rearranged until they are confident that the quantity remains the same. This concept will be revisited in future lessons and units.

  • Action and Expression
  • MLR8

Learning Goals

Teacher Facing

  • Count groups of up to 10 objects.
  • Understand that the arrangement of objects does not change the number of objects.

Student Facing

  • Descubramos cuántos objetos tenemos.

Required Preparation

Activity 2:

  • Each group of 2 needs 10 two-color counters and 1 cup.

Activity 3:

  • Gather materials from:
    • Shake and Spill, Stage 1
    • Math Fingers, Stage 1
    • Pattern Blocks, Stages 1-3
    • Picture Books, Stages 1 and 2

CCSS Standards

Lesson Timeline

Warm-up 10 min
Activity 1 10 min
Activity 2 10 min
Activity 3 25 min
Lesson Synthesis 5 min
Cool-down 0 min

Teacher Reflection Questions

What was the best question you asked students today? Why would you consider it the best based on what students said or did?

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