Lesson video

- Hello, my name's Miss Jones, and I'm going to be teaching you maths today.

I thought I'd start the lesson with a little joke.

Are you ready? What did the spelling book say to the maths book? Have a think.

Go on, tell me what you think? Shall I tell you? The spelling book said I can always count on you.

Let's start today's lesson.

Today we're going to be estimating and measuring in litres.

Here's the lesson agenda.

We'll start with the new learning where we'll look at containers and how much they hold, and how to measure how much they are holding.

Then there'll be a talk task, followed by an independent task, and then finishing with the post-quiz.

You will need a pencil and some paper, and you might like to collect some containers round your house.

I will be giving more instructions on what you might need or could use later on in the lesson but remember to ask a parent or career first if you're allowed to do so.

Pause the video whilst you collect these items if you haven't done so already.

Let's start our new learning.

Here we have a key word, the word capacity.

I'm going to say the word and then it's your turn to say it back to the screen.

Are you ready? Capacity.

Your turn.

Great job.

The capacity of a container tells us the amount it can hold.

Just as length is measured using centimetres and metres, weight is measured using grammes and kilogrammes and temperature is measured using degrees Celsius.

We need a unit of measurement to show how much a liquid a container might hold.

We could use the measurement of litres.

Here are some containers that hold one litre.

Can you think of any other containers that may have a capacity of one litre? I'm going to pause to give you time to think.

Are you ready? Go on.

Tell the screen of some containers that you thought of.

Off you go.

Great.

I had a think too.

Here I've got a bottle of water.

It is one litre and I know it's one litre because on it it says one L, which stands for one litre.

Now we're going to think of other containers that may have a capacity less than one litre.

So not as much that is in my water bottle.

Here are some pictures of containers that hold less than one litre.

Can you think of any others? I'm going to pause to give you time to think.

Are you ready? Tell the screen the containers you thought of.

Great, I thought of my sunscreen.

My sunscreen is less than one litre.

Now we're going to think of containers that are more than one litre.

Here are some pictures of containers that hold more than one litre.

Can you think of any other containers that hold or have a capacity of more than one litre? I'm gonna pause to give you time to think.

Go on, tell the screen.

Brilliant.

I've got my big water bottle.

I know my big water bottle holds more than one litre because on it it says two litres and that's more than one litre.

Are these containers full to capacity? How do you know? I'm gonna pause to give you time to think.

Are you ready? After three, tell me whether you think these containers are full to capacity by telling the screen.

Three, two, one.

Great, let's talk about it together.

This container and this container and this container, all three of these containers are full to capacity.

I know they're full to capacity because they hold as much water, as much liquid as the container can possibly hold.

This container and this container are not fulled to capacity because they are not as full as they could be.

Sometimes, the containers may not always be full, like this container and this container.

We then talk about the volume of liquid in the container.

So now it's time for your talk task.

Just like I've collected objects, containers, from around my house that are more than a litre, less than a litre and the same as a litre, I would like you to ask your parent or carer first if you can, find things around the house that have a capacity of less than one litre, a capacity of one litre, or a capacity of more than one litre.

And when you've found them, to say this sentence below aloud.

I'm gonna show you just how to do it.

Here we go.

So with my water bottle.

This water bottle has a capacity of one litre.

This sun cream has a capacity of less than one litre.

This water bottle has a capacity of more than one litre.

Pause the video whilst you complete your talk task.

Click resume when you are ready.

Which container do you think has the greater capacity and why? The bottle or the jug? Pause the video whilst you have a think and click Resume when you're ready.

Are you ready to share your ideas? Go on.

Tell the screen.

Which container do you think has the greatest capacity? The water bottle or the jug? Off you go.

Interesting.

Now, in fact, by looking at the pictures, we don't know for certain which one has the greatest capacity.

But the water bottle isn't necessarily the container that has the greatest capacity just because it is taller.

We need to bear in mind the shape of our containers.

The jug may have the greater capacity as it's shorter but it is wider.

For example, my water bottle is bigger than my, well, looks bigger anyway than my milk bottle.

But in fact, they both hold the same capacity.

Now we're going to measure the volume by reading the scales.

Here, the scales go up in intervals of one.

And the waterline lands directly on one of the intervals.

The measurement is three litres.

Let's look at another scale.

This time we're not given all the intervals, so we need to work out, and I would like you to pause and have a think where you think 2 and 1/2 litres is.

Are you ready? Can you point to where you think 2 and 1/2 litres is? Off you go.

Great.

You will have noticed the scale interval numbers go up in ones but there is a line, a mark in between each number, which marks halfway between the numbers.

It's asking us well, 2 and 1/2, which is halfway between two and three.

So your finger should be pointing on this mark here.

Well done if it was.

Now it's time for your independent task.

For your independent task today, measure the volume by reading the scales.

Look at the intervals the scales are going up in carefully and what each mark represents.

There's an extra challenge to find different containers, which have a capacity of more than one litre, one litre, less than one litre and to record your answers in this table.

Here are the answers were more than one litre with the more than sign.

The same as one litre and here in this column, those containers that have less than one litre with the less than sign here.

Pause the video to complete your task.

Resume once you're finished.

Now it's time to go through the answers.

In this container, the intervals go up in tens.

Each mark represents one.

This container holds up to 30 millilitres.

It is only full by 11 millilitres.

This container goes up in the same intervals of 10.

Each mark also represents one.

The capacity of this container is 40 millilitres.

It is full up to 28 millilitres.

And in the final container, the intervals are the same again, going up in tens.

Each mark represents one.

The capacity of this container is 70 millilitres, and the container is full by 55 millilitres.

Well done on a great lesson.

I hope you've enjoyed looking at capacity of containers and recognising what one litre looks like.

I hope to see you again soon.

Bye.