Lesson video

To find one quarter of a shape.

Hello everybody it's Miss Sidhu here and we're going to be using great maths today.

In this lesson today we will be finding one quarter by dividing the whole into four equal parts.

Welcome to today's lesson, you will need a piece of paper and a pencil to write the answers, some pieces of paper that you can use to fold, and some slices of bread to find the quarters.

There are times when you will have to pause the video to have a go at some of the activities yourself, now let's get started.

We are going to look at the key vocabulary as star words.

Finding one quarter.

Exploring parts to find a quarter.

An independent task and answers.

And finally a quiz to see everything we have learned.

Star words, star words.

My turn first then your turn.

Part.

Whole.

Quarter.

Divide.

Equal.

Unequal.

We will be using these star words throughout our lesson today.

The first, we have got a brain teaser to warm up our brains.

Are the shapes split in half, yes or no? Have they been divided into two equal or unequal parts? So think about if it's yes or no.

I want you to pause the video and have a go.

Pause and freeze, macaroni cheese.

How did you get on? Were you able to find the shapes that was split in half? Here we've got our square.

Which is yes, it's been split into two equal parts.

We've got our triangle that has been split into two equal parts.

And let's have a look at another shape that we can see if it's splits into two equal parts.

Ah, here we go, another shape that we have split into two equal parts.

So they've been split into half.

Here we've got a rectangle that hasn't been split into parts.

And the arrow.

And also the cross.

How did you get on? Did you do a good job? Well done, let's give ourselves a fannnnntastic.

Now I think we're ready to do today's learning.

Here is a big picture, we've got Anancy the spider and turtle.

Anancy and turtle are having a diner party, mm yum yum.

Turtle forgot to go to the shops.

So there is only one napkin but there are going to be four guests.

Anancy, turtle, the crab, and a fish.

How many parts do we need to get from one napkin? Hmm have a think, remember we've got four guests.

So how many parts do we need to get from one napkin? That's right we need four parts for our four guests.

We need a part for Anancy, a part for turtle, a part for the crab, and a part for the fish.

Now, hmm, how will we make it fair? Can you say it nice and loud? Well we can make it fair by making four equal parts.

Here we've got a napkin.

What is the same? What is different? So I have folded this paper, so like the napkins on the screen, I have folded this paper, to show the four parts.

You might want to try this at home.

So folded my paper, into four parts.

On my second paper, what I'm going to pretend it's a napkin, I've folded it into four parts as well.

What is the same? What is different? Having a think.

With my first piece of paper, or napkin, the first napkin is equal, as there are four equal parts.

They are all the same.

Same, same, matchy, matchy.

The second napkin, or piece of paper, is unequal, as the four parts are unequal, they are not the same.

So the first napkin is equal.

The second napkin is unequal.

Did you get the same as me? Well done, give yourselves a clap.

The whole has been divided into four equal parts.

So how many equal parts are there? The whole has been divided into four equal parts.

How do you know it is in quarters? So the whole.

ah, so we know because the whole is being divided into four equal parts, remember one of our star words are equal.

So we are finding quarters, the whole is split into four equal parts, so each guest will get one quarter, so one quarter for Anancy, one quarter for turtle, one quarter for the crab, and one quarter for the fish.

Now let's see what our next activity is going to be.

For today's activity, I want you to fold the paper to show four equal parts, like this.

To make sure they are equal I have matched the corners together and folded super carefully.

I think this shape has been folded into roughly four equal parts because the edges are close together making the four parts equal.

Then I want you to fold the paper to show four unequal parts.

So I've folded mine like this.

I think this shaped is folded into four unequal parts because the edges do not line up and there is an overlap.

I want you to pause the video and have a go at folding the paper.

How did you get on? I hope you did lots of folding showing the four equal parts and the four unequal parts.

Here we have our big picture again, now can you find the cakes? Here we've got some cupcakes there and some cupcakes here.

The cake is going to be shared between Anancy, turtle, the crab, and a fish.

I need some help to share a cake between the four guests.

Hmm, how can we cut the cakes so the animals get a piece each and that it is fair? Oh, have a look at the picture of the cake, doesn't it look delicious? It looks a little bit like a sunflower.

So how can we cut the cake so the animals get a piece of it each and that it is fair? How many pieces will we cut it into? Can you show me or shout it out to the screen? That's right, we can cut the cake into four equal parts.

Which is the same as four equal pieces of cake.

Here is the cake, and I have cut it into two equal parts.

The whole has been divided into two equal parts, one part is half of the whole, so we've got a half and a half.

But we need to cut it into four equal parts.

So the whole has been divided into two equal parts.

One part is half of the whole.

But have we got for equal parts? I can see lots of you shaking your head.

Hmm, so the cake is the whole, but we still need to cut the cake up.

So let's cut each half again into two equal parts so that we can get four quarters.

So let's cut the first half into another half, so now we've got quarters and the second half.

How many parts have we got now? Can you show me on your fingers? After three.

One.

Two.

Three.

Super, we have now got four equal parts, the whole is cut into four equal parts.

Or we can say the whole is cut into four quarters.

So Anancy, turtle, the crab, and the fish will get one quarter each.

Ah, I think you've been doing some amazing learning today, I think you are ready for your independent tasks today.

For today's task I want you to explore cutting the slices of bread in half and then into quarters.

So how many ways can you divide a slice of bread into quarters? So can you divide the slice of bread into quarters? How do you know it's quarters? And can you show the slices of bread into unequal parts? So how many ways can you show the slice not being divided into quarters? Hope you have lots of fun and make sure you have an adult with you to help you at all times.

Here is our challenge, we have got some different bar modules there.

Can you describe the bar models using our star words? Now I want you to have a go at the independent task and the challenge and make sure you pause before you get to the answers.

Good luck and enjoy exploring quarters.

Here are some of the ways that you can show quarters.

The whole has been split into four equal parts.

You might have find some other ways.

Here are the answers for the challenge.

So can you describe the bar models using our star words? We've got the whole at the top and then we have a part, which is a half, and another part, which is the other half.

Then our bar, the whole, has been split into four equal parts, one, two, three, four parts, and each part is one quarter.

How did you do? Have you had fun today? I want you to share your work with Oak National.

Please ask your parents or carer to share your work on Twitter tagging @OakNational and #LearnwithOak.

You were great today at finding a quarter.

Now don't forget to complete your end of lesson quiz.

Bye.