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MathXplosion, Ep 48: The most important thing when solving word problems

It's very important to read problems carefully so you can determine the important facts and understand the questions you are being asked to solve. You may find an answer using pictures and numbers, but if you didn’t answer the right question, what seems right can actually be wrong.

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MathXplosion, Ep 47: Creative problem solving

Have you ever had a problem you couldn't solve? Here's an idea: act it out! You can use puppets, objects or people to act out the problem by trying to do what the people or things in your problem do. It will help you because you are actually doing the problem!

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How is your personal information kept secret on the internet?

Lots of private data is exchanged over the internet. What are some examples? As Mia Epner explains, cryptography allows for the secure transfer of data online. How does encryption work? And what is a key? Today information is encrypted using 256 bit keys. This keeps information safe because it means there are way too many ...

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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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For the Juniors: Ramping up the fun

Join Winston as he tests which materials slide down a ramp. Which ones will slip and which ones will grip? He's testing a wooden block, a stone, a glass bottle and an eraser. Predict what will happen. Watch to see if your prediction was right.

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How 'binary information' is communicated via the internet

Ever wondered how your photos, emails and messages get sent between devices? Watch as software engineer Tess Winlock explains what binary information is, and how it gets from one place to another. Can you explain what 'bits' are? How about 'bytes'? In the past, binary information was sent using physical systems like semaphore ...

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Learning about computer languages

What happens when you type a web address or url into your computer and press enter? Watch this clip to find out! Computers and servers talk to each other in a language called HTTP. What are the messages they send and recieve mostly about? HTML is another language, one that tells a web browser how to make a web page look. ...

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Spark: A better way to predict the spread of bushfires

In recent years, new technologies have helped us respond to natural disasters more quickly by providing up-to-date information as it becomes available. What if we could take this one step further with new technologies that can also predict disasters? Learn how Spark, which uses our existing knowledge of bushfire behaviours ...

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Sam the Lamb: Does wool burn?

This short entertaining video, narrated by ‘Sam the Lamb’ and 'Professors' Madeleine and Daisy test which fabrics burn easily and which fabrics are the most flame resistant. Sam and his science team test the flammability of a range of synthetic and natural fabrics including polyester, polar fleece, cotton and wool.

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Sam the Lamb: needs of sheep

This short entertaining video, narrated by ‘Sam the Lamb’ and a wool-growing family show where their sheep live, what they eat and drink and how they ‘chew their cud’. Viewers will discover what a herbivore is, and how many stomachs sheep have. The video introduces rotational grazing and how farmers look after their sheep ...

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Catalyst: Can you solve the 'travelling salesman problem'?

Imagine you are a salesperson having to travel between multiple locations. How would you achieve this in the quickest way possible? This is a problem that has stumped mathematicians for decades, and there is even a prize for anyone who can come up with an algorithm to solve it. In this video, three methods are used to try ...

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Different types of telescopes

You can find both refracting and reflecting telescopes at Sydney Observatory. How are they different in the way they work and look? What can you find in nature that is like a telescope? Which type of telescope is it like?

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How to Use Scratch: Intro to Scratch 2.0

Want to make your own games? Scratch is a programming language, created by MIT, that makes it easy to create interactive art, stories, simulations, and games. Explore your ideas and share your creations online.

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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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How to Use Scratch: Changing Colours of objects in Scratch

Make the images and objects in your project change colour when they are clicked!

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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 ...

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How to Use Scratch: Adding Background Images

Make your project come alive by adding a backdrop - anything from a stage to a snow scene or, just draw your own.

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Unplugged Activity: What is computer science?

Do you know what a computer programmer does? Watch as some experts in the field explain. For more information on the activities introduced in this video, visit http://learn.code.org/s/1/level/1

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How do robots work?

Ever wondered how robots work? Watch as students and Robogals members Claire and Stefan introduce you to one of their robots. What does Claire say about robot languages? And what does Stefan say about how the robot knows what's in front of it?