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How to Use Scratch: Creating an interactive Holiday Card Activity

Looking for a simple project to get you started in Scratch? Add characters, animate them, create and share your own interactive Holiday Card.

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Growing carbon nanotubes

Carbon nanotubes are a very tiny but super strong material used in manufacturing to create strong, lightweight products. Besides sporting equipment, find out what other kinds of products are made using these tiny molecules. What other qualities (besides size and strength) do carbon nanotubes have that makes them even more ...

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Getting satellite design right

Is it a good idea to build a complex and expensive machine without carefully checking the design first? This animated clip describes some of the steps NASA took during the design review process for the development of a new satellite. Can you think of any other steps in design reviews?

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Catalyst: Hemp is not a weed!

You may have heard about the cannabis plant and its use as the drug marijuana. But did you know it has two main varieties, one of them commonly called hemp? See how hemp differs from its 'cousin'. Find out more about the characteristics of hemp that make it a 'green' crop with plenty of potential.

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For the Juniors: How planes take off and fly

A modern jet aeroplane is big and heavy, so how does it fly? In this clip we explain how the wing shape helps a plane to take off and fly. Also see how a plane's jet engine works. Is it all a load of hot air?

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Building a weather satellite

Designers and engineers improve upon existing products all the time. How important do you think it is to update and enhance something like a weather satellite? Can you think of some other objects that could be improved upon?

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How do computers get hacked?

What are some examples of cyber crime? Watch this clip to find out how viruses, denial of service attacks (DDoS) and phishing scams work. What is a botnet? And how are they used by hackers to bring down websites? Most of the time computers get hacked because of simple mistakes users make. What can users do to better protect ...

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Engineering clean rivers

Figuring out how to clean up contaminated rivers is a big challenge. It's also tricky to work out where the most contaminated parts of a river system are and whether its fish are safe to eat. Watch this video and learn how engineering has helped to solve these problems. Why do you think engineers looked to the bottom of ...

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Learning from design 'mistakes'

Finding the solution to a design problem involves generating creative ways to address a need or difficulty. Design is the key and it often involves an engineer. In this clip, explore what an engineer is and what they do, and see an example of how NASA engineers might plan, create and test an idea to fix a space station.

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What are IP addresses?

Meet Vint Cerf, the co-creator of the internet! In this clip, Vint and software engineer Paola Mejia explore the way computer networks talk to each other. Find out what an IP address is and why it's similar to a street address. What's the domain name system? And how does your computer find out the IP address of a website ...

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What makes these paper planes fly?

Have you ever wondered what makes a paper plane fly? Think about the design of the paper plane as well as external factors like the various forces that are at play, then make a list of the design considerations and a list of the different forces.

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Reverse engineering

This series of short videos from Khan Academy deconstruct and explain the way household items are designed and how they work including a digital alarm clock radio, a coffee maker, a tap light (a toggle switch light), a hair dryer, a DVD player, a universal remote and a digital camera.

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Imagining other uses for robotics technology

It's cool to program robots to play football, but there are many more useful applications for programming robots to react to what they are seeing. What are some of the examples David McKinnon gives? Can you think of some more examples?

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Telling robots what to do

If you were programming a robot to play a competitive game of soccer, what are some of the things you would consider? Think about some of the most basic functions of a robot, like walking, stopping and turning, to more complicated functions like recognising objects and reacting to them in a specific way.

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How to Use Scratch: Making Sprites interactive

Make your Sprite jump, move, say something or change costume.

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Why every day should be Hour of Code day

Doncaster Gardens Primary School students participating in Hour of Code tell us what they love about learning coding and programming, and why they think it's important to learn for their futures. Their teacher, Carey Baldwin, offers some great starting points for both teachers and students to improve their skills – at any ...

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Catalyst: Shining the light on a more sustainable globe

Artificial lighting methods have changed with the invention of new lighting technologies designed to be more energy efficient and to reduce the use of resources. Since electricity has been used as an energy source, incandescent and fluorescent globes and, more recently, light emitting diodes (LEDs) have been used in our ...

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How to Use Scratch: Adding a Sprite

So, you have your new project in Scratch - now it's time to add a Sprite!

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How to Use Scratch: Making a Sprite say something

You don't want a silent Sprite! Get your Sprite to talk by using the 'say' block.

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Hour of Code: Saloni on the If/Else block

The Hour of Code is a one-hour introduction to computer science, designed to demystify code and show that anybody can learn the basics. In this video, Saloni explains what an If/Else statement is and looks at how If/Else blocks can be used to program the movement of a zombie character. This is the fifth of seven clips in ...