Lesson video

Hi, everyone.

I'm Mrs. Courts and I'm very pleased to join you for today's lesson on graphic designs.

This is part of the "Products and people: inspirational design" unit.

Our lesson outcome for today is I can choose and use communication techniques that are appropriate to showcase a product.

In our lesson today, we have four keywords.

Let's have a look.

Our first is diagram.

Diagram.

A diagram is a simplified drawing showing information.

Cross-section.

Cross-section.

A cross-section is an inside view of a 3D object when cut across a plane.

Isometric.

Isometric.

Isometrics are drawing 3D objects to scale, with shape sides drawn at 30 degree angles from the horizontal.

And our final word is angle.

Angle.

An angle is the direction from which you look at something.

In our lesson today of graphic designs, we have two parts, two learning cycles, and our first is exploded and cross-section diagrams. When producing design work, it is important to choose the best communication method based on the purpose of the drawing.

You could show your design through freehand sketching, cross-section diagrams, exploded diagrams, and isometric diagrams. Freehand sketching is used for quick drawings, and this is useful when you have lots of ideas.

Sketches can show one view and angle, or they can show different angles.

A cross-section is the internal, the inside view of an object that cannot be seen from the outside.

Imagine cutting something in half.

The new internal view is the cross-section.

Cross-section diagrams are often used to show the internal view of a three-dimensional object in two dimensions.

You may have seen some of these in a science lesson.

Eye, bone, or tooth diagram.

So cross-section diagrams can be drawn from the horizontal or the vertical perspective.

And these are called planes.

Imagine this as the direction of the cut.

So here is a horizontal cut.

It's cut from left to right.

And here is a vertical cut.

It's cut from top to bottom.

Vertical and horizontal planes can provide very different views.

A 3D object, a cylinder, a horizontal plane, and a vertical plane.

You can see they look very different.

We can see the difference when we cut open fruits or vegetables in different ways.

Vertical plane, and you can see the diagram.

A horizontal plane, and you can see the diagram very different.

Cross-section diagrams are often used for engineering and manufacturing, designing machines.

For example, engines and electronics.

Product design, such as displaying internal components called parts of items like smartphones, shoes, or appliances.

They are needed when a design has internal parts that can't be seen from the outside.

So cross-section diagrams are used in product design to show how the product's made, how the parts fit together and how it works.

Here is a cross-section diagram of a torch.

Have a little look.

We are now ready for our check for understanding.

Hope you're listening really, really carefully.

So which product would need a cross-section diagram, A or B? Pause the video now and have a little think.

Welcome back.

So which product would need a cross-section diagram? That is, not A, no, but B, well done.

So A, if all details are visible on the outside, a cross-section diagram isn't needed.

But if your design appears solid but has hidden details inside, a cross-section diagram is needed.

Well done, everyone.

We're ready for our next check for understanding now.

So match the cross-sections with the objects, a, b, c, and d.

And you've got numbers 1, 2, 3, and 4.

Pause the video now and have a little look.

Welcome back.

So match the cross-sections with the objects.

Let's have a look.

So we're saying, a, goes to number 4.

Well done.

b is number 1.

It's the inside of the tree, tree trunk.

And c goes number 2, it's the inside of a house.

And d is the eye.

Well done, everyone, great work.

Exploded diagrams. One exploded diagram is a drawing that shows all the parts of an object separated but still positioned in the way that shows how they fit together.

These diagrams help engineers, designers and builders to understand how things work and how they're put together.

Here is an exploded diagram of a fidget spinner.

Can you see? Exploded diagrams should include clear drawings of each part, equal spacing between parts, parts labeled with words, numbers, or letters, and a center line, a dashed or solid line showing how the parts line up together.

Can you see the exploded diagram of a brick tower? A horizontal exploded diagram is more suitable for objects with parts that connect side by side.

In an exploited diagram of torch, the caps, lens, electronics and internal components would be moved outward to show how they attach to the case.

Ready for our next check for understanding now.

So which shows a cross-section diagram, a, b, or c? Pause video now and have a little think.

Welcome back.

So which shows a cross-section diagram is, a, well done.

We're ready for our first task now.

Task A.

And I'd like you to discuss the three types of drawing methods we have just looked at, freehand sketching, cross-section diagrams and exploded diagrams. What is the difference between each one? When would each type be used? Pause video now and join me when you're ready.

Welcome back.

So you may have discussed these points.

Freehand sketching is drawing with no extra tools, such as rulers.

It is a quick way of getting designs on to paper.

Exploded diagrams show all the parts of an object separately, but in the correct position.

They're useful to see what parts are needed and how they fit together.

And cross-section diagrams show the inside of a product.

It is used to show the parts that cannot be seen from the outside.

Well done, everyone.

We're ready for second part of our lesson on isometric diagrams. Isometric diagrams are a way to draw 3D objects to scale on a 2D flat surface, showing three sides at once.

They're often used in architecture to show buildings and rooms in 3D, video games to create 3D-like environments in 2D, and product design to show objects from different angles.

So isometric drawings.

Isometric diagrams show 3D objects to scale, with shape sides drawn at 30-degree angles from the horizontal.

Ready for our next check for understanding now.

So from the horizontal, what angle are sides drawn in an isometric diagram? a, 180 degrees, b, 30 degrees, c, 90 degrees, or d, 360 degrees.

Pause video now and have a little think.

Welcome back.

So from the horizontal, what angle are sides drawn at in an isometric diagram are 30 degrees.

Well done, everyone.

Isometric diagrams are usually drawn using a special type of paper.

And the paper either uses dots or grid to help you draw lines at the correct angle.

Here is some isometric grid paper.

And this is isometric dot paper.

Isometric grid paper is usually used underneath plain paper as a guide, place the isometric paper underneath your plain paper.

Make sure the lines are running vertically, not horizontally.

And secure the paper with paperclips.

Isometric dot paper can be used underneath plain paper, in the same way as the grid paper, or you can draw directly onto it.

Lines should always be drawn using a ruler and sharp pencil or thin-tipped pen.

Andeep has practiced drawing a plastic building brick using both techniques, using the paper as a guide and drawing directly onto it.

"It's a bit like a dot-to-dot, but the lines have to be straight." That is a very good point, Andeep, well done.

For a challenge, Laura made a model letter L using plastic building bricks and practice drawing it as an isometric diagram.

"The dots help me to keep the bricks the same size every time, so the diagram is to scale." And that is very important.

Well done, Laura.

We're ready for our next check for understanding now.

And this is a true or false question.

So isometric diagram show you one angle or view of a product.

True or false? Pause video now and have a little think.

Welcome back.

So true or false? Isometric diagram show you one angle or view of a product is false.

Why? Brilliant.

Isometric diagram show you three dimensions or views of a product at once in a flat, 2D way.

We're now ready for Task B of isometric diagrams, and your first task is I want you to draw a single plastic building brick on isometric paper and you could choose dot or grid paper.

Try positioning the isometric paper under a sheet of plain paper.

And try drawing directly onto the isometric paper too.

Don't forget to use a sharp pencil and a ruler.

When you've completed that, your second task is to build a four-brick tower or simple model.

Use your preferred method from task one to draw an isometric diagram of it.

Take your time, be careful, and join me when you've completed task B.

Welcome back.

I hope you had lots of fun.

Took your time with careful drawing.

Brilliant.

Well, Andeep drew his single brick directly onto isometric dot paper.

But Laura challenged herself to draw her brick model herself.

How did you get on? You may wish to share yours with someone else.

We reached the end of our lesson for today on graphic designs and hope you've had lots of fun.

Let's have a look at our key learning points.

So exploded diagrams show how a product can be assembled and how the separate parts fit together.

Cross-section diagrams show the inside of something.

And isometric diagrams are usually at 30-degree angles.

And bricks can be drawn on isometric paper with a ruler.

Well, I hope you've had lots of fun, and I'll see you soon.

Bye!.