# Lesson video

In progress...

Hello.

My name is Ms. Jones, and I'm going to be doing maths with you today.

I'm feeling super excited and can't wait to solve some problems with you today.

Let's see what we're going to be doing.

In today's lesson, we're going to find the massive objects using non-standard units.

We'll start off by thinking about what non-standard units of measure might look like.

And we're going to use them later on to compare masses, thinking about which one is heavier and which one is lighter.

And finally, you've got an end of lesson quiz.

You'll need a pencil and a piece of paper.

You might want to use some household objects today to do some estimating and measuring of your own.

If you haven't got them, don't worry, because I'm going to be sharing with you some images that might help you.

If you haven't got what you need, go and gather your objects, and then come back to the video.

All right? Hopefully, you've got what you need, so let's get started.

Here, I've got some non-standard units of measure.

I've got some marbles.

Now, you might not have marbles at home, but you could do this using any objects that are the same size and weight.

So I've got marbles which are all the same.

So I know they are the same size and weight.

You could use paster or coins or small toys that are all the same size.

If you have any.

Now, I'm using these to help me estimate the mass of this book.

I estimate that the mass of this book will be the same as one, two, three, four, five marbles.

I can say that the mass of the book is about five marbles, or it weighs approximately five marbles.

Can you have a go at making a full sentence about the book and the marbles.

Well done, some great sentences there.

I've got some balance scales here.

Let's have a little explore about what's happening in each picture.

We have an item here that we're trying to measure the mass of, seeing how much it weighs.

We have a cuboid shape.

Now, we can see that when we use one marble, the cuboid is heavier.

The cuboid weighs more than one marble.

We can see we've added some more marbles here.

The cuboid is still a little bit lower on the balance scales.

We could say that the cuboid weighs more than four marbles.

But when we add one more marble, the balance is equal here.

They're the same height.

The scales are balanced.

So I can say that the cuboid weighs about the same as one, two, three, four, five marbles.

The cuboid is approximately five marbles.

Or the cuboid weighs approximately the same as five marbles.

Can you have a go at making your own sentence about the cuboid and the marbles? Pause the video now to do so.

Okay, let's move on.

Here, we've got a teddy bear and some cubes.

The scales are balanced.

I know that, because they are approximately the same height, and here I can see my indicator is in the middle.

Okay.

Let's have a look of how we could say this using a full sentence.

I could say the teddy bear has the same mass as approximately five cubes.

Or I could say the Teddy bear weighs about the same as five cubes.

Post the video now and see if you can make a full sentence using some keywords such as about and approximately and mass.

Here, we've got a sentence stem to help us make a full sentence.

But I'm going to also show you it out loud too.

Here we have a cap.

The cap, we can see has the same mass as about one, two, three cubes.

Let's have a look at our sentence.

I estimate that the cap will be about the same as____blocks.

Okay, so we need to fill in our missing word.

How many blocks were there? One, two, three.

I estimate that the cap will be about the same as three blocks.

Well done.

Let's see another one.

Here, we've got a bus and we've got one, two, three, four, five, six blocks here of bricks.

I think they're toy bricks.

We can see our scales is balanced.

I know that, because they're approximately the same height, and my indicator is in the middle here.

What sentence could we say about this one? Well, I could say that the toy bus is about the same mass as one, two, three, four, five, six bricks.

Can you have a go at saying a sentence? Okay, let's have a look at another.

Now, remember that the toy bus with six bricks.

Let's see how many bricks another object is.

Here, we've got a toy truck.

This one is one, two, three, four, five bricks.

And we've got our sentence stem.

I estimate that the truck will be about the same as five bricks.

Well done.

That's looking at two or more things and seeing which one is heavier, which one is lighter.

Do you remember our bus from before, which was about the same as six bricks? Which was heavier? The bus or this truck? We can say that this truck is lighter.

The truck is about the same mass as five bricks.

The bus was six bricks.

Let's have a look at what you need to do today.

First of all, you need to match the scales to the correct statement.

We've got an astronaut.

I think it's a toy astronaut, rather than a real astronaut.

I think we've got the theme here, 'cause we've got a rocket and an alien.

Okay.

We also have some sticks as our non-standard unit of measure.

So I can see that the astronaut is about the same as one, two, three, four, five sticks.

The rocket is about the same as one, two, three, four, five, six.

And the alien is about the same as one, two, three, four sticks.

Now I know that, let's look at the statements.

We've got three statements.

It weighs more than five sticks.

It weighs the same as five sticks, and it weighs less than five sticks.

Once you've done that, you can move on to part two.

This time, you need to use these key words, more and less.

You need to compare the different items. For example, the rocket weighs ____ than the spaceman.

Does it weigh more or less? Look back at your images and count the number of sticks to check.

In this one, you need to compare the alien and the rocket.

And in the final one, the spaceman and the alien.

Okay.

It's time to pause the video and go and have a look, and complete your tasks.

When you're done, press play again, and we'll look at the answers together.

Let's have a look at the answers.

Okay, so this first one, we know that spaceman weighs the same as five sticks.

The alien weighs less than five sticks.

I know that, because we can see it weighs the same as four sticks.

And finally, the rocket weighs more than five sticks.

I know that, because when I counted, I could see that it weighed about the same as one, two, three, four, five, six sticks, which is more than five.

Okay, let's look at part two.

We know that the spaceman weighed more than the alien.

If you wanted to, you could add an explanation.

I know that, because the spaceman weighed five and the alien weighed four sticks.

For your next statement, the rocket weighs more than the spaceman.

And for your final one, the alien weighs less than the rocket.

Hopefully, you checked back using your images and counted the sticks.

I've had a lot of fun today, and I hope you did too.

Hopefully, you might want to use some of this knowledge to have a go at some estimating and weighing of your own, using your non-standard units of measure.

If you want to, you can ask your parents or carer to share your work with Oak National.

Before you go, make sure you have a go at our end of lesson multiple choice quiz to see how much you've learnt.

Thank you, hope you had a great time today.