# Lesson video

In progress...

Five, four, three, two, one.

Hello, everyone.

It's lovely to see you.

Reggie just wanted to show you how good he was at clappin'.

Thanks, Reggie, I think everybody's seen now.

We were just playing a little game a little while ago.

It's called name the object.

Do you want to see how it goes? Let's take a look.

So there are 20 boxes in this grid with numbers up to 20.

There are some objects on different numbers in the grid.

Reggie was giving me a clue about where each object is.

And I had to say what the object was.

Shall we see how it goes? Let's see if Reggie will give me a clue.

Okay.

Reggie said the object that he's thinking about is on the number that is one more than nine.

One more than nine.

Do you know what the object is? Shout the answer out to the screen if you do.

Oh, Reggie, I can hear people shouting out the answer! Let's take a look.

One, two, three, four, five, six, seven, eight, nine boxes, and so here it must be.

The number that is one more than nine.

We could do one jump forward with our finger, is 10.

The object is a lady bird.

The lady bird was on the number that is one more than nine.

And that is 10.

Great, Reggie! I tell you what, would you like to play too? I can hear some children saying they'd like to play.

Reggie wants to give the clue.

Let's see what it is.

Okay.

Let's play.

Reggie says the object that he's thinking of is on the number that is one more than 11.

One more than 11.

What's the object? Shout it out to the screen if you know what it is.

Oh, I can hear some children shouting out the answer, Reggie.

Shall we check? Let's see if we can find number 11.

Here we are.

Let's do one jump forward for one more than 11.

And there it is.

The yellow block.

So number 12.

One more than 11 is 12.

And it's the yellow block.

Well done, everyone.

That was great.

Oh, Reggie says, do you want to do one more? We could try and do one more.

Let's have a look.

Reggie says that this object is on the number that is one less than 15.

One less than 15.

What's the object? Shout the answer out when you know.

Great, I can hear lots of you shouting out the answer! Let's take a look.

So first we need to find number 15.

Where is it? Oh, I think we're going to get some help.

There we are, Reggie is pointing to it, 15.

So to do one less than 15, we have to do one jump backwards.

And here we have it.

One less than 15 is 14 and the object, oh I think Reggie's going to hold it, is a pink pompom.

A pink pompom.

Well done, everybody.

Give yourselves two claps for joining in.

That's great! So for today's learning, we're going to be learning about one more and one less with numbers up to 20.

Here are the objects that you're going to need for today's learning.

You will need 20 cubes for counting.

Now, if you don't have 20 cubes, that's fine.

You can use blocks or you can use any other small objects that you have at home.

You will also need a number line.

Looks a little bit like this.

Goes all the way up to 20.

And we will also need some number cards all the way up to 20.

And a two pence coin.

Press pause now to go and get those things and I'll see you in a bit when you're ready.

Welcome back, everyone.

Now that you've got your objects, you are ready for today's learning.

Let's take a look.

So the first thing we need to do is to put our number cards in a pile.

I am going put them upside down, just like this.

Let's put some of them upside down.

I'm going to choose one.

Which one should I choose? Let's see.

I'm going to choose this one.

There we are.

Can you read the number for me? What does it say? What is the number? Five, the number is five.

Now I'm going to make a tower of five cubes.

Let's count, can you count with me? Here's one.

Two.

Three.

Four.

Five.

Let's check.

One, two, three, four, five.

Five cubes.

Now, here's how the game goes.

I'm going to flip my coin.

If it lands on tails I'm going to take one away for one less.

There we are.

Tails for one less, heads for one more.

Oh, I think Reggie wants to flip it.

I'm going to give it to Reggie.

Reggie's got it in his hands, right there.

Reggie's going to flip it.

Let's see where it lands.

Oh, there we are.

Bring it up to the screen so everyone can see.

So there we are, I had five cubes.

Now I need to add one more.

One more.

How many cubes do I have now? Shout the answer out to the screen if you know.

I can hear a lot of you shouting out the answer.

Let's count them together.

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

One more than five is six.

We could use our number line to help us with that.

Let's take a look.

Here we are.

Let's find number five.

Five.

Let's do one jump forward.

One more than five is, six.

One more than five is six.

Great counting, everyone.

Give yourselves two pats on the back for joining in.

Now, let's see if we can choose a different number.

I'm going to put my number cards back and then I'm going to choose a different number.

Oh, which one should I choose? Let's go with this one.

What's the number? Shout the answer out to the screen if you know.

11, now let's make a tower with 11 cubes.

You can help me count.

Are you ready? One, two, three, four, five, six, seven, eight, nine, 10, 11.

What a tall tower, 11 cubes.

Now I'm going to flip the coin this time.

I wonder what it's going to land on.

Will it land on heads or will it land on tails? Let's see.

And it's landed on tails.

Tails means I need to take away one.

I need to do one less.

So let's look at our tower.

One less.

That means I need to take one away.

Let's take away the top one.

Now I've taken one away.

How many cubes do you think I've got left? Shout the answer out to the screen if you know.

Great, I can hear a lot of you shouting out the answer.

Let's count them together.

One, two, three, four, five, six, seven, eight, nine, 10.

One less than 11 is 10.

Can you say that? One less than 11 is 10.

And we can use our number line to help us work that answer out.

Let's find number 11.

We're getting closer.

And there we are.

So to do one less, we do one jump backwards.

One less than 11 is 10.

One less than 11 is 10.

Let's see if you can put your number cards in front of you, just like I did.

And then you can choose a number card and then see if you can build a tower matching that same number.

Then, flip your 2p coin just like I did and see if it lands on heads or tails.

Then find out if you need to add one more cube to your tower, or to your objects, or one less.

Press pause now to go and do that.

And I'll see you when you've finished.

Welcome back, everyone.

Did you make your tower? What did you have to do? Did you have to add one more or did you have to take away one to make one less? Practise doing that some more with your objects.