Lesson video

Welcome to your math lesson with me, Mrs. Harris.

We're going to have lots of fun today as we look at comparing similar objects that are equal in size.

This is a really busy lesson for you.

You're going to be doing some learning with me, but really, I think the best way for you to learn about similar objects are equal in size is for you to play.

So let's find out what you're going to need today.

Well, I'd like you to have lots and lots of different containers.

I've got some buckets, some little DD cups.

I've got some drinking cups.

Now you can find or ever containers you can, around wherever you are.

Just make sure your parent or carer said, you can use them.

And then, the other thing I'd like you to have is some water, or maybe even some sand.

Now you probably want to pause the video and go and get them, or at least get them ready somewhere you can use them later.

So pause the video, go and get all set up.

And then, come back to me.

I thought the best place to play with some sand or water would be outside.

So I'm outside right now.

You might hear some pigeons or some other birds while we're doing the lesson.

So I said we would be comparing similar objects that are equal in size.

First one I'm going to use is this pan here.

We're going to fill it up with some water.

this is not a good choice.

Look at all them holes.

Okay.

Don't worry.

Two more saucepans here.

They're similar, aren't they? They're both pans.

But I'd like to know if they're equal in size and I'll know if they're equal in size, because if I fill one up with water, right to the top and then pour that water into my other one, it will fill it right up.

Oh, it's not filled right up.

This pan held more water than this pan.

They are not equal in size.

Equal means the same.

They are not equal in size.

All right.

I found some buckets to swap.

I'd usually use them in the sand pit, but I thought I'd use them in water today.

So I've got two buckets here.

They're similar.

They're both buckets.

One's yellow, one's blue, but they're both buckets.

Now I'm going to see if these are equal in size.

Can you remember what equal meant? It meant the same as.

So I'm going to fill my blue bucket up with water, right to the top, that's definitely right to the top, starting to spill over.

And then I'm going to pour that water into my yellow buckets.

And if they're equal in size, it will fill our yellow buckets up.

Exactly.

With none leftover and no gap in the top of my yellow bucket.

Do you think they're equal in size? Can you make a prediction? Okay.

Let's find out.

Oh, it's full, it's full, it's full.

But look, there was more water in my blue bucket.

These are not equal in size.

I could check it, while using yellow buckets as well.

I'm filling that one right up to the top.

I fill it right up to the top, and then pour it into my blue bucket.

There will be no space at the top.

We already know.

We can predict from what we just saw, that there will be a gap in the top because these buckets, although they're similar, they are not equal in size.

Oh, there's lots of room in my bucket.

In my blue bucket.

They're definitely not equal in size.

But I've got another bucket.

How do I think these ones? They're similar.

They're both buckets.

They're different colours.

But I think they're similar.

I think they're equal in size.

Let's find out.

Let's fill the yellow bucket up.

Okay.

Right to the top.

And remember, if they're equal in size, there will be no gap in the top of this bucket and no water pouring over the top.

So let's see.

They are.

They are equal in size.

I enjoyed finding out if my similar containers were the same in size, equal in size or unequal, but now it's your turn.

I bet you've been waiting for your turn.

And I would like you to compare your containers.

Make sure you remember to say if they're equal in size or not, maybe you can even predict.

That means, say before you find out if you think they're going to be equal or unequal in size.

If you're playing with water, maybe you could do it outside.

You could do it at the kitchen sink or maybe even in the bath.

Wherever you do it, just make sure you do say, if your objects are equal or unequal.

So pause the video now, have a go and then come back to me.

I hope you enjoyed playing with your water or your sand.

In fact, I'm still a bit soggy from playing with mine, but it didn't stop me enjoying it.

I wonder if you found any objects, similar objects that were equal in size.

Did you find any that weren't equal in size? That were unequal? Were you able to make a prediction about whether they were equal or unequal? I hope you enjoyed your lesson with me, Mrs. Harris.

I know I enjoyed it.

Maybe you'd like to share some of your work with me and everybody at Oak National and you can do that on social media.

I'll be looking out for it.

Bye.