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digital technologies
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what is digital technologies?
Digital technologies are electronic tools, systems, devices and resources that generate, store or process data. These include social media, online games and applications, multimedia, productivity applications, cloud computing and mobile devices.
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SCARY FACTS! There are 6.8 billion people on the planet and 4 billion of them use a mobile phone. Only 3.5 billion of them use a toothbrush. Every minute, 100 hours of video are uploaded on YouTube by individual users. Ninety percent of text messages are read within three minutes of being delivered. The average 21 year old has spent 5,000 hours playing video games, sent 250,000 s, instant messages, and text messages, and has spent 10,000 hours on a mobile phone alone. There are 350 million Snapchat messages sent every day. Of the 60 billion s that are sent on a daily basis, 97 percent are considered spam. The first alarm clock could only ring at 4am. Surgeons who grew up playing video games make 37% fewer mistakes. The average computer user blinks 7 times a minute, less than half the normal rate of 20. Americans throw away $60 million worth of gold and silver in the form of old phones. Your phone is dirtier than a public restroom toilet handle… The first handheld portable phone sold on March 13, 1984, for a whopping $3,995 We’re digital omnivores: 53% of all Australians own a tablet, laptop and smartphone.
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in the curriculum …so what technological devices do you use?
Australia finally has it’s digital technology curriculum which is mandatory for all Australian children from Foundation to Year 8. …so what technological devices do you use?
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what is it? digital footprint
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digital footprints Did you know that everything you do online leaves a trace? It’s true. It’s called a digital footprint, and while it may seem invisible to you right now, other people can see it, including your friends, family, your future college or employer, and even companies that want to sell you something.
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Where do you make your footprint? Who else is shaping your footprint?
in groups discuss: Where do you make your footprint? Who else is shaping your footprint? Are you in control of your footprint?
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what trace are you leaving behind?
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quick clip :)
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Individually you will…
create a circle with a logo of an online account you use. try to choose one that hasn’t already been picked.
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binary
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Does a computer communicate the same way that we do?
No. Deep down, a computer is translating every piece of information that it gets into its own simply processed language called binary
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What is binary? The binary number system is a base-2 number system. This means it only has two numbers: 0 and 1 The number system that we normally use is the decimal number system. It has 10 numbers 0-9
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Why use binary numbers? Binary numbers are very useful in electronics and computer systems. Digital electronics can easily work with a sort of “on” or “off” system where “on” is a 1 and “off” is a zero.
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Key words BINARY – A notation that utilizes only two options for each selection BIT – short for “Binary Digit”. It is one digit’s location in a binary number BYTE - a group of 8 binary digits or bits DECODE – convert a coded message into something familiar ENCODE – convert a familiar message into code ASCII – “American Standard Code for Information interchange” encoding of characters
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Who can remember how many digits are in a byte?
On the piece of paper, you will write 40 0’s and 1’s in any order. As neat as possible Hand up your piece of paper when you are done
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Create a table 9 columns 6 rows
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Decode: convert a coded message into something familiar
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video
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Friendly competition Groups of 5 (if 6 rotate every round)
Hold a binary card (16 dots, 8 dots, 4 dots, 2 dots, 1 dot) This a short byte When the number appears you need to work together to create that number
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Before we begin What binary digit is represented by the black side?
What binary digit is represented by the white side?
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5
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16 8 4 2 1
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16 8 4 2 1
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31
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16 8 4 2 1
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16 8 4 2 1
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Create another table 10 columns 6 rows
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ENCODE – convert a familiar message into code
My age: My street address: Number of people in my family: Number classroom: (your choice): CTRL + S
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Create your binary brick
Choose 1 familiar message to encode Open Room ? > Digital Technologies > binary brick – original Save as binary brick – your name Fill in your binary brick and print it off Cut it out and grab some blutak to put on a white brick in the corridor
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