Curriculum  /  Math  /  2nd Grade  /  Unit 7: Working with Even, Odd, and Equal Groups  /  Lesson 3

Working with Even, Odd, and Equal Groups

Lesson 3

Math

Unit 7

2nd Grade

Lesson 3 of 12

Objective

Determine if the number of objects in a group is even or odd.

Student-Facing

I can determine if the number of objects in a group is even or odd.

Common Core Standards

Core Standards

  • 2.OA.C.3 — Determine whether a group of objects (up to 20) has an odd or even number of members, e.g., by pairing objects or counting them by 2s; write an equation to express an even number as a sum of two equal addends.

Foundational Standards

  • 1.OA.D.7

Criteria for Success

  1. Understand an even number as one that can be split into two equal groups with no leftovers or pairs of 2 with no leftovers. 
  2. Understand an odd number as one that cannot be split into two equal groups or pairs of 2 without having a leftover. 
  3. Reason and identify odd and even numbers by modeling quantities with two equal groups or pairs.

Tips for Teachers

Lesson Materials

  • Manipulatives (20 per student) — such as counters

Warm Up

5-10 minutes

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Anchor Tasks

15-25 minutes

Problem 1

When a number can be represented by being split into 2 equal groups with no leftovers or into pairs of 2 with no leftovers, it is called an even number.

When a number cannot be represented by being broken up into 2 equal groups or has leftovers when broken up into pairs of 2, it is called an odd number.

a.   Is 8 an even or odd number? Show your thinking.

b.   Is 5 an even or odd number? Show your thinking.

Purpose

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Problem 2

a.   Which carton of eggs has an odd number of eggs? Explain your thinking.

b.   Draw a model to represent 12 eggs. Is it even or odd? Explain. 

c.   Draw a model to represent a total number of eggs that is an odd number. 

Purpose

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Problem Set

15-20 minutes

Target Task

5-10 minutes

Determine if the number of counters in each set is even or odd. Explain your thinking.

a.   

b.   

c.   

Student Response

Additional Practice

Daily Word Problems, Warm Ups, and Center Activities are aligned to the content of the unit but not necessarily to the lesson objective, therefore feel free to use them anytime during your school day.

Word Problems and Fluency Activities

Next

Represent even numbers as a total of two equal addends.

Lesson 4
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Lesson Map

A7CB09C2-D12F-4F55-80DB-37298FF0A765

Topic A: Even and Odd Numbers

Topic B: Composing and Analyzing Arrays

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