Hi, everyone, I'm Mrs. Courts, and I'm very excited to join you for our lesson today on "Finishing and Testing Windmill Mechanisms." This is part of the "Rotary Mechanisms: Windmills" unit.

Our lesson outcome for today is I can finish and test my windmill.

We have five keywords for today, and I wonder if I say them first, can you repeat them after me? Brilliant.

So our first word: axle.

Axle.

And axle is the rod that holds the sail in place and allows it to turn.

Well done.

Testing.

Testing.

Testing means to try something and see if it works and see if we can make changes or make it better or improve it.

Feedback.

Feedback.

Super.

Feedback are comments or suggestions on how to improve to make a product better.

Well done.

Success criteria.

Success criteria.

A success criteria is a list which helps to see if the object does what it is expected to do.

Evaluate.

Evaluate.

Evaluate means checking how good something is and how to make it better.

Great listening, well done.

In our lesson today, we have three learning cycles, and our first learning cycle is making wind sails.

Are you ready? Brilliant.

Izzy said, "I have made a windmill tower using cardboard and added oats as the ballast." That's really good, Izzy, and I can see your windmill tower just there.

Have you finished making your windmill towers? Did you add any ballast? What is ballast, I wonder? That's right, ballast is the weight at the bottom of the windmill.

That might be oats or sand or small stones.

Well done.

I wonder what did you use as your ballast? Have a little think.

Brilliant.

Laura said, "Did you put a wide base on your windmill to make it freestanding?" Wow.

Well, Laura, this one doesn't need a wide base because it's not falling over, but some of them might need a wide base to stop them falling over and to make them freestanding, so stand up by themselves.

Well done.

We are ready for our first check for understanding, and if you've been listening, you might know the answer to this.

Ballast is a heavy material to weigh something down.

Which two of the following would make a good ballast for a model windmill? Feathers, oats, sand, which two? Pause video now and have a little think.

Welcome back.

Did you manage to guess which two would be a good ballast for a model windmill? That's right, it's oats and sand.

Well done.

Feathers would not be heavy enough, would it? Brilliant.

To make wind sails out of our chosen material, we will need the following materials and equipment: We will need scissors, our chosen material, a template, sticky tack, and then to decorate, we'll need pencils, felt pens, and crayons.

To cut the wind sails, we use scissors, and scissors are a tool.

We need to hold them carefully.

We need to sit down when we are cutting.

We only cut paper and card and materials for our project with our scissors.

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

You might remember this.

We put the sticky tack on the table and we put the wind sail on top.

Using a pencil, we put a hole in the wind sail.

We remove the sticky tack and your wind sail is ready.

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

We then cut along the four solid lines.

After that, we fold along the four dotted lines.

And finally, we put a hole in the centre.

The folded sails catch the wind and turn the sails around on the axle.

We are ready for our next check for understanding.

Isn't it nicely? Brilliant.

Well, this is a true or false question.

The folded parts of the wind sail catch the wind.

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

Welcome back.

Was it true or false? Well, the folded parts of the wind sail catch the wind is true.

Why is it true? That's right, by folding the wind sail, each sail catches the wind and is pushed around and around.

Well done.

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

We are going to make our own wind sail using our chosen material.

Here is the template.

Izzy said, "Quick tip: Cut out carefully along the lines," the solid lines.

She then said, "Quick tip: Fold along the dotted lines." Very carefully.

Thank you, Izzy, that's lots of help.

We'll need to remember those tips.

Then, decorate both sides of your final wind sail using pencil, crayon, or felt pen.

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

Welcome back.

Hope you've had lots of fun making your own wind sail using your chosen material.

Did you remember Izzy's quick tips cutting along the solid line and folding along the dotted line? Well done.

Well, this is Sofia's finished wind sail.

Sofia said, "I took my time to cut it out and to fold the sails.

And I made it out of card." Well done, Sofia.

That's a lovely wind sail.

"Now, I need to decorate it using pens and crayons." That's another job to do, Sofia.

Well done.

Did you manage to decorate yours? Brilliant.

We are now ready for our next learning cycle, and this is making the axle.

An axle is a rod that holds the sail in place and turns in a rotary motion.

Do you remember the word rotary motion? That circular movement.

Well done.

Some axles we can see and others are hidden within the tower.

In this windmill, a plastic bottle has been used for the windmills tower just so we can have a look and see what it'll look like.

Here is the axle.

Can you see the axle? The wooden dowel goes all of the way through the tower, making an axle.

The wind sail goes on the axle and these will then turn in the wind.

And if you look very carefully on either end of the wooden dowel, you can see a little piece of tape to stop the wind sail falling off or the axle falling away from the bottle.

When making a windmill, you might use a piece of wooden dowel or thick straw to make your axle.

We are ready for our next check for understanding.

Which arrow is pointing to the axle on the windmill? Is it A, B, or C? Pause the video now and have a little think.

Welcome back.

So which arrow is pointing to the axle on the windmill? It is, that's right, it's A.

Well done.

To make the axle for your final windmill design, we need the following equipment and materials.

We should have cut out the sail by now.

We'll have scissors, a pencil, straw, wooden dowel, split pins, and sticky tack.

To add the split pin for the axle, first, put a hole in your tower and wind sail using the sticky tack and pencil method.

Then, put the split pin through the wind sail and then into the wind tower.

Open the split pin, and fix inside the tower.

Remember to be careful because the split pins could be a little bit sharp.

To add the wooden dowel or straw to make your axle, first, put a hole in the tower and the wind sail using the sticky tack and pencil method.

Then, put the dowel or straw through the tower and put the wind sail on the front.

Finally, use the sticky tack on the front of the sail to hold it in place.

And you might need a piece on the back of the axle to hold that in place too.

You could also use a little bit of tape, but remember, there has to be a space between the sticky tack and the sail so then the sail will still turn on the axle.

We are now ready for our next check for understanding.

Are you ready? Super.

Which of the following could you use as an axle? A, paper, B, split pin, C, thick straw or wooden dowel, or D, feather? Which of the following could you use as an axle? Pause the video now and have a little think.

Welcome back.

So which of the following could you use as an axle? Would be, you're right, a split pin or thick straw or wooden dowel.

Well done.

We are ready for Task B.

Isn't it nicely? Brilliant.

So first, join your wind sail using an axle.

And then tell your friend how you made your axle.

Did you use the wooden dowel, did you use the thick straw, or did you use a split pin? Remember to be careful your fingers and remember how to keep the wind sail on the front of the axle if you use the straw and dowel method.

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

Well done.

Welcome back.

Well, by now you should have added your wind sail and your axle to your tower.

Well, Sofia shared her work, and here's a picture of it, look.

Sofia said, "I used a straw for my axle but the sail kept falling off." Oh, no! I wonder what Sofia forgot to do.

Oh, no.

Well, Sofia said, "My friend reminded me to put a piece of sticky tack at the end of the straw." You have a very good friend there, Sofia, that's helped you.

Well, I'm glad that Sofia also remembered to make sure that her wind sail wasn't near the sticky tack and therefore her wind sail would've been able to turn.

Well done, Sofia, lots of hard work, and well done for adding your axles and sails to wind towers.

We're into our final part of our lesson today, our learning cycle three, and this is testing and evaluating a windmill.

Testing is a way of checking if something works and it also allows the designer to find ways to change it and to improve it.

Sofia said, "The windmill sails need to turn.

If we test the windmill, we can see if they turn in a rotary motion." I know you know what that word means now.

That's right, it means in a circular movement, circular shape.

Well done.

So what could you do to test that your windmill works? Have a little think.

For the windmill to work, it is important for the sails to turn on the axle.

Well done.

Sofia says, "We could go outside to test the windmill in the wind or test it inside by blowing on the sails and seeing if they turn around." They're two very good ideas, Sofia.

Designers test throughout the making process and this helps them to make sure that everything works.

Sofia says, "Without testing my sail, I would've forgotten to put the sticky tack at the end of the straw to hold the sail in place." Oh no, that's very good that you tested your wind sail, Sofia.

We are ready for our next check for understanding.

When should a windmill designer test if the windmill works? Is it A, at the end of making it, is it B, throughout the making process, or is it C, never? Pause the video now and have a little think.

Welcome back.

Well, when should a windmill designer test if the windmill works? You're right, it's throughout the making process.

That way, they can sort out any issues as they go through making it.

When designers test that designs work, they check it against a success criteria.

Can you say success criteria? Brilliant.

Well, success criteria for a windmill means that the windmill has wind sails.

It should have an axle that helps the wind sails turn in a rotary motion.

And it should be freestanding.

If something works, then it is our success.

Show me thumbs up.

If something works, it should be a success.

Well done.

We are ready for our next check for understanding.

So what are success criteria? Is it A, a list which can be used to check if something works, is it B, rules on how to make something, or is it C, drawings of the final product? Pause the video now and have a little think.

Welcome back.

Well, a success criteria is, you are right, a list which can be used to check if something works.

Well done.

Once the windmill has been tested and checked, that it meets the success criteria, it is important to share feedback.

Can you say that word? Feedback.

Feedback.

Brilliant.

Feedback is important and designers use it to get other people's views and ideas.

And the feedback helps the designer to then evaluate their work.

Feedback is like a sandwich.

Making me feel a bit hungry.

Remember to tell your friend something you liked about their work, something they could change to make their work better, and something that makes you happy or that you enjoy using in their work.

This feedback is peer evaluation.

It's our friends talking to us.

When you give feedback, remember to be.

"Kind," says Izzy.

"Think of other people's feelings." It's a very good point, Izzy.

Lucas said, "It has to be useful.

Think of something to help them." And Jacob said, "Be respectful.

Remember, everyone does things differently." Those are very good points.

We are ready for Task C, and I would like you to test that your windmill works.

You might need to go outside or you might need to blow on your windmill to see if you can make your sails turn.

And then I want you to check that you've met the success criteria.

Does it have wind sails? Has it got an axle that helps the wind sails turn in a rotary motion? And is it freestanding? When you've done that, I would like you to talk to your friend and ask for feedback.

Ask them for two things that they liked about your design and ask them for one thing that they might change.

Pause the video now and complete Task C.

Welcome back.

Well, by now, you should have been outside to test if your windmill works, or you might have tested it inside, blowing your wind sails round to see if they turn.

You should have also had a look at the success criteria and talk to your friend and ask them for feedback.

Well, Sofia completed the worksheet, and she ticked the success criteria and she went outside to test that her windmill worked.

Her windmill does have sails, and it has an axle that helps keep the wind sails turning in a rotary motion, and it is freestanding.

Well done, Sofia.

Sofia then talked to her friends and they gave her some useful and helpful feedback about her windmill.

Izzy said, "Your windmill works very well.

Lucas said, "To help the sail spin smoothly, you could put a space between the sail and tower." That's a very good point, Lucas.

And Jacob said, "I like the colour you chose for the wind sail." What lovely feedback from her friends.

Did you give people feedback and get feedback on your design? Brilliant.

We've reached the end of our lesson for today and we should by now know that testing a model windmill allows us to check that it works as expected, and success criteria can be used to check that a model windmill works as expected, and finally, a successful model windmill will stand on its own and have sails that rotate.

Well done for all of your hard work today and hope you've had lots of fun.

See you next time.

Bye.