Lesson video

Hello, my name is Mr. Tilstone and I'm a teacher.

Give me a thumbs up if you're having a good day.

Give me two thumbs up if you're having a great day.

I'm going to put two thumbs up because I'm having a great day.

Would you like to know why? 'Cause I'm really excited because I get to work with you today on this maths lesson, and maths is my favourite subject.

Are you ready? Let's go! The outcome of today's lesson is this: I can describe how a whole can be divided into parts and recognise equal and unequal parts.

We've got some keywords.

If I say them, will you say them back? Are you ready? My turn, whole.

Your turn! Wow, that was very good.

Let's do another one.

My turn, part.

Your turn.

My turn, equal.

Your turn.

And finally, my turn, unequal.

Your turn.

You are very good at that.

You'll be meeting those words in today's lesson.

Our lesson is split into two parts.

We're learning about parts today.

The first part will be wholes and parts, and the second will be equal and unequal parts.

Let's start by thinking about wholes and parts.

Are you ready? In this lesson, you're going to meet Jun and Aisha.

Have you met Jun and Aisha before? They're going to give us a bit of help with our maths today.

Aisha and Jun are talking about their favourite food.

I wonder what your favourite food is.

I really like curry.

What's your favourite? Well, they're talking about their favourite food.

And as you might see, Aisha says, "I love pizza.

My favourite part is the cheese." Mm.

Do you love pizza too? I do.

I like the cheese too.

That's not the only part of a pizza though, is it? Jun loves pizza too.

He says, "My favourite part is the crust." Ooh, yes.

That is a nice part of the pizza, isn't it? The crust.

Hmm! Do you like pizza? What's your favourite part? Maybe your favourite part's the cheese, like Aisha.

Maybe your favourite part's the crust, like Jun.

Or maybe you can think of a different part of the pizza and that's your favourite.

Pizza is made up of lots of different parts and we've seen two of them already.

We've got the cheese.

We mentioned that.

Cheese is a part.

That's one of our keywords.

We've got the crust.

Crust is a part.

We've got on this pizza tomato sauce.

Tomato sauce is a part.

Maybe that was your favourite part.

I don't know.

We've got the base.

The base is a part.

Maybe that was your favourite part.

And we've got toppings.

There's lots of different kinds of toppings, isn't there? The toppings are a part.

When you put all of the parts together, it makes a pizza.

It makes a whole pizza.

Pizza is the whole, and that's another one of our keywords.

Let's have a look at another food.

Yum, yum! This is making my tummy rumble.

Do you think this cupcake has parts? Hmm? What do you think? The pizza had parts, didn't it? Does a cupcake have parts? Jun thinks they do.

"Yes, I do," he says.

Here's one of the parts, icing.

Icing is a part.

Cherry! Cherry is a part.

Sponge.

Sponge is a part.

The cake case.

Don't eat that by the way.

But that is a part of the cake.

So now we are going to use our special stem sentence.

Mm, is a part.

Will you help me here? If I say a part of the cake, will you say, "Is a part?" Are you ready? The icing is a part.

The cherry is a part.

The sponge is a part.

The cake case is a part.

You've got it.

Is the cupcake a part as well? Hmm? Would we say the cupcake is a part? No, we wouldn't.

The cupcake is the whole, just like we had a whole pizza.

This time, the cupcake is the whole, the cupcake is everything.

When you put all those parts together, you get a whole.

Let's have a little check.

Let's see if you've understood that.

There's another delicious looking food here.

Complete the stem sentences to label the whole and the parts of this sandwich.

So we've got cucumber, bread, tomato, and lettuce.

So you're going to say, "Mm is a part.

Mm is the whole." How many different ways can you finish that sentence? Talk to your partner, practise with your partner, and I'll see you soon for some feedback.

I can make four different sentences there.

What about you? Bread is a part, tomato is a part, lettuce is a part, cucumber is a part.

What's the whole? The sandwich is the whole.

So there's only one way that we can say what the whole is.

This sandwich is the whole.

But in this case, it's got four parts.

Do you think you're starting to understand parts and wholes? Sometimes you can divide a whole into parts by splitting it up.

So Aisha says, "I can divide this tomato into parts by cutting it." There we go.

She's cut the tomato into parts.

"The whole has been divided into two parts," says Jun.

"I can divide this slice of cheese into parts," says Jun.

There we go.

How many parts has he divided that cheese into? Aisha says, "The whole has been divided into three parts." Watch Aisha's strawberry and then complete the stem sentence.

So here's a stem sentence.

The mm, what is it? Has been divided into mm, mm.

You ready? Right! Can you complete that stem sentence? Pause the video.

Let's see.

The, what was it? Whole has been divided into how many? Four parts.

So well done.

Sometimes the whole can be a shape.

You couldn't eat this quadrilateral could you? But it's a shape.

"I can divide this quadrilateral into parts," says Jun.

And he's done just that.

I wonder how many parts he's divided that quadrilateral into.

Aisha says, "The whole has been divided into five parts." Shall we count to check? One, two, three, four, five.

Yes! Aisha says, "I can divide this hexagon into parts." Let's watch.

She's done that.

What could we say this time? Jun says, "The whole has been divided into three parts." Hmm.

Shall we count and check? One, two, three.

I didn't need to count there.

I could sabotage.

I could see there were three parts.

Let's have another little check.

You're doing really well, by the way.

Can you put these words in the correct order to make a sentence that describes this pentagon? Are you ready? Right.

So look at the pentagon.

And here are the jumbled up words.

You've got to put them in the right order.

So at the minute it says: Parts the whole into divided five been has.

Well, that doesn't make sense, does it? But I bet you can make it make sense by rearranging those words.

Pause the video and have a go.

Did you manage to make a sentence that made sense? It goes like this: The whole has been divided into five parts.

Sometimes the whole can be a set of objects.

Jun says, "I can divide the sweets in this bag into parts." The whole has been divided into two parts.

So again, the whole can be a set of objects.

Aisha says, "I can divide the strawberries in this box into parts." Let's see how many parts she makes.

Ah! How many parts can you see? The whole has been divided into three parts.

Each of those plates of strawberries is a part.

Let's have a little check.

How could you divide the pencils in this pot into parts? Complete the stem sentence to describe your parts.

And you might be able to do this with real pencils if you've got them in front of you.

So the whole has been divided into parts.

Pause the video.

How many ways can you do that? Let's have a look! What have we've got here? The whole has been divided into two parts.

What about this time? The whole has been divided into three parts.

What about now? The whole has been divided into four parts.

I wonder if you divided it into a different number of parts.

It's time for some practise.

You're doing really, really well, and I think you're ready for this.

So number one, can you match each part to its whole? So you can see some different wholes there.

Some are foods, some are shapes, some are sets of objects.

Draw a line to match the whole to a part of it.

Number two, say the stem sentences to describe each picture.

So the whole is mm.

The whole has been divided into mm parts.

Can you find more wholes around you and describe their parts using the same stem sentences? What other things have you got in your classroom that you could divide into parts? Rightio.

Pause the video and off you go.

Welcome back.

Are you having fun? Do you feel confident about parts and wholes? Are you getting to be an expert? Let's have a look.

So number one, can you match each part to its whole? Well, that was a pizza that was the whole, and that was a part of the pizza.

Here was a triangle and that was a part of the triangle.

So the triangle was a whole and there was a part of it.

And this is a chocolate cake.

That is the whole.

And that's a part of the chocolate cake.

Here's another shape.

This time it's a hexagon.

And there's a part of that hexagon which happens to be a triangle.

And here's a set of objects, a set of sweets, and that is a part of that set of sweets.

Number two, say the stem sentences to describe each picture.

So the whole is mm.

The whole has been divided into mm parts.

The whole is a pizza.

The whole has been divided into three parts.

That's A.

The whole is a chocolate.

The whole has been divided into two parts.

That's B.

And then for C, the whole is a triangle.

The whole has been divided into five parts.

And then Jun went on a little hunt of his classroom and he found a really good example of parts and wholes.

He found this jigsaw and he used a stem sentence.

The whole is a jigsaw.

The whole has been divided into six parts.

That was a clever example.

Well done, Jun.

What examples did you find, I wonder? Have you shared them with your classmates? Here's Aisha.

She says, "I found this tower of blocks and split it into parts.

And these were my stem sentences." Are you ready? The whole is? What can she say here? A block tower.

And the whole has been divided into two parts.

You're doing really, really well.

I think you're ready for equal and unequal parts, which is our next cycle.

Jun and Aisha are helping their adult to cut up some fruit so that everyone can have a snack.

What do you notice? Aisha says, "The whole has been divided into two parts." And Jun says, "The whole has been divided into two parts." Is that true? Yes, it is.

Both of those fruits have been divided into two parts.

But what did you notice? Aisha says, "Why do my parts look different to your parts?" And Jun says, "You have divided the whole into two equal parts." I'm sure you've heard that word lots of times before.

They're equal.

They are the same! Got the same amount.

Equal parts are parts that are all exactly the same size as each other.

When you are sharing something, we can say it is fair to divide the whole into equal parts so that everyone gets the same amount.

Is that fair? Have they got the same amount? No.

"That's not fair," says Jun.

"Your part is larger than mine." It is, isn't it? I wouldn't be very happy if I was Jun there.

"Don't worry, Jun," says Aisha, "I can make it fair." What could she do? Ah! Now she's cut it into two equal parts.

"Thank you! Now this is fair," says Jun, "because we have equal parts." And I'd be perfectly happy if I was Jun to get that part of the fruit.

Let's have a quick check.

Who has divided the whole into equal parts? And how do you know it? They've got this watermelon? Is it Aisha? Has she divided hers into equal parts? Or is it Jun? Has he divided his into equal parts? Pause the video.

It's not Aisha.

They are not equal parts.

One part is larger and the other part is smaller, so we cannot say they are equal.

That wouldn't be fair.

But Jun has.

Both parts are the same size.

These are equal parts, and that would be fair sharing.

I wouldn't mind which piece I got because they're the same.

They're the same size.

When the whole has been divided into parts that are the same size, you call them equal parts.

When the whole has been divided into parts that are not the same size, you call them unequal parts.

Okay? Have we got that? Equal and unequal.

Jun and Aisha are going to play a game.

They will both choose the same whole.

One of them will divide it into equal parts and the other will divide it into unequal parts.

Here we go.

So there's the whole.

That's been divided into parts.

Would you say they're equal parts? Would you say they're unequal parts? And what about that? Would you say they're equal parts or unequal parts? They've both been divided into four parts.

Aisha says, "The whole has been divided into four equal parts." Yeah, they're all the same size.

And Jun says, "The whole has been divided into four unequal parts." They're different sizes.

They're not all the same size.

Jun and Aisha play the game again.

This time, they choose a shape as their whole.

What do you think? Has that been divided into equal parts or unequal parts? And what about that? Is that equal parts or unequal parts? Are they the same size as each other? Aisha says, "The whole has been divided into four unequal parts." Yeah, they're not the same size are they? Three of them are the same size, but one's a different size, so we can't say they're all the same size.

The whole has been divided into four equal parts.

They are all the same size as each other.

Let's have another check.

Which shape has been divided into equal parts? And how do you know? Is it A? Is it B? Or is it C? Pause the video have a good think and see what you can notice.

B has been divided into equal parts.

Those parts are all the same size as each other.

You can't say that for shape A and you can't say that for shape C.

The parts are different sizes to each other.

When parts are all the same size, they are called equal parts.

When parts are not the same size, they're called unequal parts.

And we can see unequal parts in shapes A and C.

Jun and Aisha play the game again.

This time, they chose a box of strawberries as their whole.

Yummy, yummy.

Okay, what do we think? Do Aisha's plate, has she divided her strawberries into equal parts? Hmm.

And let's have a look at Jun's plates.

Has he divided his strawberries into equal parts? Hmm.

The whole has been divided into three unequal parts.

You wouldn't say that was fair sharing, would you? I wouldn't be happy to get the plate that had got one strawberry on there because that's not the same as the one with three strawberries on.

Whereas with Jun's plates, they're all the same.

They've all got two strawberries on.

So I'd be happy to have any of those plates.

That's fair sharing.

The whole has been divided into three equal parts.

It's time for a quick check for understanding.

Can you rearrange these words into two sentences that describe the sweets in the bowl? So let's have a look at these sweets.

Right! Now, can you rearrange this sentence? At the minute, it's nonsense.

It makes no sense.

I'll read the nonsense sentence.

Equal divided parts the whole into five unequal been parts been has whole divided the five into has.

That didn't make sense, did it? Can you make it make sense? We want two sentences to describe what you can see.

Pause the video.

Let's have a look at those sentences.

The first one is: The whole has been divided into five equal parts.

And we can see that there's five parts and they're all equal.

And in this case the whole has been divided into five unequal parts.

I can see five parts.

They're not all the same.

So they are unequal.

It's time for some final practise.

You're doing so well.

Number one, label each image equal parts or unequal parts.

So you're going to write those words.

Make sure you write those words properly, make sure you spell them properly.

And number two, draw lines on each shape to match the sentence.

Can you find six different ways to match each sentence? So the whole has been divided into four unequal parts.

The whole has been divided into four equal parts.

And there's lots and lots of different ways you can do that.

So be creative with how you draw your lines.

Okay, have fun with that.

Pause the video and I'll see you very shortly.

Welcome back.

I hope you had fun with that.

Let's have a look at some answers.

So label each image equal parts or unequal parts.

So the first one is equal parts, four of them.

The second one, unequal parts.

Very close, but they're not quite the same size.

I think the bottom part's slightly bigger.

Unequal parts, two of them were the same, but one was different.

So we can't say they're all equal.

They're unequal.

And the circle was split into equal parts, four of them.

And these cherries were split into equal parts.

Each plate had three cherries, so they're equal.

And the flowers were in equal parts.

Each vase had two flowers.

They're equal.

So there's many, many possibilities for this, but the whole has been divided into four unequal parts.

Well, you could do that or that or this or that or this or that.

You might have even done some curved lines.

But your parts need to be different in size.

Then what about four equal parts? That was a bit harder I think, wasn't it? Four equal parts.

Did you manage to find six different ways? You did very well if you got six different ways.

That's one possibility.

I bet you came up with that one.

That's a different one.

Well done if you got that one.

So triangles this time, four equal triangles.

That's a different one.

Four equal rectangles.

Four rectangles again.

And four different triangles this time.

But they are all equal in size.

And what about this one? A really unusual one.

Four different pentagons but all equal in size.

We've come to the end of the lesson.

I've had so much fun with you today.

I've really enjoyed teaching you this lesson.

I hope you've enjoyed it too.

Today's lesson has been about equal or unequal parts.

Wholes can be divided into parts and we've seen lots of examples of wholes today, haven't we? From pizzas to circles to bags of sweets.

The whole could be an object, a shape, or a set of objects.

When all the parts are the same size, they are equal parts.

And when all the parts are not the same size, they are unequal parts.

Right! We'll say that again.

See if you can finish the sentence for me this time.

Are you ready? When all the parts are the same size, they are equal parts.

And when all of the parts are not the same size, they are unequal parts.

Well done if you've said that.

When I've done something that I'm really proud of, I like to give myself a little gentle pat on the back.

So why don't you do the same? If you're proud of yourself today, give yourself a pat on the back.

You deserve it.

I hope I get the chance to spend another math lesson with you sometime soon.

But until then, have a lovely day and I'll see you soon.

Bye-bye.