Lesson video

Hello, everybody.

My name is Mrs. Johnson.

I'm really excited to be here today to help you with some of your maths learning.

I hope that you are ready to work hard and have lots of fun.

Let's have a look at what we're going to be learning about today.

Today's lesson is called "Explore, Recognise and Compare Three More 3D Shapes" and it comes from the unit, "Recognise, Compose, Decompose, and Manipulate 2D and 3D shapes." By the end of this lesson, you are going to be able to recognise, name, and compare three more 3D shapes.

Have a think about which 3D shapes you know already, but don't worry if you can't remember, because I am going to help you and we are going to work together.

There are four key words that you are going to use in this lesson to help you with your learning.

Let's go through each one and practise saying it.

I will say them first, and then I would like you to say them afterwards.

My turn, similar.

Your turn.

My turn, cuboid.

Your turn.

My turn, cube.

Your turn.

My turn, pyramid.

Your turn.

Well done.

Listen out for those words in this lesson today because they will really help you to learn more about 3D shapes.

There are going to be two parts to this lesson.

To begin with, you are going to be matching shapes and objects together, and then later on you're going to be comparing shapes.

Let's start by thinking about matching shapes and objects together.

There are going to be two friends helping us in this lesson.

Sophia and Jun are going to help you today.

Look out for them throughout the lesson, because they always have something that is helpful for you to listen to.

Sophia has been on a little walk around her house, and she's made a collection of some objects.

Have a look at those objects and think about what you notice.

Sophia says, especially, to look carefully at the shapes that you can see.

Let's have a think about those shapes together.

I can see some shapes that look tall.

I can see some shapes that look pointy.

I can see some shapes that look flat.

What can you see? Can you see any shapes that are similar? Sophia's reminding us that similar means alike.

Can you see two shapes that are like each other? Let's have a look at shapes being similar a little bit more.

Sophia has chosen these two shapes, and she says that these two are similar.

Why might Sophia have chosen these two objects as similar shapes? She says, "They are both flat on the top and the bottom.

They are both shaped like a box." Maybe you could think of some other reasons too, why these two shapes are similar.

Now Sophia has chosen two more shapes that she says are similar.

Why might she have chosen these two as similar shapes? Let's see what she says this time.

Sophia says, "They can both stand.

They are both tall and wide." Those are her reasons for why these two shapes are similar.

I wonder if you can find similar shapes.

Let's have a look and see if you can do this.

Look carefully at the object in the photo.

Which object is a similar shape to the one in the photo? Is it a, or b, or c? The similar shape is a.

Well done if you said a.

Which object is a similar shape to this? Do you think it's a, b or c? It is c.

Well done if you said that.

And I have one more for you to try.

Which object is a similar shape to this? a, b, or c? This time it is c.

Well done.

All the shapes that we are learning about today are 3D shapes.

3D stands for three dimensional.

That means that there are three different ways that you can measure 3D shape.

You can measure the height, and you can measure the width, and you can measure the depth.

Three different ways to measure a shape.

That is why these shapes are called 3D shapes.

Sophia has a nice way of remembering what a 3D shape is too that you might find helpful.

Sophia says, "If I hold a 3D shape between my hands, I can feel it because it is not flat." Maybe later you could go and get a 3D shape and hold it in between your hands and see what it feels like.

You can describe what a 3D shape looks like using words that you probably use all the time.

Words like tall, thin, short, squashed, wide, or pointy.

Let's check that you can use those words.

Look around you.

Can you find some objects that you could use those words to describe? Off you go.

Well done, everybody.

I wonder what you found.

I was looking around in my room, and I could see my wide computer screen, and I could also see a pointy pencil on my desk.

We've just practised describing what a 3D shape looks like.

You can also describe what a 3D shape can do.

Again, using words that you probably use all the time.

Words like stand, roll, stack and slide.

Let's check that you can use those words.

Look around you.

Can you see any shapes or objects that might stand, roll, stack or slide? Off you go.

Well done.

I wonder what you found this time.

Maybe you found some boxes that can stack on top of each other, or maybe you found a ball that can roll.

I found a pencil on my desk that can roll.

You have just shown that you know how to use words to describe what a 3D shape looks like and what it can do.

Now we're going to learn some new mathematical vocabulary to be able to describe 3D shapes.

We're going to learn the names of some 3D shapes, and our first word that we are going to learn is cuboid.

Let's practise saying that word again.

My turn, cuboid.

Your turn.

Well done.

Look at all of these cuboids.

I wonder what you notice about them.

Let's have a think about it together.

I can see that the cuboid is shaped like a box, and I can see that a cuboid can stand and stack.

I can see in the picture that these boxes are standing up like this, and I can imagine that if I picked up some of those boxes, I could stack them on top of each other and build a bit of a tower.

Can you find four cuboids? Look at all of the shapes on the screen.

Which ones are cuboids? Pause the video if you need a little bit longer.

Let's see where those four cuboids are.

Here we go.

One, two, three, and four.

There they are.

Well done if you spotted all of those cuboids.

Good job.

Now that you know cuboid, you're going to learn another new shape name.

This time you're going to learn the word cube.

That sounds really similar, so let's just practise saying that one again.

My turn, cube.

Your turn.

Well done.

Have a look at all of these cubes.

What do you notice about them? Let's have a think together.

What might be special about a cube? I can see that a cube is also shaped like a box, the same as a cuboid is shaped like a box.

I wonder what else is special about a cube.

A cube can stand and stack.

That's the same as a cuboid too.

Is there anything else special about a cube? I wonder what you've noticed.

I've noticed that a cube has square-shaped faces.

All the faces on a cube are the same shape.

Let's have a look at cubes and cuboids in a little bit more detail to make sure that we understand how they are different.

A cube is a special type of cuboid.

All its faces are the same size.

So if we look at this picture, I can see this is a cube because all the faces are the same.

There isn't one that's bigger or smaller or wider or taller.

All the faces are the same.

If I look at this shape, I can see that this face is smaller and this face is bigger.

That means that this shape cannot be a cube.

This is a cuboid, because the faces are not all the same.

Can you use that knowledge of cubes to see if you can find four cubes in these pictures? Pause the video if you would like a little bit longer.

Off you go.

Let's see where those cubes are.

There is one, two, three, and four.

There are four cubes.

Well done if you found all of those.

Now that you know cuboid and cube, you have one more shape name to learn.

This one is pyramid.

Let's just practise saying that one more time.

My turn, pyramid.

Your turn.

Well done.

Have a look at all of these pyramids.

What do you notice about them? Let's have a think about this together, and look really carefully at the pictures.

I can see that a pyramid always has some triangle-shaped faces.

I can see triangles on all of these pyramids.

I can also see that a pyramid has one vertex at one end and lots of vertices at the other end, and Jun is really helping us out here to remind us that a vertex means a point.

Look carefully at these pyramids.

Can you see that there is one point, one vertex, at one end, and then lots of points, or lots of vertices, at the other end? I can see something else that's special about these pyramids too.

I can see that a pyramid can have one face that is a different shape, not a triangle.

Wonder if you can see that too.

Let's think about these special things about pyramids one more time before you go to find some pyramids.

Pyramids have one vertex at one end, and lots of vertices at the other end.

They have some triangle faces, and they can have one face that is not a triangle.

Can you use that knowledge to find four pyramids? Have a look at all of these shapes.

Where are the four pyramids? Pause the video if you need a little bit longer to find them.

Let's have a look.

Here are the pyramids.

There is one, two, three, and four.

There are the four pyramids.

Well done if you found all of those.

Good job.

Now let's see if you can remember all three shape names.

There is one picture of each shape that you have learnt today.

Have a little think and see if you can remember them, then I'm going to give you a clue.

Here is the clue.

There are the three names, but they are not in the right order.

Can you match those names to the correct shapes? Let's see if you've matched them correctly.

You should have said the first shape is a cube, the second shape is a cuboid, and the third shape is a pyramid.

Good job if you've remembered all three of those new shapes.

Well done.

Now you are going to go and practise naming the 3D shapes that we have just learned by going to play a card game.

I would like you to put all the cards out in front of you and then pick up one card and look at it carefully.

Then, as quickly as you can, you have to find the other three cards that match the card in your hand, and you make a set of four.

Once you've matched up all your cards, I would like you to look around you and see if you can see any objects that are the same shape as the shape on your card.

Are you ready to go and play the game? Off you go.

Well done for thinking so carefully about those shape names.

That was a really fun game, wasn't it? This is how you might have matched your cards up.

These four cards belong together because they all show the 3D shape cube.

Once you'd matched all your cards, I wanted you to look around you and see if you could see any objects that matched the shape on your card.

Sophia was really good at looking around and finding objects to match her shapes.

She said, "I can see a book.

That is a cuboid shape." Jun was really good at looking around too.

He said, "I can see a dice.

That is a cube shape." I wonder what objects you found.

Now you are going to move on to the second part of your learning today.

You are going to learn how to compare shapes.

Have a look at all of the shapes in this picture.

I wonder how you could describe them.

Sophia wonders what shapes they are.

I think you might be able to remember what shapes they are.

What do you think? Of course you can, well done.

These are all cubes.

Do you think that all of these cubes look the same? No, you don't.

You're right.

Some of them are bigger, some of them are smaller, some of them are different colours.

Well done for noticing that they are not all the same.

Sophia has chosen two cubes to look at, and she's having a think about how these cubes could be the same or different, and Sophia has noticed that one cube is bigger, one cube is smaller, and they both have square-shaped faces.

Let's see if you can find out which cube Sophia has chosen this time.

Sophia says, "My cube is the biggest cube." Do you think Sophia chose a, b, or c? Sophia chose b.

Well done if you said that.

Now let's have a look carefully at all of these shapes.

Jun is thinking about these shapes.

He wants to know how he could describe them, and he wonders what shape they are.

I think you can help him out here.

I think you know what shape they are, don't you? Well done.

These are all pyramids.

Do you think that all the pyramids look the same? No, I don't either.

Let's have a closer look at some of these pyramids.

We know a pyramid always has some triangle-shaped faces.

Can you see the triangles on all of those pyramids? Good job.

We also know a pyramid has one face that might not be a triangle.

So, we can see here on these pyramids, there is a base, there is the base, and there is the base.

All pyramids have a base.

The base can be a different shape.

If you look carefully at these three pyramids, you can see that the base is different, but they are all pyramids because they all have triangle faces that meet in a vertex, or a point.

Now you know a little bit more about pyramids.

Let's see what Jun has been looking at with his pyramids.

Jun has chosen two pyramids to look at, and he's thinking about how they are similar and how they are different, and he has noticed that one pyramid is taller and thinner.

One pyramid is shorter and wider.

They both have triangle-shaped faces.

See if you can look carefully at some pyramids like Jun did, and see if you can work out which pyramid has Jun chosen this time.

He says, "My pyramid looks short and squashed." Do you think he is talking about a, b or c? He is talking about pyramid a.

Well done if you've said that.

Now you are going to go and have some practise at describing 3D shapes by playing another card game.

This time, the card game is a little bit different, so listen carefully so that you understand how to play this game.

First, you choose one grey card.

You have a look at your grey card, and look carefully at the shape that is on it.

Then, you need to choose three cards to go with your grey card.

The first one has to be a shape that is the same.

The second card is a shape that is similar, but not the same, and the third card is a shape that is nothing like the shape on your card.

Once you've chosen your three cards, then you tell a partner why you chose each card.

You could ask an adult if they have any 3D shapes or objects that you could use, then you can play this game with real shapes or objects instead of cards.

Are you ready to go and play the game? Off you go.

Wow, everybody.

That game was lots of fun.

It made you think really carefully about the shapes you were choosing, and you did some really good thinking about your 3D shapes.

Well done.

Let's have a look at how Sophia played this game.

First, she chose this card.

She knew that this was a cube.

These are the cards that she chose to put with it.

First, she chose this one, and she said, "I chose this card because they both show the same shape." They are both cubes.

Then she chose this shape, and Sophia says, "This one is a bit like a cube but the sides are not straight." For her third card, Sophia chose this one, and she said, "This is nothing like a cube because it is tall and thin and it has no square faces." I wonder how you decided to put your cards together.

Did you explain your reasons to your partner? Well done for thinking so carefully about 3D shapes.

Now that you are at the end of the lesson, you have learnt that 3D shapes are shapes that are not flat.

You know if you hold a 3D shape in your hands, you will be able to feel it.

You have found out that we see 3D shapes all around us.

You have learnt the names of three different shapes today.

You can name a cuboid, a cube and a pyramid.

You can say their names, and you can say how the shapes are similar and different to each other, using words like taller, wider, smaller, thinner, and squashed.

You have done some excellent thinking and learning about 3D shapes today, and I think you have all done really well.

Well done, everybody.

I hope that I will see you all again soon for some more maths lessons.

Bye.