Lesson video

Hello everyone! All my wonderful mathematicians Miss Charlton here and Hedwig, ready for some more learning.

Now today is very exciting it's another really exciting lesson.

It's part two of using the language of position direction and movement.

So, today's lesson, you're going to learn how to follow the direction or instructions on a grid and then you're going to create your own algorithms, your own set of instructions in order to complete your independent task.

So you'll need a pencil, and some paper and then you might need some items to help you count.

We're going to be counting footsteps on a grid so you might like to use something like buttons or little pieces of pasta or coins or even some counters if you have them.

You don't have to use them we could just figure it out using the grid but if you have got them they might help you count.

Let's start out with a brain teaser to get us warmed up.

We've got some number bonds to eight today, so you need to see if you can figure out those missing parts in your number bond.

Pause the screen and the come back and we'll check the answers together.

How did everybody get on? Let's have a look at our number bonds together.

So you get eight and zero eight plus zero is equal to eight.

Seven plus one is equal to eight.

Six plus two five plus three four and four is equal to eight and three and five.

Can you see there you've got five plus three and three plus five they're the same numbers but they can represent the number bond in a different way and you can do that with all of the numbers it's a bit like magic, isn't it? Right lets get started with our algorithm lesson.

These are the star words we're going to need.

Hands up star words! Left! Right! Algorithm! let's see how many times we use those in today's instructions.

We're going to start off with our algorithm song that we learnt we'll have another go over it in case you haven't heard it before.

I'm going to get Hedwig ready because Hedwig really likes this song she doesn't mind being woken up for it which is good.

Are you ready? Alien algorithm ,123 tell me how to do it, be bossy.

Alien algorithm, 123, what are the steps? Please tell me! That's our alien algorithm song because our alien only communicates in algorithms and an algorithm, have a think.

Can you remember what an algorithm is? Must be your talk to your talk partner.

an algorithm is set of instructions, your turn an algorithm is a set of instructions, well done everybody.

We are going straight on to your independent task because we had a little think about what algorithms were in the last lesson, and this is your this is your chance to really explore algorithms where you are.

So we're going to use today a grid help us practise our algorithms and you've got some little footsteps and you've got the grid to help you count.

Your job is to get these little feet at the start all the way to the finish line by writing an algorithm.

So for example you need to walk forwards but how many spaces forward do you need to go? Well I can see that I need to go one, two, three, four.

Can you put your fingers on the feet for me put your finger on the feet and I want you to count the grids count the squares forward until you get to the top.

One, two, three, four.

So if I walk forward four steps I reach the top.

What do you need to do when you get to the top? Can you keep going? No, you would need to turn! That's right you would need to turn a quarter but you need to figure out if you need to turn a quarter to the right or a quarter to the left.

And then what do you need to do to continue to get to the finish line? So your job is to write the algorithm or figure it out in your head so that you can tell somebody so that you can get your feet to the finish line.

Once you've done that one, you've got another one here.

So the same thing again.

You need to get those little feet to the finish line.

So you can use the grids that have been given to you or you can copy it and draw it out yourself and see whether you can figure out the algorithm.

And when you finish, come back and we'll check those answers together.

Don't worry if you get stuck we can help you when you get back.

Pause the video now, and have a go.

How did everybody get on? Let's see if you got this correct algorithm.

So for my feet, I need to move forward four squares.

Go forward four squares.

One, two, three, four.

I've hit the end, now I need to turn my body.

So the correct algorithm would be turn a quarter right.

So you turn a quarter right and then you're facing that direction.

Now we need to move forwards again one, two, three you need to move forward three squares.

And then you've hit a dead end again so you need to turn again.

You need to turn a quarter right again.

Then you walk forwards two squares then you've hit a dead end again so you need to turn a quarter left and then go forwards two squares to reach the finish line.

That was tricky! I kept having to turn my body and imagine which way I was facing.

If you hade the piece of paper in front of you, you could always turn it, to see if that could help you.

Now let's check the other one together.

So independent task two you needed to walk forward four squares one, two, three, four.

Then you hit a dead end.

So you need to turn a quarter left and walk forwards three squares one, two, three.

Then you hit another dead end.

So then you need to turn again, quarter right, and then go forward two squares one, two another dead end and you need to turn a quarter right again and go forward one square.

Such a long algorithm.

Did you manage to do it, or did you make some mistakes along the way? It's fine if you did, but see if you can figure out what went wrong.

I really hope you enjoyed playing with that algorithm today.

I really enjoyed it as well.

Should we wake Hedwig up and tell her what we did? Come on hedwig, wakey wakey.

Right, today we needed to concentrate really really hard on using our directional language.

So we needed to use the words forwards, turn right, turn left and then we created our very own algorithm to get some footsteps from one end of the track to another end.

I think we did a really good job of it.

Do you think you understood Hedwig.

Do you think that you might be able to write an algorithm for Hedwig to fly somewhere? You could go on a little adventure using an algorithm.

That would be good, wouldn't it? I hope you enjoyed exploring today.

See you very soon Bye!.