New
New
Year 1

# Ordinal numbers show the position of an object in relation to another

I can recognise, name and represent ordinal numbers and explain the difference between ordinal and cardinal numbers.

New
New
Year 1

# Ordinal numbers show the position of an object in relation to another

I can recognise, name and represent ordinal numbers and explain the difference between ordinal and cardinal numbers.

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## Lesson details

### Key learning points

1. Ordinal numbers indicate a single item or event rather than a quantity.
2. Review how ordinal numbers are named and represented and show the shortened written names.
3. Ordinal numbers contain part or all of the corresponding number words. First and second are exceptions.
4. The difference between cardinal and ordinal numbers is the difference between quantity and position.

### Common misconception

Children may confuse ordinal and cardinal numbers.

Place an emphasis on these numbers in speech throughout the day. Continue to highlight the links between them.

### Keywords

• Ordinal number - A number that tells the position of something in relation to something else.

• Cardinal number - A number that shows how many of something there are.

• First to fifth - Ordinal numbers that describe the position of something.

This lesson progresses from saying ordinal numbers to showing children how they can be mathematically recorded. Allow exploration of the relationship between ordinal and cardinal numbers outside the lesson e.g. set up races, comment when lining up.
Teacher tip

### Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

## Starter quiz

### 6 Questions

Q1.
What mistake has Andeep made in his count?
Correct answer: He said the wrong total.
He counted backwards.
Q2.
Who has counted the cakes correctly?
Andeep
Q3.
Match the number words to the numbers.

one

two

three

four

five

Q4.
Which set has 5 objects?
Set 1
Set 2
Q5.
Andeep thinks there are 5 cars in the line. Is he correct?
No
Q6.
Laura thinks there are 5 cars in the line. Is she correct?
Yes

## Exit quiz

### 6 Questions

Q1.
What can an ordinal number tell us?
The total amount in a set.
Correct answer: The position of an object in a set in relation to something else.
Q2.
Which one of these in an ordinal number?
One
Two
Q3.
Match the ordinal number to the word that represents it.

first

second

third

fourth

fifth

Q4.
Who is first in the line to go through the door?
Sam
Laura
Q5.
Who is fifth in the line to go through the door?
Andeep
Sam