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

Working with Even, Odd, and Equal Groups

Lesson 2

Math

Unit 7

2nd Grade

Lesson 2 of 12

Objective

Determine if a set of objects can be arranged into groups of two.

Student-Facing

I can determine if a set of objects can be arranged into groups of two.

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. Split sets of objects into groups of 2 and notice totals that can be broken up equally and those that cannot. 
  2. Record the number of groups created and, in situations where there is a leftover, note the leftover.
  3. Connect abstract totals to concrete representations, for example, students would represent 7 with 7 counters.

Tips for Teachers

To connect to the previous lesson's work, students are still building their understanding of even and odd by connecting to the idea of 2 equal groups. Instead of seeing even as the ability to form 2 equal groups in this lesson, they see it as forming groups of 2. While in Lesson 1, they reason and notice the number in each group, in this lesson, they reason and notice the number of groups formed.

Lesson Materials

Warm Up

5-10 minutes

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Anchor Tasks

15-25 minutes

Problem 1

For each number given on the Groups of Two? Template, count out the total using counters. Make as many pairs of two as you can. Record your pairs of two and any leftovers.

Purpose

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Set Up

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Problem 2

For field day, each student will need a buddy for the activities. Determine if each class can have all students in groups of 2 or if a student will need to be paired with the teacher. 

a.   Mr. Gibbins's class: 19 students

b.   Ms. Harris's class: 20 students

c.   Ms. Wynn's class: 17 students

d.   Mr. Todd's class: 16 students

Purpose

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Problem Set

15-20 minutes

Target Task

5-10 minutes

While doing the laundry for a trip, Mr. Johnson found 13 individual socks. He needs to pack 7 pairs of 2 socks for his trip. 

Will Mr. Johnson be able to have 7 pairs of socks for his trip? Use pictures, numbers, or words to explain your thinking.

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

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

Lesson 3
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Lesson Map

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Topic A: Even and Odd Numbers

Topic B: Composing and Analyzing Arrays

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