Lesson video

Hi, everyone, my name is Miss Sabzvari and I'm really excited you decided to join me here for our maths lesson.

The unit we're studying is fractions.

In the previous lesson, we focused on identifying fractions of shape with different numerators.

In this lesson, we'll focus on identifying unit fractions of quantity.

So when you're ready, let's begin.

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

So first we'll begin by looking at half of a quantity.

Then we'll move on to a talk task.

After that, we'll be looking at some statements and deciding whether they're true or false.

And finally, you will complete your independent task.

Before we begin today's lesson, you'll need the following items. You will need something to write with and something to write on and you will need some cubes or counters.

Alternatively, you can ask your parents or carer to cut out some small pieces of paper that you can use instead.

So please pause the video now and get the items that you need.

Half of a quantity.

Tell your screen what does quantity mean.

Great job, so quantity is another word for amount.

Okay, so so far, in our previous lessons, we've been looking at finding halves, thirds and quarters of shape, and now we're going to be looking at quantity with an amount.

Great job.

So have a look at the shapes on your screen.

And I would like you to do is to write down what fraction of each shape is shaded.

Pause the video now.

Great job.

So let's have a look at the answers.

So I can see that my first shape has been divided into two parts, okay? So the way I'm going to write my fraction is first I'm going to begin by drawing my vinculum.

Then I'm going to write two as my denominator because there were two equal parts.

And my numerator is going to be one because one part is shaded or highlighted.

Great job.

Moving onto my second shape.

I can see that again my shape has been divided into two parts, okay? So my denominator is going to be, tell your screen, two.

And both parts have been highlighted, therefore my numerator is also going to be two.

Excellent job.

So follow with me.

Here is a picnic that James and Sally are going to share equally.

Can you tell us what each of them will have? Pause the video now and tell me you know and what is unknown.

Great job.

So we know that there are two people and they're trying to share their food between them equally.

Okay? So we're sharing between two equal groups.

What fraction could I write to represent sharing into two equal groups? Write that down.

Great job, so let's have a look.

First, I'm going to draw my vinculum, and I know that they're going to be two equal groups and each group is going to get one part Okay? So we're sharing all of the food into two.

And each person's going to get get one part.

Great, so what I would like you to do now is to draw your part-whole model to represent one half.

Do that now.

Great job.

So I have got my part-whole model here and I'm going to share the orange juice.

I'm going to have the orange juice, okay? So I'm going to share it into two equal groups.

Half of two is one.

Great, now what I would like you to do is to use your counters.

Okay.

And to share the food equally between Sally and James.

Great job, so let's have a look.

We know that if I share my orange juice into two equal groups, half of two is one.

I know that half of four is two.

I know half of four is two.

So they're both going to get two sandwiches each.

And I know that half of eight is four.

Great job if you got all of that correct.

Great job so moving on to a talk task.

What I'd like you to do is to find half of one of the food or drink options on a part-whole model.

And then I would like you to say the fraction.

Okay.

So here is a picnic that Amy and Jess are going to share equally.

Can you tell us what each of them will have? So using your part-whole model, I want you to find a half of six, half of two and half of two.

Do that now.

Excellent job.

So having a look at the answers, I know that half of six is three.

I know half of two is what? Excellent, it's one.

True or false? One quarter of 12 is the less than one half of six.

So what I would like you to see is to pause the video here and to draw your two part-whole models.

Do that now.

Great job.

Now I would like you to use your counters to find one quarter of 12 and to find one half of six.

Do that now.

Great job, so is this statement true or false? Tell your screen.

Great, let's have a look at the answers together.

So one quarter of 12.

Here on my part-whole model, I have four parts because I'm sharing my 12 into four equal parts, okay? So one quarter of 12 is equal to three.

And here on my part-whole model, I have two parts because I'm sharing my whole, which is six, into two equal parts, okay? And one half of six is equal to three.

So is one quarter of 12 less than one half of six? Great job, it's false because both are equal to three.

One quarter of 12 is equal to three and one half of six is equal to three.

Therefore one quarter of 12 is not less than one half of six.

So, moving to our independent task.

Now this is what I would like you to do, okay.

I would like you to investigate these statements by using your manipulatives on your part-whole models, okay? And then I would like you to record your findings on part-wholes models.

And to complete the sentence starter, "This is true," or "This is false because." Okay, so you have two statements here.

So on your part-whole models, I would like you to use manipulatives to show one quarter of 12 and one quarter of 16.

Then I would like you to say if this statement is true or if it is false and why.

Then we'll go through the answers together.

Great job, so let's have a look at the answers.

Te first statement states that one quarter of 12 is the same as a one quarter of 16, okay? So let's have a look.

We've got 12 and we are sharing.

We're dividing it into four equal groups because it's one quarter.

So remember our whole is being shared into four equal groups.

And we want to know what the value of one of those groups are, okay? So the value of one group is going to be three.

So one quarter of 12 is equal to three.

My turn, your turn.

One quarter 12 is equal to three.

Great job.

Having a look at one quarter of 16, I can see that one quarter of 16 is equal to four.

Great job.

So is one quarter of 12 the same as one quarter 16? This statement is false because one quarter of 12 is not the same as one quarter of 16.

Great job.

Having a look at our second statement.

I can see it says that one quarter of eight is greater than one half of eight, okay? So is this statement true or false? Let's have a look.

So we've got eight and one quarter of it is equal to two.

Okay, so if we divide eight into four equal groups.

And half of eight is equal to four.

That's right.

So a quarter eight is not greater than half of eight.

Great job.

And that's it from me.

If you'd like to, please ask your parents or carer to share your work on Twitter, tagging @OakNational and #LearnwithOak.

And now it's time for you to complete your end of lesson quiz.

See you next time.