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- 2.OA.C.3Determine 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.
- 2.OA.C.4Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.

Odd or Even

2nd Grade Math

Â» Unit:

Each Number Has a Place

Big Idea:The big idea of this lesson is for students to be able to determine odd and even numbers and why it would be important to understand odd and even groups.

What Is An Array

2nd Grade Math

Â» Unit:

Getting Ready to Multiply

Big Idea:Repeated addition lays the foundation for multiplication.

Evens and Odds

2nd Grade Math

Â» Unit:

Adding and Subtracting the Basics

Big Idea:Students need to discover that adding any doubles results in an even number. This meets the Common Core Standard for using doubles to identify even and odd.

Does Every Number Have A Partner?

2nd Grade Math

Â» Unit:

Is it Even Or Odd?

Big Idea:Students use ten frames to determine whether a number is even or odd.

Two Digit Numbers: Even or Odd?

2nd Grade Math

Â» Unit:

Is it Even Or Odd?

Big Idea:Students find strategies to determine whether two digit numbers are even or odd.

Explaining odd and even

2nd Grade Math

Â» Unit:

Is it Even Or Odd?

Big Idea:In this lesson students use their place value knowledge and their conceptual understanding of even and odd numbers to use words to explain why a number is even or odd.

Is the Sum Even or Odd?

2nd Grade Math

Â» Unit:

Is it Even Or Odd?

Big Idea:Students solve word problems and determine whether the sum is even or odd using strategies they learned in days prior (drawing a ten frame , counting by two, making equal groups).

Odd and Even Groups

2nd Grade Math

Â» Unit:

Working With Numbers!

Big Idea:In this lesson students will classify, and recognize even and odd numbers in a variety ways.

Division Strategies

2nd Grade Math

Â» Unit:

Strategies That Work

Big Idea:It is time to add a new strategy - division of objects into equal groups - to the student's repertoire.

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.

2.OA.C.4

Use addition to find the total number of objects arranged in rectangular arrays with up to 5 rows and up to 5 columns; write an equation to express the total as a sum of equal addends.