# Lesson video

In progress...

Hello everybody, it's Miss Charlton here and my wonderful talk partner Hedwig all ready for some exciting maths.

Should we find out what we're going to be doing? Now today, we are starting a brand new unit, it's going to be all about numbers to 20.

And today we're going to learn to add by counting on using a number line.

We're going to use some first, then and now stories to describe addition, then we're going to show addition on a number track and a number line, then you'll do your independent task and then an end of lesson quiz.

Today you're going to need a pencil and some paper.

We start off with a brain teaser to get us all warmed up, I need my brain switching on.

We've got here some number bonds, but the problem is, that some of the wholes and some of the parts are missing.

What you need to do is see if you can figure out what the missing parts or the whole is.

Pause the screen now, have a go and then come back and we'll check together.

How did everybody get on, shall we go through them? So the first number bond is the whole is seven and the parts are zero and seven.

Zero plus seven is equal to seven.

Then the whole is seven, the parts are one and six.

One plus six is equal to seven.

The whole is seven, the parts of six and one.

Did you see what happened there? The parts are still the same, but we can swap them around to show the addition equation in a different way.

One plus six is equal to seven and six plus one is equal to seven.

Then the whole is seven, the parts are four and three.

Four plus three is equal to seven.

Then the whole is seven, the parts are five and two.

And then the whole is seven, the parts are two and five.

Oh, look, it's that trick again! Five plus two is equal to seven.

Two plus five is equal to seven.

Let's go through our star words ready for today's lesson.

Get your hands up, we're going to punch them out.

Hands up, star words.

First, then, now.

Those are the words we're going to use when we create some stories of addition.

Here we go with our first story.

Oh, first, there were 11 children sitting on the carpet.

Then, two more children came and sat down.

How many children are there now? Look, they're my star words.

First, then, now.

First they were 11 children, then two more came, how many children are there now? Let's see if we can figure out how to work out this word problem.

Let's start off by using a number track, this will help us see the numbers increasing each time.

So first there were 11 children on the carpet and can you see that I've put a dot on the number 11 there, to start us off? Then two more children came, if two more children came it means the numbers must be increasing, getting bigger each time.

Let's have a look at that, are you ready? Two more children came and sat down, one, two.

They're my two jumps on the number track.

How many children are there now? There are 13.

First, there were 11 children, then two more came and sat down and now there are 13.

Should we have a look at that as an equation? So we've started on our number track again, on number 11.

Now I know that I can fill in the parts and use the plus symbol, plus or add.

Can everyone show me that? You can do a little one like that or a big one like that.

So let's have a look, we've got 11 plus two.

There's my part, 11 plus two, two more children, is equal to, can everyone tell me? Thirteen! Well done.

The whole is 13, the parts are 11 and two.

Let's have another go.

Oh, now it's your turn to try.

Here's my next first, then and now story.

First, there were nine pencils in the pot, then I put three more pencils in the pot, how many are in the pot now? Oh, let's have a think, Should we use that number track to help us again? First there were nine pencils in the pot.

So where do I start? I start on the number nine.

Then I put three more in the pot have a little think, how many jumps do I need to do on the number track to show three more? Have a think, whisper it to your talk partner.

I think I need to do three more jumps, are you ready? One, two, three, that represents the three more pencils.

Now how many are in the pot now? Have a little think.

Where's my number line now? It's the number 12.

First there were nine pencils in the pot, then I put three more pencils in how many pencils are there now? There are 12 now.

Let's have a look at that as an addition equation shall we? We start off at nine and I know I need to add three more.

So nine is the part, we start off with nine plus, everyone do me plus, there we go.

Plus three, three jumps, three more pencils.

One, two, three, is equal to 12.

We've represented it on a number track and as an equation.

Now we're going to try it with a number line, which is very similar to a number track.

And we've got our next first, then and now story.

Oh, I've got a lovely tree there.

It's full of acorns, do think that's where Hedwig lives? Hedwig, do you live there? Oh, she woke up for that one, didn't she? Is that where you live? I think she recognises it.

Let's do our story with Hedwig's special tree.

Right, so first we've got 11 acorns on the tree before any of our animals come and eat them.

First there were 11 acorns on the tree, then three more acorns grew.

How many acorns are there now? There's our first, then, now, story.

Let's represent that.

First, there were 11 acorns on the tree, there's the number 11, then three more acorns grew, so how many jumps do I need to do on the number line? Everybody tell me, shout it at me.

Three more jumps! Let's have a look, one, two, three! There are three more jumps to represent the three acorns, how many acorns are there now? Can you whisper at the screen this time? How many acorns are there? 14, well done, there are 14 acorns.

Let's look at that as an equation.

The parts are, hmm, what's my first part? Whisper it to your talk partner.

That's right, the part is 11, that's how many acorns I started with.

Plus, how many did I add? Three, three jumps, three acorns is equal to 14, the whole is 14, the parts are 11 and three.

Now it's your turn to do this by yourself.

You've got some more first, then and now stories to do.

You've got some pictures, I've given you a number line and your equation to complete, just like we've been doing together.

Let's have a little look through them.

With your acorns, you count carefully how many acorns there are and then how many need to add to that.

Then you've got to do it with a box of eggs, count carefully there because there's a bit of a trick, can you see that the second box of eggs isn't full? So you need to count very carefully and then see how many to add.

Count how many butterflies there are and how many to add, and then the last one, independent task four, you can create your own story for this one.

So you might like to think about how many candles are on a cake and how many you've blown out, or another little story involving any of the things we've just talked about.

Pause the video now, have a go at those and then come back and we'll check it together.

Don't worry if you get a bit stuck, we'll just go through them, have fun! How did everybody get on? Shall we check those answers? So the first one we had 13 acorns, the part was 13, then we added two more.

13 plus two is equal to 15.

I did two jumps on the number line.

Then those eggs, they nearly tricked me when I was trying to count them.

First, there was 16 eggs, that's one of the parts, then, I added three more eggs, one, two, three.

That's a lot of eggs to put in a cake, isn't it? The 16 plus three, is equal to 19.

The whole is 19, the parts are 16 and three.

I needed to do three jumps on the number line.

Now the butterflies, I think this was my favourite one.

We had 14 butterflies and then we added one more, so we just needed to do one jump this time, 14 plus one is equal to 15.

I hope you had a really great time exploring and maybe you made up your own first, then and now stories.

Shall we wake up that sleepy owl? I know she woke up during the lesson to look at her house, but she went straight back to sleep again.

Now then Hedwig, we've done some lovely counting on a number line and number track today.

What did we do? Hmm, well we had lots of different mathematical equations and we used some first, then and now stories to represent the changes.

So we started off with a smaller number and then we added numbers along, which meant that we increased and we used a number track to help us and then we use a number line to show the addition, which meant that we could see exactly how many jumps we needed and we could see the numbers increasing each time.

Do you understand? I think Hedwig enjoyed our lesson today, I did too.

I'll see you again very, very soon everyone.

Have a go and do the quiz now, bye-bye.