1. Introduction to Computers
CLASS 6

2. Peripherals
 What’s a peripheral? Name the types of peripherals.
 What are these? Match the pictures with the words.
Mouse Monitor Keyboard Printer Earphones

3. More periperhals
 Here are a few more peripherals. See if you can match the words
with the pictures.
speakers scanner barcode reader joystick microphone
*Remember the word “barcode” - you’ll see it again later.

4. More periperhals
 Here are a few more peripherals. See if you can match the words
with the pictures.
microphone joystick speakers barcode scanner
reader

5. Input and output
input devices output devices

6. Wikiquestions
 Where does the word “Wikipedia” come from?
 When was Wikipedia started?
 How does Wikipedia make money?
 How popular is the Wikipedia website?
 Is Wikipedia a reliable source of information?

7. Wikiquestions
 Where does the word “Wikipedia” come from?
 “Wiki” and “Encyclopedia”
 When was Wikipedia started?
 2001
 How does Wikipedia make money?
 Donations only - no advertising.
 How popular is the Wikipedia website?
 Currently the worlds’ 6th most popular website.
 Is Wikipedia a reliable source of information?
 Studies show that Wikipedia is as reliable as major
encyclopedias [1]. You should still check with your teacher.

8. Internet Explorer is not good
 IE - it’s no good! If Microsoft didn’t include this web
browser with each copy of Windows, most people
wouldn’t use it.
 For today’s lesson, I will need you to check if you
have the Google Chrome browser.
 If you don’t have this browser, take a minute and
download it.
 Don’t know how to download it?
Google “Google Chrome”, silly!

9. What is this?
Have you seen these
pictures before?
What are they?
How can you use them?

10.  This is called a QR code.
 Most stores use a barcode system
QR codes
like this:
 QR ( Quick Response) codes can
hold much more information, and
anyone can use them.
 QR codes were created in 1994 by
a Toyota company to help track
car parts inside the factory.

11.  Barcodes can contain basic
information that can be read from
QR codes side to side.
 QR codes contain information that
runs up and down.
Barcodes can only hold
a few characters of data,
but QR codes can hold
thousands of characters.

12.  With all the data that QR codes
can hold, they are being used
All that data everywhere. Nearly all
smartphones (like the iPhone or
Android phones) have software
that can read QR codes.
 Advertisers love to use QR codes
because they can put URLs in
them, and get people to come to
their websites.

13.  You can see QR codes
Where can I everywhere:
see them?

14.  Go to qrcode.kaywa.com
Make your
own!  Choose the kind of QR code you want to
make.
You can make
your own QR
codes online  Download your finished QR code. You
can send it in email, post it on FB or
Twitter, or do whatever you want with it.
 If your phone has QR software, check to
see if it works!
 Try this link: http://blog.qr4.nl/Online-
QR-Code_Decoder.aspx

15. Twitter review
Hashtags mark topics.
Hashtags are marked by users
to make them easier to find.
Retweets are like
forwarded email.
Retweets help messages
spread between different
groups of users.
Current popular topics
are listed to the right of
your timeline.

16. This week:
 Give yourself a fancy new background:
1. Click on your head icon
2. Click on Settings
3. Click on Design

17. New Background
 Choose one of the designs Twitter provides, or try
out Themeleon.
 If you want to try uploading your own image:
Click Choose File
to upload your own
image.
There are lots of companies that provide images for twitter backgrounds.
They will even offer to install them for you. BE CAREFUL.

18. Why not let others see what I’m doing?
 Websites that offer things like free backgrounds,
smilies for chat, toolbars and other extras don’t
usually do it because they are nice.
 Companies exist to make money.
 Some companies make money honestly, others don’t.
 Let’s look at one example:
 twitrounds.com offers
free background pictures for your
twitter page.

19. Yay! Free stuff!
 I choose my favorite (so cute!):
 When I click on it, they offer to install it for me:
 If I choose this, they will:
 send a tweet to all my followers
 make my account follow them
 send junk mail for other sites
This site is honest because they at least
tell you directly what they will do.
Other sites can be much, much worse.

20. You Try
 Change the background of your twitter page.
 Do It Yourself - don’t let the webpage sign-in for you.
 You can use themeleon or some other place to find a
background (hint: search on google!)
 Find the one you like, add it, and let me see it.
 Remember - don’t sign up for anything, and try to
not download anything to your computer.