Lesson video

Hello, I'm Mrs. Cayley and I'm going to help you with your learning today.

So in today's lesson we will explain that an ordinal number shows the position of an object, not a set of objects.

Here's the outcome of today's lesson.

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

Now you might not have heard of ordinal and cardinal numbers before, but you'll probably recognise them when you see them.

So let's have a look at today's keywords.

Here are the keywords for today's lesson.

So we've got ordinal and cardinal.

Can you say those two after me? So my turn, ordinal, your turn.

My turn, cardinal, your turn.

Now ordinal means the word that we use to describe the position of an object when objects are put in order or in a line or in a list.

And cardinal tells us the total amount in a set.

Then we've got some of the ordinal numbers here.

We've got first, second, third, fourth, and fifth.

Can you say those after me? My turn, first, your turn.

My turn, second, your turn.

My turn, third, your turn.

My turn, fourth, your turn.

My turn, fifth, your turn.

And there are some more ordinal numbers as well, it does carry on.

Let's have a look at today's lesson outline.

So we will explain that ordinal numbers show a position and not a set of objects.

So first of all, we will look at ordinal numbers and then we will be comparing cardinal and ordinal numbers.

Let's have a look at the first part of the lesson.

Here are some children that are going to help us today.

We've got Andeep and Laura.

Let's start on the learning.

We're going to find out about ordinal numbers.

These cars are lining up at the traffic light.

Can you see the cars in a line at the traffic light? The car at the front is first in the line.

Wonder which car is first in the line.

That's right, the black car is first in the line and we can write it like this with a number one and the last part of the word first.

The other cars are second, third, fourth, and fifth in the line.

I wonder which one is second.

That's right, the yellow car.

Which one is third? Yes, the blue car.

Which one is fourth in the line? The green car.

And which one is fifth in the line? That's right, the red car.

That's fifth or last in this line, isn't it? Because there's only five in this line.

Ordinal numbers tell us the position of an object.

We can use ordinal numbers with the numbers in or we can use the words first, second, third, fourth, and fifth.

More cars join the line.

The car at the front is still first in the line, so the black car is still at the front of the line, so it's first.

What can we say about the other cars? We've got second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth.

And if you look at the numbers, they're going up in order, aren't they? Ordinal numbers tell us the position of an object.

That means where it is in the line or in a list.

So here we've got first, second, third, fourth, fifth, sixth, seventh, eighth, ninth, and tenth.

And you can go further as well.

This is how the ordinal numbers are represented.

So you can write them as a word or you can write them with a number in.

So we've got first, second, third, fourth, and fifth.

Laura said, "Some of these look like the number words." I wonder which ones look a bit like the number words.

Third looks a bit like the number three.

Fourth looks a bit like the number four.

Fifth looks a bit like the number five.

This is how some more ordinal numbers are represented.

We've got sixth, seventh, eighth, ninth, and tenth.

Andeep is asking, "Which ones look like the number words." These all have number words in them.

Have you spotted some? So we've got six, seven, eight, nine and ten and they've just added th on the end.

We can use our counting to help us.

So some of these ordinal numbers look like the numbers when we are counting.

Let's check your understanding.

Who do you agree with? Laura said, "The black car is fifth." Andeep said, "The black car is first." Now look carefully at the cars.

They're all lining up at the traffic light.

So think about whether the black car is fifth in the line or is the black car first in the line? Pause the video and think about this one.

Who did you think was correct? It was Andeep, the black car is first in the line.

It's nearest to the traffic light, isn't it? It's nearer to the front of the line.

Let's check your understanding again.

Who do you agree with this time? Laura said, "The red car is fifth".

Andeep said, "The red car is first." Now look carefully at the front of the line where the traffic light is.

Think about who do you agree with.

Pause the video and decide.

That's right, Laura was correct.

The red car is fifth in the line.

It's at the back of this line.

Let's check your understanding again.

Who do you agree with this time? Laura said, "The blue car is third." Andeep said, "The blue car is three." Who do you agree with? Pause the video while you think about this one.

That's right, Laura was correct.

We say the blue car is third in the line.

We don't say the blue car is three in the line.

Let's check your understanding.

Who do you agree with? Laura said, "The yellow car is two." Andeep said, "The yellow car is second." Look carefully at where the cars are lining up.

Pause the video and think about who you agree with.

That's right, Andeep was correct.

The yellow car is second in the line.

Let's check your understanding again.

Who do you agree with this time? Laura said, "The green car is four." Andeep said, "The green car is fourth." Who do you agree with? Pause the video while you think.

That's right, Andeep was correct.

The green car is fourth in the line, not four in the line.

Here are some cars having a race.

These cars were racing.

Can you see where they started? They both started at the same place.

And can you see the finish flag and the line that they have to cross to finish? Which car came first in the race? Laura said, "The blue car won the race, you can see it crossed the finish line before the red car." Andeep said, "The blue car was first." Do you agree? I wonder what position the red car came.

The red car was second.

Here are some more cars, these cars are racing.

Which car came first this time? Can you see all the cars started at the same place and they have to cross the line to finish.

I wonder which car crossed the line first.

Laura said, "The yellow car won the race, you can see it crossed the finish line before the others." The yellow car was first.

I wonder which car will be second.

The blue car was second.

I wonder which car's going to be third.

The red car was third, so it was last in the race.

Have you ever had a race before with your friends? You might have had a running race or a skipping race or hopping, or you might have raced some toy cars with your friends.

Laura and Andeep are planning to race later today.

Laura said, "We could have a running race." Andeep said, "We could race our toy cars." You too could race with your friends or family after this lesson.

Think about how you might set this up.

How you're going to find out who came first or who came second? Make sure that you both start at the same place and that you know where the finish line is.

Here's a task for you to have a go at.

Can you match the ordinal numbers with their names? So we've got 1st, 5th, 2nd, 4th, and 3rd.

Can you draw a line to match 'em up with the correct word? And then can you put them in the correct order? Here's a second task for you.

Can you label the cars with the ordinal numbers first, second, third, fourth, and fifth.

Can you see a box underneath each car? Can you write the ordinal numbers in those boxes and then colour the first car red, colour the second car blue, colour the third car green, colour the fourth car yellow.

And choose a colour for the other car.

You could draw your own cars and have a go as well.

So pause the video and have a go at your tasks.

How did you get on with your tasks? Did you match the ordinal numbers with their names? So we had 1st I've matched it up to the correct word.

5th matches up with the word fifth, 2nd matches with the word second.

4th matches with the word fourth and 3rd matches up with third.

And did you put them in the correct order? First, second, third, fourth, fifth.

How did you get on with the second part of your task? Did you colour and label the cars with the ordinal numbers? And what colour did you choose for the fifth car? So we asked you to colour the first car red, the second car blue, the third car green, the fourth car yellow and choose a colour for the fifth car.

Let's move on to the second part of the lesson.

We will be comparing ordinal and cardinal numbers.

If you remember ordinal numbers means that we are putting objects in order and seeing what position they are in the line.

Cardinal numbers tell us the total amount in the set.

Ordinal numbers tell us the position of an object.

Cardinal numbers tell us the total amount of objects in a set.

So here we've got two cars.

The black car is first and the yellow car is second.

The yellow car is a second car in the set.

Altogether, there are two cars in the set.

So can you see that the word second and the way that we write second down as an ordinal number has got the number two in it.

Now we've got three cars in the line.

The blue car is the third in the set.

Altogether there are three cars in the set and the word third sounds a bit like three.

Now we've got four cars in the set.

The green car is the fourth in the set.

Altogether there are four cars in the set and fourth sounds a bit like four.

Now we've got five cars in the set.

The red car is the fifth car in the set.

Altogether there are five cars in the set and fifth sounds a bit like five.

Now we've got some children lining up at a door.

The friends are lining up to go home.

Can you see where the door is? And they're all looking at the door.

There are five friends in the set.

Laura is first in the line.

Who is second in the line? Look at who is behind Laura in the line.

That's right, Sam is second in the line.

Who is third in the line? Look at who's behind Sam in the line.

That's right, Andeep is third in the line.

Who is fourth in the line? Who is behind Andeep in the line? That's right, Aisha is fourth in the line.

And who is fifth in the line? Who is behind Aisha? That's right, Alex is fifth in the line.

He's last in this line, isn't he? We can also say that Alex is last in the line.

Let's check your understanding.

Who is correct? Laura said, "Laura is first in the line." Andeep said, "Laura is one in the line." Pause the video, think about who is correct.

That's right, Laura was correct.

Laura is first in the line.

Who is correct this time? Laura said, "There are four children in the line." Andeep said, "There are fourth children in the line." Pause the video and think about who's correct.

Who did you think was correct? That's right, Laura is correct.

There are four children in the line because we are talking about the cardinal number, not the ordinal number.

Let's check your understanding again, who is correct this time? Laura said, "Andeep is three in the line." Andeep said, "Andeep is third in the line." Pause the video and think about who's correct this time.

That's right, Andeep was correct.

Andeep is third in the line.

Because we're talking about the ordinal number, we are looking at the position in the line.

Who do you think is correct this time? Laura said, "Aisha is fourth in the line." Andeep said, "Aisha is last in the line." Pause the video and think about who's correct.

That's right, they were both correct this time.

Aisha is fourth in the line and she's also last in the line because there are four children in the line.

Here's a task for you to have a go at.

Here we've got some lines of cars.

Can you see which way they're all facing? First of all, can you circle three cars? Can you put a circle around the first three cars in the line and then think about what colour is the third car? Then on the second line of cars, can you circle four of the cars? So the first four in the line.

And then think about what colour is the fourth car.

Here's the second part of your task.

Here we've got some towers of cubes.

You could make some towers of cubes like this if you can.

Put the towers in order of size from the smallest to the largest, and then think about what colour is the first tower and what colour is the fifth tower.

So when you've put them in order, you'll be able to see which one is first and which one is fifth.

Here's the third part of your task.

If you've got some cubes, you can use these to help you.

Put five cubes together to make a tower.

Use a blue cube first, use a red cube second, use a green cube third, use a yellow cube fourth, and choose a colour for the other cube.

Draw your cubes and label each cube with the ordinal numbers.

If you haven't got real cubes, you can just draw them on a piece of paper.

So pause the video and have a go at your tasks.

How did you get on with your tasks? First of all, we asked you to circle three cars and I've put a ring around the first three cars in the line.

Then we ask you what colour is the third car? The third car is blue.

On the second line of cars, we asked you to circle four cars.

So I've put a ring around the first four cars.

What colour is the fourth car? The fourth car is green.

Here's the second part of your task.

We ask you to put the towers of cubes in order of size from the smallest to the largest.

When you put them in order of size, you can see that the red tower is first.

So the first tower is red.

The second tower is orange.

The third tower is yellow.

The fourth tower is green.

And the fifth tower is blue.

Did you get them in the right order? Here's the third part of your task or the last part of your task.

We asked you to put five cubes together to make a tower, and we asked you to use the blue cube first.

And the red cube is second.

The green cube is third.

The yellow cube is fourth.

And choose a colour for the fifth cube.

And I chose orange.

The ordinal numbers are shown as well.

Can you see I've put first, second, third, fourth, and fifth.

Does your tower look the same as your friends? You might have done it the same, or you might have done it a bit differently.

We've come to the end of our lesson now.

Today we were explaining that ordinal numbers show a position and not a set of objects.

Ordinal numbers tell us the position of an object in relation to something.

We can use the words first, second, third, fourth, and fifth to show the position of objects.

And we can record this as first, second, third, fourth, and fifth.

Cardinal numbers tell us the quantity or the total amount in a set.

Well done everyone.

See you next time.