Lesson video

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Hello everyone, and welcome to math with Ms Dobrowolski.

Today, we'll be comparing volume.

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

First up, I'll be introducing volume, then you'll have your talk task, then we'll be using non-standard units for measuring volume, and finally, you'll be ready for your independent task.

For this lesson, you will need a pencil and a notebook.

If you don't have these items, pause the video now and go get them.


So, let's have a look.

Capacity is the amount a container can hold.

So which of these containers has the greatest capacity? Hmm.

Well, it looks like they all have an equal capacity, because they're all the same height and width.

So they have an equal capacity.

Remember, capacity is how much a container can hold, not how much it's actually holding.

So my turn, your turn.


the amount of container can hold.


Today, we're going to focus our attention on volume.

Volume is how much is in a container.

So my turn, your turn.


how much is in a container.


So remember, all of these containers have equal capacity.

They can all hold the same amount.

However, they have different amounts of volume.

So, let's have a look.

In A, the container is full.

My turn, your turn.


And that's because the container is completely full, I cannot put any more liquid in there.

Container C is almost full.

My turn, your turn.

Almost full.

And that's because if you look at the tippy top, there is some room for more liquid.

So it's almost full.

If we just put a little bit more, it would be full, but it's almost full.

Container D does not have any liquid.

So, it is my turn, your turn.


If container D is empty, can you spot which container is almost empty? Which container? Tell your screen.

That's right.

F is almost empty.

There's only a little bit of liquid in there, so it's not empty, but it's almost empty.

Let's keep going.

Container E is half full.

And that's because it's filled exactly halfway.

If we cut container E in half, the bottom half would be full, and the top half would be empty.

So we say that container E is half full.

That means container G is a quarter full.

If we fill that amount, three more times, it would be full, so G is only a quarter full.

So if you know that G is a quarter full, do you know which container is a quarter empty? Tell your screen.

is a quarter empty.


B is a quarter empty.

At the top, that's a quarter of the container, so it is a quarter empty.

It is already time for your talk task.

So for this talk task, I would like you to order these containers, from least volume to the greatest volume.

But I want you to make sure that you're using the mathematical language, and the vocabulary that we need here.

So I've given you this sentence, and then given you a word bank.

So for example, if I'm ordering from least volume to greatest, I have to start with the container that's obviously empty.

So, D.

This container is empty, and I will put D as my first one.

Now you have to decide what container comes next, which one is nearly empty, a quarter empty, and so on and so forth.

I also then want you to tell me which container is holding the greatest volume of water, and which container's holding the smallest volume of water.

Pause the video now, resume when you're ready.

Good luck.


So, D we said, was empty, so this container was empty.

Next was F.

This container is nearly empty.

And next we had G.

This container was a quarter full.

After that we had E.

This container is half full.

Then we had B.

This container is a quarter empty.

Then we had C.

This container is nearly full.

And last but not least is A.

This container is full, so it has the greatest volume.

It is holding the most liquid.

So that means container A holds the greatest volume of water, and container D holds the smallest volume of water.

I'm going to fill this container using each glass as one unit.

So this glass is a unit of measure.

How many units will I need to fill this jar? Hmm.

I predict I'll need 12.

So let's start.

One unit.


The jar is filled with one unit and it is nearly empty.

So I need one unit, for the jar to be nearly empty.

Remember, each time we need to make sure I fill to the brim, otherwise it won't be fair.

Now the jar is a quarter full.

I have two units in the jar, and it is a quarter full.

The jar is half full.

I poured four units into the jar, and it is half full.


There are six units in the jar, and it is three-quarters full.


There are seven units in the jar, and the jar is nearly full.

There are eight units in the jar, and the jar is full.

For your independent task, you will do the same thing.

You will find a container, and a unit, and use the unit to fill the container.

So for your independent task, you will do what I just did.

Make sure you ask an adult for help getting containers and filling them up.

So fill the container to the given point, then find each volume in units.

So for example, if in your container, you fill it with one unit and it's nearly empty, then you would put volume in units, as one.

Then you keep filling until you're a quarter full, half full, three-quarters full, nearly full, and full.

When you're finished, make sure you have a parent check your work.

You will all have very different answers.

So pause the video, resume when you're finished.

But again, you'll all have really different answers.

Good luck! Great job, everyone.

So if you'd like to, I'd be really curious to see what containers you filled, and what answers you got.

So if you'd like to, you can ask your parent or carer to share your work, on Instagram, Facebook, or Twitter, tagging, @OakNational and #LearnwithOak As always, don't forget to complete your final quiz, and I really hope to see you next time.