What is a mechanism?

What is a sketch?

Why is using a bridge in your design important?

Why is adding annotation to a final design important?

Planning the creation of your final design

﻿Hello, I'm Mrs. Enock and I'm so happy to be your design and technology teacher for mechanisms, levers and linkages. Now, in today's lesson, we are planning the creation of your final idea, all the hard work that we've been doing, we are now putting it all together for our final design. I'm very excited about today's lesson. Let's go and start our learning. Let's see what we're learning about in today's lesson. First we're going to recap on the design brief and criteria. And we're going to recap on our previous design. We're also going to develop a new skill, looking at an exploded diagram. After that, we're going to work on our final design, and then we will check our final design against the criteria. Wow, it looks like a very busy lesson and extremely productive lesson today. I cannot wait to get started. In today's lesson, you are possibly going to need a pencil, rubber and ruler, cardboard, which can be from recycled boxes, scissors, split pins, and something that you can safely push a pencil into so for example, some blue tack or small sponge or something so you're not putting a hole into the table. Now remember, scissors must be used under the supervision of a parent or carer. In today's lesson, we have some key words that are really important for us to be able to use, say and understand. Our first word is mechanism. Can you say that for me? That is great. A mechanism is a device used to create movement in a product. Our next word is exploded diagram. Can you say that for me? Fantastic, an exploded diagram is when a diagram is split up into different parts to show exactly how something is put together. We will explore this together in today's lesson. It's now time to recap on design brief and success criteria. Our design brief is... That right, is to design a persuasive picture with moving parts. We're going to make sure that the parts are moving and by doing this we will include a lever and a linkage to make movement. We need the picture with the moving mechanisms to be controlled. The movement needs to be smooth and controlled. And we will add bridges to give that control movement. We want the persuasive picture to be appealing. We want it to look attractive to the viewer. And finally, we want it to be persuasive. The picture or advert must persuade the viewer to do or think something. Let's just recap. The poster does not need to have moving parts pointed true or false. That's right, it's false. The design brief states we must have the linkages and levers to make part of the picture move. The poster will be designed to persuade the viewer when to true or false. Absolutely true, we are when we need to persuade. That's why it's called a persuasive picture. Let's check that we really understand our design criteria. Have a look at the four options. We have appealing, big, persuasive, and have moving parts. Point to what you think needs to be included in your design criteria. There might be more than one answer. Did you come up with these three ideas, well done if you did. The design criteria needs to be appealing, so people want to look at it. It needs to be persuasive. It wants to encourage people to do or think something and it also needs to have moving parts in making sure mechanisms are included. Size is not a criteria for this product. That is the decision you have based on what materials and resources are available to you. We're now going to recap on our previous designs. Here was the front of my persuasive picture. I decided I wanted messages that were short, sharp and snappy. I thought about useless plastic and save our planet. I really wanted people to feel emotional when they saw my picture. So I wanted my persuasive pictures to make people think about the decisions they make. So I chose to make my sea creatures looking sad. And I chose to draw the plastic on the sea creatures to really make people think about the impact of plastic in our seas and oceans. Finally, I decided to see that in the background will be quite simple. So the emphasis would be on the words and the moving pictures. But as you'll see soon, even when I did this design, I still was brave enough to make a few changes, you'll see soon. Okay, this was the initial back of my persuasive picture, where I started to focus on the movement I wanted for my turtle, and for my two fish. Now, have you seen where I started to make my design change? If not you soon will, okay. In a moment, we're going to develop the skill of an exploded diagram. This is such a great strategy for us to really plan out exactly what we're making with the mechanism. What we need to ask ourselves is what is an exploded diagram? What is an exploded diagram? An exploded diagram is where you draw each individual section separately. This is so important, because it helps people see how it is put together. The word exploded reminds me of a little explosion. So imagine you've got your product your picture all together, but you can't see what the little parts are. By adding a tiny explosion to your picture, everything starts to explode out and separate. And this helps you see each individual part. And the great thing about this is if you can see each part separately or you can see how to put it back together again. Now, this is really important for us to ask ourselves, why do designers even bother to create exploded diagrams when making a final design? What's the point of that? Is it to help people see how a product is put together? Or is it to help people see why it looks pretty? Point to the right answer now. That's right. The whole reason why designers create and use exploded diagrams is to help people see how a product is put together. Let's practise looking at exploded diagrams a little bit more. Have a look at the picture on the screen. What is this an exploded diagram of? Press pause have a think and a discussion of what it could be. Remember in the picture, every item has been exploded out to help you know how to put it back together. Did you come up with an idea? Let's see what it is. In ball point pen. Can you see it now? That's great. Let's look at another exploded diagram. Have a look at this picture. The clue is it's something yummy to eat. What do you think this is an exploded diagram of? Press pause have a think and discuss your ideas? Off you go. Did you come up with lots of ideas? Well done if you did. Let's see what it is. It's a hamburger. Can you see all the individual parts? Can you point to the cheese and the lettuce and the bun itself? We've got the hamburger and it's exploded out so you can see all the individual parts. What is this an exploded diagram of? The clue is it's something a baby would enjoy. Ready, press pause and discuss your ideas now. Did you guess what it was? It's a child's toy. Just like the picture below. You can see each individual part has exploded and been drawn separately so we know how it should fit together. Okay, it's now time for you to explore drawing an unexploded diagram. I would like you to pause the video and draw an exploded diagram of a sandwich. You can include as many in fillings as you want. In fact, the more fillings you add, the more of an exploded diagram, you can produce. Just a quick sketch, you don't need to spend too long on it. Press resume once you're finished. Ready, off you go. Did you draw an exploded diagram? I bet it looks delicious. We're now going to apply our exploded diagrams to the mechanisms we are making, especially the pivots. Here's an example of a drawing of the fixed pivot. Have a look at the picture. In a moment, I'd like you to press pause and say, how you know that this is an exploded diagram of a fixed pivot. Once you discuss your idea, press resume, and we'll talk through it together. Ready, off you go. Did you discuss the fixed pivot? Well done if you did, I notice from this drawing that there's this safe split pin that goes into a cardboard lever that goes into a larger piece of card. So therefore, it is attached to the back of the card, making it a fixed pivot. Here's an example of a loose pivot, press pause and discuss how you know it's a loose pivot. When you're done, press resume and we'll explore the loose pivot together. Did you come up with lots of ideas? Well done, if you did. Looking at the picture, I can see the split pin is just going straight into one piece of card. It is not being attached to the back of a backing card. That's a great example of a loose pivot. Okay, I would like you to pause the video and practise drawing an exploded diagram of a loose and fixed pivot. Once you've done your sketch, press resume when you're finished, and we will carry on learning together, ready off you go. Well done for exploring you exploded diagram. It's now time for us to focus on our final design. This is the last step of the process before we start making our actual product. Now as you can see, I spent a lot of time on my final design. And I actually made a last minute change. Can you see what it is? I decided to go back and change my second mechanism and actually have the fish next to each other. So I split my final design for a persuasive picture. And on the left hand side, I've made notes of my mechanisms, which you can see highlighted in red. So my turtle is my mechanism one. And if you look at mechanism one, you can see what I've done and this time I've actually added the measurements. So I know that my long lever needs to be 18 centimetres long and two centimetres wide. And I also know why experimenting and exploring that my smaller lever needs to be six centimetres long and one centimetre wide. If you look at mechanism two, it's the two fish moving together, and I've made the arrows of where the movement will be. Now you can refer on the left hand side to the red X area of mechanism two that I've got my two loose pivots and the fixed pivot so both fishes will be next to each other now. My card is going to be 15 centimetres by two centimetres for the longer piece. And the smaller card is going to be five centimetres and one centimetre wide. And just to add that extra detail in red, I've drawn the exploded diagram of the mechanisms I'll be using of my fixed pivot and my loose pivot. Okay, now we can explored the areas of the red and the yellow of the measurements. Let's have a look at the blue. Now this is the annotation of what I've decided at the front of the cover to make it look persuasive and aesthetically pleasing. That means to look nice to the eye. Now, I did make a last minute change. I decided to have useless plastic in larger bold writing and I decided to move the screen message save our planet to the bottom, still having it in bold. But I really wanted to persuade people to use less plastic, which is why I made that last minute decision. I've also made the notes that I'm going to have a full blue card, and that I'm going to draw extra plastic in the sea in the background. So I'm quite proud of my final design, it took a lot of time and thinking, but it was made easier. Because of all the opportunities I had to explore, develop, and be not be afraid to change my ideas. You've guess what your task is now, haven't you? That's right, it's time for you to create your final design of your persuasive pitcher. We've had so much time to explore, develop and improve our ideas. So hopefully, you now feel really confident to draw and annotate your final design that adds those important notes. Try and add measurements when needed, and use exploded diagrams where it will be useful. Once you worked on that press resume. And we'll carry on the lesson together. Ready, go create your final design. For you, well done for creating your final design. I bet it was a lot of work, but I bet they're looking credible. Right, now we've got our final design, we need to do a quick check against the criteria, just to make sure that we're still on the right tracks of what we're going to produce. Checking the final design against the criteria. So my final design will be moving because I've added two separate mechanisms. There'll be an input of two with an output of three moving mechanisms. It's going to be controlled because I've added a bridge where needed. Yes, I feel that my design is appealing, because it's going to be clear with bright colours and a clear message. And it's definitely going to be persuasive. I'm using persuasive pictures and persuasive phrases. And I'm really clear that when people look at my picture, they're going to be persuaded to use less plastic. My goodness, what a busy and productive lesson. Let's see exactly what we learned today. First, we recapped on the design brief and criteria. We recapped in our previous design, and we explored the scale of an exploded diagram. We went back created our final design and checked our design against the criteria. I'm really proud of how much you've learned today. And I hope you're proud of the work that you've done too. All this left to say is I'm really proud of you and I'll see you soon. Good bye for now.

What is an exploded diagram?

What is this an exploded diagram of?

What does the final design include?

use annotated sketches and exploded diagrams to develop and communicate their ideas

refer to their design criteria as they design and make

In this lesson, we will be creating a detailed plan of the stages of making our final product. We will learn how to produce exploded diagrams to show our ideas. 

This lesson includes equipment beyond pen, paper or pencil. Please make sure your child is adequately supervised.

Design & Technology

Y3 Design & Technology

Key Stage 2

Year 3

Planning the creation of your final idea

Mechanisms: levers and linkages

UNIT

Understanding how a range of mechanisms create movement

Developing understanding of different mechanisms and how to make them

To design a product criteria, meeting the needs of the user

Using a range of techniques to create a prototype of developing ideas

Developing design ideas further, using understanding of mechanisms

Using a range of techniques to begin to make our final idea

Using a range of techniques to complete final idea

Using a range of techniques to complete final idea and testing against design criteria

Evaluation of final product and considering the views of others

Lesson overview:Planning the creation of your final idea

Core Content

Substantive Knowledge

Disciplinary Knowledge

Lesson Vocabulary

Equipment Required

Content guidance

Supervision Level

Mechanisms: levers and linkages: