## Odd or Even

In this lesson, children will differentiate between odd and even numbers by sorting numbers 1-20 into "Odd" or "Even" circles.

### Lesson for:

Toddlers/Preschoolers

(See Step 5: Adapt lesson for toddlers or preschoolers.)

### Content Area:

Algebra

Numbers and Operations

### Learning Goals:

This lesson will help toddlers and preschoolers **meet the following educational standards**:

- Understand numbers, ways of representing numbers, relationships among numbers and number systems
- Understand patterns, relations and functions

### Learning Targets:

After this lesson, toddlers and preschoolers should be **more proficient** at:

- Counting with understanding and recognizing “how many” in sets of objects
- Sorting, classifying and ordering objects by size, number and other properties

## Odd or Even

### Lesson plan for toddlers/preschoolers

#### Step 1: Gather materials.

**20 manipulatives of any kind**(counting bears work well)**A mat with two circles on it****A recording sheet with the numbers 1-20**(with a space next to each number so that the children can write their answers next to the numbers)

**Note**: Small parts pose a choking hazard and are not appropriate for children age five or under. Be sure to choose lesson materials that meet safety requirements.

#### Step 2: Introduce activity.

**Introduce**the concept of**odd**and**even**numbers.**Even**is a number that you land on when you count by twos.**Count**by twos up to 20 and explain that all of the numbers recited are**even**numbers.**Explain**that, when there are an**even**number of items, you and a friend can each have an**equal**amount of that item (you can pair things up).

**Demonstrate**: Ask for two volunteers. Using an**even**number of manipluatives, give each child an item,**counting**as you hand out the items.**Say**: “I have four bears in my hand. I am going to give one bear to Sally and one bear to Billy and another bear to Sally and another bear to Billy. All of my bears are gone. How many bears did I have BEFORE I gave them to Sally and Billy?” (Four) “Do Sally and Billy each have an**equal**(the same) number of bears?” (Yes) “So is four an**even**number or an**odd**number?” (Even)**Say**:**Odd**numbers are the numbers that are not**even**.**Explain**that, when you START with the number one and**count**by twos, the numbers that you land on are**odd**.**count**by twos.**Explain**that, when there are an**odd**number of items, you and a friend cannot have an**equal**amount of that item (you cannot pair them up).**Demonstrate**:Ask for two volunteers. Using an**odd**number of manipluatives, give each child an item.**Counting**as you hand out the items,**say**: “I have five bears in my hand. I am going to give one bear to Sally and one bear to Billy and one more bear to Sally and one more bear to Billy and one more bear to Sally. All of my bears are gone. How many bears did I have before I gave them to Sally and Billy? (5) Do Sally and Billy each have an**equal**number of bears? (No) Can we pair each of Sally’s bears with Billy’s bears? (No) So is the number five an**even**or an**odd**number?” (Even)

#### Step 3: Engage children in lesson activities.

- Each child will receive 20 manipulatives, a sorting mat and a recording sheet with the numbers 1-20 on it.
**Explain**that, just like the children sorted the bears into**even**and**odd**groups, now they will work individually to sort bears and figure out which of the following numbers are**even**and which of the numbers are**odd**.**Explain**the recording sheet.**Say**: “You are going to put your findings on the blank space next to each number. For example, we already know that four is a(n)_____________ number.” (Even) “So you would write**even**next to the number 4.”- To begin, have the children take the number of bears that are on the recording sheet. They will start with the number one and work their way through to number 20.
- When all of the children are done, gather them and go over their recording sheets. Use a sheet of chart paper to record their findings.

**Additional Extensions**

- Use numbers higher than 20 and further
**explain**that all numbers ending with 1, 3, 5, 7 and 9 are**odd**and all numbers ending with 0, 2, 4, 6, 8 are**even**. Give the children big numbers like 456,391 and have them decide if the number is**even**or**odd**just by looking at the number in the ones place. Ask if they can determine even or odd by looking at the last integer (the number in the place furthest to the right).

#### Step 4: Vocabulary.

**Odd**: Number that is not divisible by two, such as numbers that end in 1, 3, 5, 7 and 9 (e.g.,”The number 5 is an**odd**number.”)**Even**:**even**number.”)**Equal**:**equal**number of bears?”)

#### Step 5: Adapt lesson for toddlers or preschoolers.

##### Adapt Lesson for Toddlers

###### Toddlers may:

- Still be working on one-to-one number correspondence
- Have difficulty distinguishing between
**odd**and**even**

###### Child care providers may:

- Use numbers 1-10.
**Count**out the numbers being taken from the bucket and count while**sorting**each of the bears into the two circles - Tell the children before they start
**sorting**the bears which numbers are**even**and which numbers are**odd**. That way, after they**sort**, they will be able to see what**odd**and**even**looks like.

##### Adapt Lesson for Preschoolers

###### Preschoolers may:

- Have easily grasped the concept of
**even**and**odd**and numbers being divisible by two

###### Child care providers may:

- Use numbers greater than 20 and further
**explain**that all numbers ending with 1, 3, 5, 7 and 9 are**odd**and all numbers ending with 0, 2, 4, 6, 8 are**even**. Give the children big numbers like 456,391 and have them decide if the number is**even**or**odd**just by looking at the number in the ones place.

### Suggested Books

by Doris Fisher (Pleasant, SC: Sylvan Dell Publishing, 2006)*One Odd Day*by Doris Fisher (Pleasant, SC: Sylvan Dell Publishing, 2006)*My Even Day*by Trudy Harris (Minneapolis, MN: Millbrook Pr Trade, 2008)**Splitting the Herd: A Corral of Odds and Evens**

### Music and Movement

**This song reviews the concept of even numbers and teaches children that all even numbers can be “split in half.”**Pause the video to ask the children if the examples are even or odd. www.youtube.com/watch?v=Ei19HMn1BxM

**This song teaches the odd digits and shows that any number ending in an odd digit is also odd**. www.youtube.com/watch?v=hMSd7wGuTT4&feature=youtu.be

### Outdoor Connections

**Play any game (Hopscotch, Red Rover)** and pause after every turn to decide whether the number you land on or the number of children in the group is an **even** or an **odd** amount.

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