Lesson video

Hello friends, it's Miss.

Molnar here and we are going to do some a super fun math learning today.

And I've brought along my favourite top partner that can help me talk through some tricky math questions.

It's Harold the hedgehog everyone.

Say hi Harold.

All right, let's see what you're going to need to get ready for this lesson, we're going to be looking at exploring the characteristics of some 3D shapes.

So you're going to need to go gather a few things, so you can help Harold today because Harold has an exciting project, a building project and we're hoping that you are a really good builder.

Are you a good builder? Oh, I'm sure you are, because we're going to need your expertise to ensure that we pick the right shapes or the right materials for these structures today.

All right, let's see what we need for this lesson.

So, for today's lesson, you're going to need some kind of blocks.

So maybe you've got some blocks that you play with at home, but if you don't have any blocks or any 3D shapes, you can actually grab some real life 3D shapes at home that will help you today.

So I've got a few things to help me, like I've got some fruit because that makes a sphere.

I've got some boxes to show that they're cuboids.

So take a minute, make sure you ask a parent or carer and see what blocks or real life 3D objects you can gather that's going to help you do some building today.

If you can't find any of these items, don't worry in the downloadable resources you can print out some pictures and some 3D shapes.

And that will help you as well to do some of your building or picture making.

Alright, pause the video now, go grab what you need, and we'll get started.

All right see, you might have already learned some information about some of these 3D shapes already.

So we want to see what you might know, all right, so I'm going to ask a few questions.

And let's see if you can point to the shape that might have some of these features and Harold going to have a go at guessing as well.

All right, do any of the shapes on this screen have a curved surface, a curved surface? Take a look, do any of the shapes on the screen have a curved surface? If you think there is one can you point to one now, Harold is going to whisper to me one that he sees.

Alright, so Harold says that the red shape the one that looks like a ball, he said that definitely has a curved surface.

Did you see that one as well? Now is that the only shape on the screen now with a curved surface? No, that's right you might have pointed to another shape on the screen.

Can you point to the other shapes on the screen that also might have a curved surface.

Well done, if you pointed to the cone that kind of looks like an upside down ice cream cone.

Or if you pointed to the cylinder, which sort of looks like my water bottle, then you are so right because they both have curved surfaces on those shapes, way to go.

Now let's think of one more question, Harold going to think of a question to ask us to see what we already know about these 3D shapes.

Okay, he's having a think, all right he's going to whisper into my ear.

Okay, Harold says, are there any shapes on the screen that have more than one vertices, more than one vertices? Now, if you don't know what vertices means it means, it's kind of looks like a point, or sometimes a 3D shape will come to a corner and will have a point.

Do you see any shapes that have more than one of these vertices have a look, can you point to them? All right, well if you pointed to the two blue shapes in the middle, the cube and the cuboid, kind of like my pasta box here, then you're so right.

They've got more than one point or more than one vertices, way to go well done everyone.

So, like I said, later on, we might be doing some building in this lesson.

So we need to think a little bit more about the features of some of these shapes.

Now, we would like to know what do you think.

Which of these shapes would be best for rolling, and why do you think that? So if you were to take any of these shapes and roll them maybe across the floor or table, which ones would be the best for rolling and why? You can pause the video for a second if you want to have a think.

Okay, let's see what Harold has to say and maybe it's what you said as well.

All right so, Harold said shapes that have no vertices are the best shapes to roll.

Why would that be, have a think right now? So I've got this orange here, it's got no vertices or no points at a corner.

Why would this be a good shape to roll? Because it's got no vertices, what would happen if it had a vert see at the top? That's right, if shapes have vertices, it has more of those straight sharp edges, and it would be much more difficult to roll that shape.

Whereas if a shape has a curve on it, then it will be much easier to roll it across the floor.

Are there any other shapes on the screen other than the sphere, that would be good for rolling.

Can you point to it? If you pointed to a cylinder well done, Kind of like my water bottle here, if I was going to roll it across the floor, it would be a little bit easier for rolling.

Alright, we've got another question for you to think about now, we know now which shapes would be better for rolling.

But now we want to think about what shapes would be good for stacking.

So stacking means, putting one shape on top of the other maybe to make a tower.

So have a think right now, which of the shapes on the screen would be best for stacking? You can pause the video if you want to have an extra think.

So I went gathered quite a few items from my home that can represent my 3D shapes.

So I've got lots of cuboids with flat shape, with flat surfaces or flat faces.

Quite these ones here, I've got a sphere, I've got some cylinders and I've also got a cone.

Now, let's look and see what would happen if I tried to roll, a shape with a flat surface.

Let's see what would happen or a shape with vertices.

Alright, so I'm going to try and roll this box across my table, so let's go, let's see.

Oh, well, I didn't get very far did I? It's not very easy to roll is it? That's because this shape has too many flat surfaces or vertices, so it makes it trickier to just roll it smoothly.

Now, let's try some of those shapes we were talking about with curved surfaces or no vertices.

So let's see what would happen if I rolled my orange across the table, much smoother, isn't it? There's no tricky vertices to get in the way, great.

Now, like we said, there's some other curved ones that we have as well, we've got a cylinder with this tin can.

Let's see if that's a bit easier to roll across the table as well, much smoother, isn't it? Because it doesn't have the flat surfaces on the edge here, it doesn't have any vertices to get in the way.

Now with the cone, we can try rolling it, it does roll because that vertices is there Look how it spins around kind of in a circle, the vertices kind of stops it from moving, too far along.

All right, so we know that shapes with curved surfaces and no vertices are best for rolling.

Now, let's see when we try to stack some shapes, which one's the best for stacking? Now, Harold thinks that we should start off by stacking some of our shapes with curves.

So I'm going to start with my orange and then I'm going to put my cone on top and then I'm going to find another curve shape.

I'm going to try and put my Oh, goodness, ah, what happened? That's right, these shapes were not the best for stacking because they all have curved surfaces.

We said the best shapes for stacking are those with flat faces or flat surfaces.

So I'm going to have a go and find some of my flat surface shapes and I'm going to have a go at doing a bit of stacking.

Now this is going much better look at that and I can even put a cylinder up on the top because cylinders have a couple of flat faces on the top and the bottom.

And there we go, so that proves that we know shapes with flat surfaces are the best for stacking.

All right, it's time for us to do our talk task, Harold is going to chat us through it.

Harold! Harold! Oh, Harold, what are you doing? That hat is way too big for you, I think I know why Harold got this hat for us though, because Harold wants us to be builders for him.

He wants us to try and help him build a castle, but first he needs to make sure you listen to this lesson well.

So the first thing that he would like you to do in the talk task, is show us that you can build a wall.

So right now we want you to ask your parent or carer for some household items, or some blocks that you might have to help build Harold a wall for his castle.

So we want you to tell us out loud, which shapes you're going to use and why.

You could use some of the vocabulary below to help you describe.

Let's do, I say, you say to go through the vocab ready? Surface, flat, curved, vertices, stack, roll, well done.

So you might say, I'm going to use a shape with flat surfaces so I can stack them one on top of the other.

All right, pause the video and have a go, we can't wait to see what your wall looks like.

All right everyone, how did you get on with building the wall? Well, Harold and I think that you have passed the test and we think you are now a certified builder like us because you know how to choose the right shapes to make a strong and steady wall.

So if you're up to the main task now we've got a big project for you.

Are you up for it? Sorry, we can't hear you, are you up for it? Oh great, we're so glad we've got some great builders on board.

So, we would like you to make some different structures, or different buildings for Harold using 3D shapes.

So like I said earlier, you might already have some blocks at home that you could utilise.

And if not, you can ask your parent or carer for some household objects where you could make something like a castle, or a bridge, or a house.

We want them all to be made for Harold.

Now, if you don't have some of the household objects in order to make some of these structures, what you can do is in the downloadable resources, we've got some pictures of 3D shapes.

And what you could do is you could ask a parent or carer to help you cut out the shapes and you could paste and stick the shapes to build a castle or a bridge, or a house for Harold.

And then you could even draw a picture of Harold in the picture as well, so the choice is up to you.

All right that's it from us, we want you to have a go and we cannot wait to see what you come up with.

All right builders, ready, set, go.

What building did you end up making for Harold? Did you build a castle? Did you build a tower? Or maybe you even built a bridge? Wow, we would absolutely love it, if you took a photo of what you built and you sent it to your teacher.

They would just love to see what you've created, but even more we would really love to see and I know Harold would love to see what a great builder you've been.

So if you'd like you can ask a parent or carer to take a photo and share your learning with us.

On our social media @Oak and maybe you can tell us where Harold can find a hard hat in his size.

All right, until next time everyone.