Hi, everyone.

I'm Mrs. Courts, and I'm very excited to join you for today's lesson on making our bridge structure.

This is part of the Frame Structures: bridges unit.

Our lesson outcome for today is I can make mockups of structures using different shapes and joining techniques.

We have four new keywords for our lesson today.

I'll say them first and then you say them after me.

Are you ready? Joining techniques, joining techniques.

Super.

Joining techniques are ways to join two things together correctly.

Building, building.

Super.

Building is making something new with different materials.

Reinforce, reinforce.

Super.

Reinforce means to strengthen or support an object or a structure.

And our final word is testing, testing.

Super.

Testing means trying something to see if it works and to make changes or improvements to it.

Well done, everyone.

In our lesson today, we have two learning cycles and our first learning cycle is joining materials.

It's very important to think about how you will join the materials to make your bridge structure.

Izzy says, "a joining technique is a way to join two materials together correctly." Well done, Izzy.

These are all joining techniques.

Some work better than others with different materials.

Double-sided tape, glue stick, masking tape, PVA glue, staples, sticky tape.

You might recognise all of these.

Double-sided tape is a type of tape that stick you on both sides.

Izzy says, "It can be quite tricky to use.

Only peel the backing strip when the objects are ready to be stuck." Masking tape.

This type of tape is easier to tear and to remove.

Izzy says, "It can blend into objects when painted and decorated, and it's easy to cut with scissors.

But sometimes, it isn't as strong as other tapes." PVA glue is a white, runny glue used to sticking paper and card.

And Izzy says, "It does dry clear and is quite strong, but can be very messy.

Use a little bit at a time; and a thin layer is all you need." This is a glue stick.

It's a solid tube of glue.

It dries quickly and it's not too messy and easy to use, but it is not as strong as PVA glue.

When using the tissue paper, put the glue on the surface first, and then add the tissue paper.

It's also a little bit easier to do that with the runny PVA glue too.

We are ready for our first check for understanding.

So, which of the following joining techniques use glue? Is it A, B, or C? Pause the video now and have a little think.

Welcome back.

So, which of the following joining techniques use glue? It is A and B.

The A is runny PVA glue and B is the glue stick.

Well done.

Staples are small metal clips used in a stapler to fasten paper or card together.

Jun said, "It is very quick and easy to use, but can be sharp so be careful.

Your teacher might need to help you." Sticky tape is a clear tape that is used to join paper and card and other materials.

Jun said, "Sticky tape is quick to use and strong, but cannot be decorated.

It can be a little tricky to use and difficult to cut." We're ready for our next check for understanding now.

So, true or false, a joining technique is where shapes are cut with scissors.

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

Welcome back.

So, true or false, a joining technique is where shapes are cut with scissors is false.

Why? Brilliant.

Joining techniques are how materials are joined together.

They stop the materials from coming apart easily.

Well done.

We are ready for our first task now, Task A.

Which joining techniques will you use when making your bridge? Test them out and put them in order of preference.

Double-sided tape, glue stick, masking tape, PVA glue, staples, and sticky tape.

So, which would you use for making your bridge? Test them out and put them in order of preference.

Pause the video now and complete Task A.

Welcome back.

So, by now, you should have had a look at these joining techniques and had a go and see which one you preferred.

Well, Izzy and Jun explored the different joining techniques and put them in order of their preferences to use in their making task.

They said first, they'd use a glue stick.

Their second favourite was PVA glue.

Their third was double-sided tape.

Their fourth was masking tape.

Their fifth was sticky tape.

And finally, staples.

We're now ready for our second part of our lesson and this is building a bridge structure.

To make bridge, Jacob has completed a design specification with his Oak class.

And then, he explored different types of bridges and ways to make them.

He then explored ways to reinforce to make things stronger and joined materials together.

And finally, he sketched his ideas and chose his favourite one.

Well done, Jacob.

Lots of hard work there.

Jacob chose his materials and talked about joining techniques with his friends.

And Jacob's now ready to build his bridge.

Here's Jacob's design.

He decided he will use a toilet roll tube or toothpaste boxes.

He'd use thin curved cardboard for the arch.

His foundations might be stick tubes or boxes to make the base.

And he'd use reinforced cardboard.

Folded card to hold a ramp in place.

And finally, reinforced card using straws.

Are you ready to build your bridge? To make a bridge, we'll be using scissors to cut card and other materials.

Scissors are a tool so we need to remember to hold them carefully, sit down when cutting, and only cut paper and card and materials for your project with the scissors.

To make the bridge structure, you will need joining techniques, the ones that you've chosen.

Scissors, recyclable materials, paper and card of different sizes and thicknesses, and cardboard straws.

Testing is a way of checking whether something works.

And engineers test materials, joining techniques, and strength before they build a bridge.

During the building, however, they continue to test the bridge.

This helps the designer to fix any problems and to spot any safety issues.

Alex says, "Testing whilst the bridge is being built allows the engineer to fix any problems." That's a very good point, Alex.

We are ready for our check for understanding.

And this is a true or false question.

Engineers only test their bridges once they're built.

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

Welcome back.

So, true or false, engineers only test their bridges once they're built is false.

Why is it false? Brilliant.

Engineers test materials, joining techniques, and strength before they build a bridge.

However, during the building, they continue to test the bridge.

And this helps the designer to fix any problems and to spot any safety issues.

To test your bridge when you are building, you might answer these questions.

When joining pieces together, do they hold? Is your bridge freestanding? And is your bridge strong and sturdy? Alex says, "Remember, testing whilst building means you can spot any issues." We are ready for our next check for understanding.

Hope you're sitting comfortably.

Brilliant.

Our bridge needs to be, A, strong and sturdy, B, big and tall, or, C, freestanding and not wobble.

Pause the video now and answer the question.

Welcome back.

So, a bridge needs to be strong and sturdy and freestanding and not wobble.

Well done, everyone.

Alex reminded Jacob about testing his bridge and Jacob realised that this is a very important part of building the structure for his bridge.

Jacob thought about the question, is your bridge freestanding? Jacob said, "I can make a wider base for my bridge." That's a really good idea, Jacob.

Well done.

I can make a wider base and I could use toilet roll tubes, but by cutting the bottom of a tube is another way to make a wider base.

And this can then be glued down to some cards.

Jacob, you could also cut the bottom of boxes and do the same idea of cutting around, and then glueing those down.

We're ready for our final task now, Task B.

And I'd like you to make your bridge structure using recyclable materials.

Remember to make the base wider, add strength using card pieces, and finally make strong triangle shapes and join them together using shell structures, such as straws.

Pause the video now and complete Task B.

Welcome back.

Have you managed to complete your bridge? Brilliant.

Well, Jacob built his bridge structure and here it is.

He used a toilet roll tube or toothpaste boxes.

He used thin curved cardboard for the arch.

And his foundations, he cut boxes and take them down.

And he reinforced the cardboard to get onto the bridge.

And he folded the card to hold the ramp in place.

And he reinforced the card using straws.

Did you enjoy making your bridge? Have you had lots of fun? Have you shared your bridge with your friends? Brilliant.

Well, Jacob enjoyed making his bridge structure.

He reinforced it by making the wider base.

He added strength using card pieces.

He started to use triangles and straws to make the structure strong and to form the bridge.

And finally, between each stage of the making, he tested the bridge was strong, sturdy, and freestanding.

Did you remember to test your bridge during the making stages? Brilliant.

We've reached the end of our lesson for today and hope you've had lots of fun making your bridges.

I wonder if you'd show me a thumbs up if you feel you've met these learning points.

Super.

Experimenting with mockups helps develop designs.

Super.

It is important to use the correct glue and/or tape when making.

Brilliant.

And minimal, a small amount of glue is needed when joining materials together.

Excellent.

Masking tape can be used to join most materials and be painted over, but it can also rip easily.

Super.

And finally, testing throughout the making process is very important.

Brilliant.

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

And I'll see you again soon.

Bye.