Hello, and welcome to lesson five of your design and technology lesson.

I am Mrs Mee, and I'm going to be your design and technology teacher.

Hopefully you've had a go at the previous lessons.

In the previous lessons, if you remember, we have explored electrical systems and what they are, and we've explored all of the key parts of an electrical system.

We've looked at mechanical systems as well and how we make things move.

And we've looked at connecting an electrical system and a mechanical system to make the mechanical system work.

And we looked at that and we evaluated it.

And if you remember, we used a key component to make it move.

Do you remember what that was? That's right, it was a motor.

So we made a mechanical system move using a motor on an electrical system, and we realised it was too fast.

So we then looked at the need for control technology when we make things move.

Now, control technology is something we're going to use when we design and make our product for this unit of work.

And last lesson, we explored the design brief.

So we looked at the design brief, which was to design and make a smart device to encourage young children to recycle.

So last lesson we looked at smart devices.

We looked at the issue of recycling.

We also then developed a design specification, specifying what our product was going to do, and then we explored some design ideas.

So today we're going to take those design ideas.

So if you haven't already done those design ideas, you might want to quickly take a peak at lesson four and at least create some design ideas.

Because today what we're going to do is we're going to start developing those ideas and turn them into a real product.

So join me in looking at what we need what we need for the lesson and what we're going to explore.

Okay, so let's look at today's lesson.

So today's lesson we're going to be developing an idea.

So you're going to need your initial ideas that you created last lesson.

So during this lesson you're going to need a paper and pencil.

You're going to need some modelling materials, and that depends on how you're going to develop your idea.

You're going to need a computer.

You're going to need to access the micro:bits.

And you are going to need some tools and equipment to help with your modelling.

So remember the rules of play.

You need to make sure you explore and experiment.

So today when you're developing an idea, it might not go right the first time.

Don't worry, because that's what we do as designers, we develop and explore ideas all of the time.

So you might make several models before you decide on your final idea.

But remember to play safe.

It's really important that if you're using scissors in today's lesson, that an adult is supervising you.

So today's lesson, first of all, you've already done the intro quiz.

We're going to look at evaluating our initial ideas and compare it to our design specification.

We're then going to look at creating a final idea by creating an exploded view.

Once you've created an unexploded view, we'll then look at how you could develop a physical model.

So we are going to use lots of key words during today's lesson.

The first keyword we're going to be looking at is initial ideas.

Initial ideas are a series of ideas or concepts that can be communicated through drawings, discussions and models.

We're also going to look at creating a final idea today.

So this is an idea that's selected from the range of initial ideas that is thought to be the best or preferable option.

We're going to do an exploded view.

And this is a way of communicating a design idea to show how parts or components of a product fit together.

We're then going to look at using the word develop.

And this is where we take an idea and we modify and improve it based on testing and evaluating.

So let's have a look at evaluating our initial ideas.

So let's just remind ourselves of what the brief is.

So remember, we are designing and making a smart device or product to encourage young children to recycle.

That's what we're designing.

So here are Mrs Mee's design ideas.

So I've created three alternative ideas to demonstrate how my ideas meet my key specifications points.

And I annotated my ideas to show my thinking.

What we're going to do now is we're going to evaluate those ideas.

So before you evaluate, let's remind ourselves of the key specification points.

So this was my specification points.

So the product needs to be programmed to interact with the user using LED display and sound.

It needs to be aimed at four to 14 year olds, help children to easily separate items. It has to have a closing mechanism, that means that children don't touch the device and it needs to have different colours to indicate different materials.

And it needs to be made from a material that can be easily cleaned.

So what do we mean by evaluate? That's right, it's where we are looking at and judging the end outcomes.

So Mrs Mee has created a simple sheet to help you and you can download this and use this to evaluate your ideas.

So I've created a simple table to allow you to evaluate your initial ideas or concepts.

Now, yes, you could make comments, couldn't you, about what's good or not so good about your design ideas, the disadvantages and advantages.

But Mrs Mee is going to use a point system.

So Mrs Mee is going to actually judge her ideas out of 10.

So smart device.

Idea one, out of 10, how well has it been designed to interact and connect with the end user? And that is where I'm going to give points.

Idea two I'm going to judge it out of 10 as well.

So I'm going to give it a mark out of 10, and then I'm going to do the same with each specification point.

So young children, how suitable is it for young children? How easy is it for them to recycle? How well does it function? So pause the video, have a go at evaluating your initial ideas and concepts.

You can use the sheet if you want to, or you can write down your thoughts on each of your ideas.

When you've had a go, resume the video and I'll show you Mrs Mee's results.

Excellent, have you had a go? So Mrs Mee has had a go as well, and these are her thoughts.

So I have rated each of my ideas out of 10.

So on my evaluation I've put the key things that it needs to do.

So the first thing it needs to interact with light and sound.

Second thing, young children.

Third was to easily separate.

No touching, colours to separate and easily cleaned.

And as you can see, Mrs Mee's given them a mark out of 10.

How am I now going to decide which is my best and final idea? That's right, I need to think about which one meets the specification points the best.

So how can I do that? That's right, I can add up all of the totals and that's exactly what I did.

And here's Mrs Mee's sheet.

So the idea that came out on top by one point was idea number three.

So I have chosen idea number three as my final idea to develop.

Which idea have you chosen? And how many did you create? You may have created six concepts, Mrs Mee only did three, but you may have done more.

So use this technique to select your final idea.

Okay, now what we're going to do is we're going to now create our final idea.

And we're going to use a technique called exploded view.

Now this is a technique you probably never used before.

So let me help you explore this technique.

So what is an exploded view? Here is a picture on the left of a piece of furniture, and on the right is an exploded view.

What is an exploded view? What is it showing you? Can you tell me? That's right, an exploded view is a drawing of a product with the components separated to demonstrate how those components go together.

So this is a piece of furniture and this is some assembly instructions for that piece of furniture, which shows how all the parts go together.

And they've used arrows to help me understand.

So Mrs Mee has created an exploded view of her final idea.

So you can see the final idea on the ideas page, idea number three.

What I've done is I've illustrated, so I sketched in pencil my exploded view and I showed how the lid pulls off and how the feet separate and come apart.

And what have I used? I've used arrows, that's right.

And I've drawn each part slightly separately to show how they go together.

Now, Mrs Mee has done a short video to help you.

So here is me showing you how to create an exploded view.

So what I'd like you to do now is take a piece of paper and I'd like you to create an exploded view to show how the parts of your final idea fit together.

You might want to watch Mrs Mee's video which shows you how she created her exploded view.

You might want to follow along.

So again, I've created the title.

I am then going to sketch the first part.

So the first part of my exploded view that I'm creating is a lid.

So I'm going to create the lid, once I've created the lid I'm then going to think about drawing the main body, but I need to draw it so it's slightly separate, but it's in line with the lid, which shows that how the lid and the main body go together.

And I'm going to actually draw the detailing on, but I'm looking at combining my ideas, because although I've picked idea three as the main one, I do like a lot of aspects of that idea one.

And remember, there was only a one point difference between those ideas.

So I'm just changing my idea slightly from that initial idea, just trying to give it more character.

So I want the part where you put the litter to look like the mouth, and I want the top piece to look like eyes and I'm going to use LED lights.

And then this part here is going to be where the user can gain points.

So that's my gamification idea.

So here I'm drawing the main body, as you can see, and I'm making sure all of the lines are lined up and parallel with the drawing.

So when she looked at this video you might want to pause it now.

Have a go at drawing an exploded view and then resume, and then we can look at what we're going to do next.

So here, Mrs Mee is just quickly sketching the main body, I'm just rubbing out part of the body that I drew.

And now I'm going to actually sketch the feet and show how the feet are separate.

And then I'm going to use arrows to show how all of the parts go together.

So you can see the arrows there to show how the lid goes on to the base.

And once you've done all of that, what you can do next is take a ruler and you can take a fine liner and you can go round all of the outlines using the fine liner.

And once you've used the fine liner, what you can do then is you can rub out all of the pencil marks and you can be left with a really clean, crisp, final idea drawing.

Okay, so pause you're video, finish your final drawing, and then when you finished your final drawing, resume the video.

Excellent, I hope you've enjoyed it.

And I hope you've got a great final idea.

Should we move on to the next part of the lesson? Come on then.

Okay, so now that we've created an exploded view, a final idea and an exploded view, what we're going to do now is develop a physical model.

So we need to explore fully how our idea will function.

So to do that, we're going to develop a physical model, sorry, to explore the materials that we might use, and modelling techniques.

So here is an example of a model that Mrs Mee has created.

And I'm going to show you how I went about creating that particular development model.

So here is a video of Mrs Mee demonstrating how to make that model.

So I took my exploded view and I use my exploded view to help me when I was starting to make my first initial model.

Now, Mrs Mee used a pencil and a ruler to actually mark out and measure the model.

But sometimes designers make quick models that are concept models and they don't measure with such precision.

These are called sketch models.

So Mrs Mee's measuring it really carefully because I want to work out what sizes I need.

Now, because Mrs Mee is measuring a mark and I have an irregular shape, I'm finding the centre point and measuring a line to be able to work out what size the back of the container is compared to the front.

So it's really important if my product's going to work that the measurements are key.

Because although at the moment I'm making one model, what I will do is obviously replicate this because I'm going to need four different containers to separate all of my recycled materials.

So once I've measured out the lid really carefully and I measured in millimetres, not millilitres, I marked out with a sharp pencil where I was measuring from and to, and those lines that I'm marking, guys, are the lines where I'm going to cut.

So that is the lid done.

And once I've measured and marked out the lid, I'm then using scissors to carefully cut round the lid.

Once I've carefully cut round the lid, what I'll then do is think about how I can fold it.

So now I'm actually demonstrating how to fold.

So to fold it, I'm using a ruler and the sharp end of the scissors being really careful.

Now remember, if you're using scissors, you must have an adult supervising.

By scoring the lines it will allow me to fold it easily as you can see.

Now, Mrs Mee has done the lid and she's taped the corners just roughly with some tape.

And she's measured and marked out the nets for the actual base.

So as you can see, because I've carefully marked out the lid, that same shape is being used on the base.

And I've measured each side.

And what I'm going to do now is I'm going to score it.

Once I've scored it, I'll then tape again.

I wonder what I could have you used on the edges to attach them more easily? So I've just used tape on those edges there.

And as you can see now, adding the lid to the base, what could I have used instead of just using tape? Do you know? I could have used tabs, that's right.

So a net sometimes has a strip of card on the ends, there you can see my model, and I've taped on the feet.

So that is my first model of my final idea.

So what we want you to think about is, we want you to have a go at making your own model.

So your task is to make a physical model to show how your idea will meet the key specification points.

Now, in this model, we can't show necessarily how it's going to be a smart device, can we? Because this model is a physical model, we'll need to do that by actually going onto the micro:bit website and actually programming the micro bit to act as our smart device.

And if we had a physical one we could physically programme that as well.

So make your physical model to show how it will meet the needs of the young children.

So mine was four to 14, and that's why remember, I didn't make it too child friendly, it wasn't too animated.

It's got to encourage recycling.

So that's where my smart device will come into it.

But my model each bin will have a different coloured lid.

Function, it's got feet as pressure pads to actually alert and allow the user to interact with it.

And it's got open shapes that they can just drop the rubbish in, so there's no need to touch the bin.

And then again, like I said, we're going to have three different colours and I've used that particular shape.

So make your physical model, pause the video now, go off and measure and mark out and make your physical model.

You can use card or paper, it's entirely up to you.

And once you're done, come back to me and we'll just conclude today's lesson.

Fantastic, so hopefully you've made a fantastic model.

And if you're anything like me, you may have made a few models in between.

That's fine, it's called iteration.

Mrs Mee made a few models too beforehand, so don't worry.

So I hope you enjoyed that part of the lesson.

And we've had a really fun packed lesson.

You've completed the intro quiz before you begin, we've evaluated the initial ideas if you remember, comparing them to the specification.

And I judged which ones I felt met the specification best, and I voted that my idea three was the best.

I selected that as my final idea.

And I used, and I demonstrated to you how to create an exploded view of your drawing to show how the components go together.

And then of course we looked at developing your physical model.

So I hope you've enjoyed that lesson.

And I hope you've enjoyed exploring how an idea might go from an initial concept to a finished final prototype as a physical model.

If you'd like to share anything from today's lesson, a photograph of what you've done, please ask an adult to share that photograph on Twitter @OakNational, using the hashtag LearnwithOak.

And Mrs Mee will be able to see all the fantastic creations you've done.

Hope you enjoyed that lesson and I'll see you next lesson where we'll continue developing ideas.

Thank you for joining me, goodbye.