Lesson video

Hello, my name's Ms. Robertson.

Today, we're going to be using our knowledge of numbers to 15.

We're going to be counting how many are in one group.

And then, we're going to think about sharing in two groups.

We're going to count afterwards to check and see if things are equal or if things are not equal.

For today's lesson, you will need 15 things that you can use to represent people.

These could be blocks like the ones I'm going to use, or you could use pasta, counters or cubes.

You'll also need five houses.

You could draw these on a piece of paper.

I'll give you a second now to pause the video and you can go and get these resources ready if you need.

I can see some people standing in a group.

They're in a circle on the page.

Can you have a go at counting and tell me how many you think are there? One, two.

I can see two people are standing in the group.

Can you point to the number two? Let's check.

There's the number two.

Next, we have some more people standing in a group.

This time we have two adults and two children.

Can you count to find out how many there are altogether in the group? There are one, two, three, four.

There are four people altogether standing in the group.

Can you point to the number four? Let's check.

Fantastic, there's the number four.

This time, you've got three numbness to choose from.

How many people can you see in the group? That's right, there's just one person.

Point to the number one.

Let's check.

There's the number one.

One more group to look at.

How many people can you see standing in the group? One, two, three.

I can see there are three people in the circle, three people in the group.

Can you point to the number three? There's the number three.

Let's have a quick look at those two groups.

There's one person in one of the groups and there are three people in the other group.

Are these groups equal or are they not equal? They are not equal.

If they were equal, they would have to have the same amount in each group.

Both groups would have to have the same total.

Instead, there's one in one group and three in the other group.

The group with three has more.

Now, we're going to have a go at sharing some people into some groups.

We have some houses to look at.

These are going to be our groups.

Two houses, means two groups.

Watch to see how I share my people into the groups.

Here, I have my two houses and I have some cubes to represent the people.

I'm going to start by just sharing six people into my different houses.

One, two, three, four, five, six.

There are my six cubes to represent my people.

I'm going to start by sharing two into the first house and putting the rest in the other house.

I've got two in the first group and four in the second.

Altogether, there are still six people.

But these groups are not equal, because this group only has two, and this group has more, this group has four people.

Let me try again.

This time, I'm going to try and do my one for you, one for your method.

One for you, one for you, one for you, one for you, one for you, one for you.

This time, I've got three people in this group and three people in this group.

These groups are equal because they have the same amount in them.

Let me try one more time.

The groups don't have to be equal.

So I think I'm going to just put one in this first house and five in the other house.

One and five, these groups are not equal, they are not the same size.

But altogether, there are still six people.

One in this group and five in this group, I'm going to try sharing one more time.

But this time I'm going to ask you to try and tell me about the houses.

I'm going to put one, two, three here, and I'm going to put the others here.

I have four in this house and two in this house.

Can you tell me, do you think these houses are equal or are they not equal? They are not equal.

They do not have the same amount.

This time, there are five houses.

That means there are five groups.

We're going to share some people into the houses.

They don't have to be equal.

They can have different amounts in each house.

Let's see how we can share them in some different ways.

This time I have my five houses and these are going to be my five groups.

At the top, I have all of my cubes that are going to represent the people moving into the houses.

I've put them into twos to make them easier to count.

two, four, six, eight, 10, 12, 14, and one more makes 15.

14 and one more is 15.

If you would like to, you can get your 15 cubes and your five houses and you can try sharing with me.

I'm going to share them systematically.

That means I'm going to put one for you, one for you, one for you until I've run out.

Can you join in when I'm saying one for you? Ready? One for you, one for you, one for you, one for you, one for you, one for you, one for you, one for you, one for you, one for you, one for you, one for you, one for you, one for you, and one for you.

This house has three, this house has three, this house has three, this house has three, and this house has three.

They are all equal.

They all have the same amount of people in them.

I shared them out systematically.

Our groups don't always have to be equal.

Let's see if there's a different way that we can share these people out.

This time, I'm going to have a really big family move in here.

Two, four, six, eight.

Next door, I'm just going to put one person.

In the next house, I'm going to put three people.

Then in the next house, I'm going to put three more people.

My total is still 15.

I haven't taken any people away or added any more people, but I've shared them out into the five houses.

This house has eight, this house has one, this house has three, this house has three, and this house has zero, no people living in that house.

That's still one of our groups.

This time, we're going to try a question together.

If you've got your cubes in front of you already, you could use them to help you, or you can watch mine.

I'm going to try and answer the question.

This time, we're going share these people, but we have a constraint to follow, a rule.

We are only allowed to put one person in each house.

So I can't put all five in this house and zero in the rest.

I have to make sure that I put one person in each house.

Let's see if I can do it.

One person here, one person here, one person here, one person here, and one person there.

I have five people and five groups.

I've got five groups of one.

These houses are equal.

They all have the same amount in them.

They all have one person in each group.

Now it's your turn.

You should have your five houses, which means your five groups.

And you should have your 14 things.

You're going to share those 14 things into the houses and see what different ways you can do that.

But there's a constraint, a rule that we have to follow.

Every house has to have one, two or three people.

You can't have less than one and you can't have more than three.

See what different combinations you can come up with.

Pause the video now to complete your task.

When you're finished, press Play.

Right, let's check.

There are lots of different ways that you could have shared the 14 people into the five houses.

I'm going to show you how I did mine.

Because there are lots of different ways that you could have done this, if yours is different to mine, see if you can ask an adult to help you check to see if it's right.

So here I have my 14 people and I have the constraint that I have to put one, two or three people in each house.

I'm going to first see if I can fit three in each house.

Three, three, three, three.

I've only got two left, but my constraint did say I could put two in a house.

So I've got three, three, three, three, and two in the last house.

I've had fun today, I hope you have too.

You've done some fantastic learning.

Why not share it with us? If you'd like to, please ask your parent or carer to share your work on Twitter, by tagging @OakNational and using the hashtag #LearnwithOak.

We'd love to see what you've been doing.

That's all for today, see you tomorrow.