Hi everyone, I'm Mrs. Courts and I'm very excited to join you today for our lesson on testing wind sails.

This is part of the Rotary Mechanisms, Windmills Unit.

Are we ready to begin? Brilliant.

Our lesson outcome for today is, I can test wind sail designs to decide which is most effective.

To do this, we've got four new keywords.

Are you ready? I'll say them first and then you repeat after me.

Sail.

Sail.

Excellent.

Sails, these catch the wind and either turn or billow out to make something move.

Model.

Model.

Model means making an example of something to test or to learn new skills.

Test.

Test.

Super.

Test means trying something to see if it works and to make changes or improvement to it.

Rotary motion.

Rotary motion.

Excellent.

A rotary motion is something that turns around in circles.

A circular motion, circular movement.

Well done.

Great listening.

We've got two learning cycles today, two parts to our lesson.

And our first part is make a wind sail.

Are we ready to begin? Super.

Have a look at the pictures.

Do you know what these are? Once you've worked out what they are, what are the arrows pointing to? Well, these are wind sails.

Well done, there's a yacht and there's a windmill, a plastic windmill that you might find in your garden.

And these are wind sails that it's pointing to.

Well done if you got it right.

A wind sail is something that captures the wind and then makes the object move.

Wonder what these are used for, these wind sails? Well, on a yacht, the wind sail is used to push the boat along the water.

And in a windmill it's used to turn the sails around.

The wind can make some sails billow out, this means the sail changes shape.

So instead of it being like this, the wind pushes on it and it billows out and it pushes the boat along, so the wind pushes the boat along.

Laura says, "This type of sail does not use a rotary motion." Remember, rotary motion is where something goes in a circular movement, a circle shape.

This sail doesn't because it's a piece of material, piece of fabric, and it billows out, the wind pushes it along, it then moves.

Other wind sails hold their shape as they turn.

Can you see this windmill? The wind hits the wind sail and it pushes it around in a rotary motion.

Can you see it spinning? It creates a spinning effect, just like on the windmill.

We are ready for our first check for understanding.

Are you sitting nicely? Excellent.

True or false, all wind sails turn in a rotary motion.

Is this true or false? Pause the video now and have a little think.

All wind sails turn in a rotary motion is false.

Well done.

Why is it false? Why? It's false because some wind sails billow out and catch the wind, and some wind sails use the rotary motion to turn.

It is always good to make a model to practise how to do something or to learn a new skill.

We can test the model to see what worked well and what we need to change for next time.

To make a wind sail we need these materials and equipment.

We need a template.

We need some scissors.

And some pencils, crayons and felt pens.

To cut the wind sail, we use scissors.

Scissors are a tool and therefore we need to hold them carefully when we move around the classroom, and we need to sit down when we're cutting.

These are very important things to remember.

And above all we only cut paper, card and materials for the project that we are doing with our scissors.

To cut out the wind sail, we need to cut around the edge of the square.

We cut along the four solid lines.

Can you see where the arrows are pointing to? Remembering stop when we get to the end of that straight line.

And then we put our scissors down and we need to fold the four dotted lines.

Ready for our next check.

Let's see if we've been listening to the instructions for how to make our wind sail.

Are you ready? When making a wind sail, we cut along the.

Was it A, dotted lines.

B, solid lines.

Or C, dotted and solid lines.

When making the wind sail, we cut along the.

Have a think.

Pause video now and have a little think.

Right, so when we are making our wind sail, we cut along the solid lines.

Well done.

Our next check for understanding, when making a wind sail we fold.

We fold along the.

Is it A, dotted lines.

B, solid lines.

Or C, dotted and solid lines.

Pause the video now and have a little think.

When making a wind sail we fold along the dotted lines.

Well done.

So we cut along the solid lines, we fold along the dotted lines.

Well done.

Good remembering.

We're now ready for our first task, Task A.

Hope you've been listening carefully and are you ready to start? Excellent.

So, to make your wind sail, Izzy says, "Cut out carefully along the lines.

Remember that you cut the solid lines." You start from the corners of the square and you cut towards the middle.

Remember to stop before you get to the middle.

Remember, stop at the end of that line.

Well done.

And then she says, "Fold along the lines carefully, the dotted lines." And when you've done that, part two is decorate both sides of your wind sail using pencil, crayon or felt pens.

Pause the video now and join me when you've completed Task A.

Welcome back.

By now you should have completed Task A and let's see how you got on.

Maybe you'd like to share your wind sails with your friends.

Well, this is Lucas's wind sail and Lucas said "The cutting was quite hard and I had to take my time.

I found the cutting quite hard and needed to remember to turn the paper around, not my scissors." We're now ready for the second learning cycle, second part of our lesson, which is to test and improve our wind sail.

Wind sails need to be able to turn in the wind.

Can you see the windmill turning? When they turn, they move in a rotary motion.

The circular movement.

Good memory, well done.

A windmill has a wind sail and a tower.

Have a little look at the pictures and see if you can spot the sail and the tower.

There's the sail.

Well done.

Did you spot the tower? Brilliant.

Super.

And to test, which means to try out, our wind sails, we will make a model using a thick paper or plastic straw, and our wind sails that we decorated in the first part of the lesson.

This is our next check for understanding.

Let's see if you've been listening.

So true or false, if we make a wind sail, are we making a model? Is that true or is that false? Pause the video now and have a little think.

Right, if we were to make a wind sail, we are making a model, that is true.

Why is it true though? Why? That's right, a model is when we make an example of something.

This could be a model to test that something works or to learn how to do a new skill.

Well done for trying so hard.

To safely put a hole in the middle of our wind sail, we're going to use the sticky tack and pencil method.

This is the safest way to do this.

So have a little look at the video and see if you can follow the instructions.

First, put the sticky tack on the table.

Did just spot it? And then put your wind sail on top of it.

Make sure that where you want to put the hole is on top of that sticky tack though.

Then, using a pencil, put a hole in the wind sail pushing through to the sticky tack underneath.

And then carefully remove the wind sail, and the sticky tack and your wind sail is ready to use.

Right, let's see if you've been listening how to put a hole in the wind sail.

So what should we use to put holes in paper? Is it A, sticky tack? B, scissors.

Or C, a pencil.

There might be a couple of answers here, so be careful.

Pause the video and have a little look.

Right, to put holes in paper we would use sticky tack and a pencil.

Do you remember we put the sticky tack at the bottom, our paper on top, and we used our pencil to put our hole through.

Well done.

To make our wind sail model, you will need these materials and pieces of equipment.

You'll need a template, a pencil, a straw, and some sticky tack.

To test your wind sail works, we will need to put a straw through the middle.

So put the hole in the centre of your wind sail using that sticky tack and pencil method.

And check the hole is big enough for a straw to fit through.

And then, put the straw through the hole in the wind sail.

And finally, you can blow on your wind sail to see if it turns.

Our next check for understanding.

When we test the wind sail, we need to see if it.

What's it do in a breeze.

When we test the wind sail, we need to see if it, something in a breeze.

Does it A, waves.

B, folds.

Or C, turns.

Pause video now and have a little think.

Right, well let's see if we got this right.

So when we test the wind sail, we need to see if it turns in the breeze.

Well done if you've got turns because we are looking for the wind sail to turn like the blades or sails on a windmill or wind turbine.

Well done.

We're onto our final task, Task B.

And the first part of this is put your wind sail on the straw.

And then number two, test your wind sail with a friend.

You might blow to create a breeze to see if your wind sail turns.

And number three, our challenge for today, make another wind sail using a different sized piece of paper.

Does it still work? Is it any better? You might make a bigger wind sail or a smaller wind sail.

Pause the video now and I'll see you once you've completed Task B.

Welcome back.

Well by now you should have put your wind sail onto your straw, tested it with your friend, see what happens if it worked.

And then you might have even achieved the challenge of making another wind sail using a different sized piece of paper.

Well, the children tried their wind sails and Jacob said "Mine went round and round when I blew on it to make it turn." Well done, Jacob.

Andeep said, "I made the hole in the wind sail a little bigger and this helped it to turn in a rotary motion." Do you remember what rotary motion means? Brilliant.

Round in a circle.

We've reached the end of our lesson for today and I hope you've had lots and lots of fun, and enjoyed making your wind sails and testing them.

Maybe you can show me a thumbs up if you feel you've met these learning points.

Are you ready? Wind sails are designed to catch wind.

Show me a thumbs up if you've achieved it.

Well done.

Wind sail models show how wind sails work.

Brilliant.

And by making simple models, designs can be quickly tested.

Well done.

We've had lots of fun and I hope you've enjoyed the lesson.

I'll see you next time.

Bye.