8S2b Period 3 Tuesday 30th June 2015

lesson 1 continued…

TASK 2 – The structure of a URL.

Open worksheet UNIT 6 LESSON 1 TASK 2 TEXT. Add your name to the header. Save it into your Unit 6 How the web works folder.

Work in your groups. Read through “What is a URL?” in the worksheet UNIT 6 LESSON 1 TASK 2 TEXT. Use the highlighter tool to pick out the key concepts introduced in this document.

COMPUTE IT 616

Open worksheet 61C Reconstructing paths. Add your name to the header. Save it into your Unit 6 How the web works folder.

Read the descriptions of the URLs of several imaginary web pages and reconstruct their likely web addresses. Then state whether the pages are dynamic or static.

For example, about.html was downloaded from www.bigserver.co.uk via the HTML protocol. It was stored on that server in a folder called ‘projects’, which was, in turn, located in a folder called ‘public’. This becomes: www.bigserver.co.uk/public/projects/about.html. It is a static page.

Now complete the examples on the worksheet.

COMPUTE IT 617

There are companies on the web that offer a service to shorten URLs so that you don’t have to remember long strings of letters and numbers. They work by adding the URL to a list and then returning a shortened “alias” URL such as http://tinyurl.com/pr433fn If the service has previously received a request to shorten a URL, then it will return the existing shortened alias URL rather than creating a new, duplicate, alias. Go to http://tinyurl.com and follow the instructions to enter a long URL of your choice and see what comes out.

EXAMPLE

Long URL Short alias URL  
www.bigserver.co.uk/public/projects/about.html This is 57 characters long. http://tinyurl.com/nms2cc7 This is 26 characters long.

EXTENSION

THINK IT 612

Work in your groups. Grab a white board, pen and cloth. List as many devices as you can that connect to the internet. Which ones involve the world wide web?

REMEMBER – The internet is a network of servers and communication infrastructure that delivers a range of services. The world wide web is a system of interlinked documents which are located on the internet. The world wide web is just one part of the internet.

Watch the video World Wide Web in Plain English – http://www.commoncraft.com/video/world-wide-web   This summarises the main points about the internet and the world wide web.

Open worksheet 61D – The world wide web in plain English. Add your name to the header. Save it into your Unit 6 How the web works folder.

Answer the following questions on the worksheet The world wide web in plain English. Give yourself a score. Add up your marks when you are finished.

UNIT 6 LESSON 2 How do we know what to trust on the web? 

STARTER – Bogus websites

Work in your groups. Grab a white board, pen and cloth. Jot down some notes on your experience of bogus (unreliable and / or untrustworthy) web pages.

Click on the link Bogus Websites – http://publish.uwo.ca/~floyd/general/boguswebsites.htm

Open worksheet UNIT 6 LESSON 2 Indicators of bogus websites. Add your name to the header. Save it into your Unit 6 How the web works folder. Work in your groups. Take a look at the links on the worksheet. For each bogus website tick all of the indicators that you think apply to that site and indicate that it is a bogus website.

  1. Velcro crop
  2. Dihydrogen monoxide
  3. Male pregnancy
  4. Order your child
  5. Buy an ancestor online
  6. Fisher-Price airplane
  7. Camera monitor
  8. Me and my vacation
  9. Editing digital images

THINK IT 621

Work in your groups. Grab a white board, pen and cloth. What makes it possible to create bogus websites?

THINK IT 622

Work in your groups. Grab a white board, pen and cloth. How do you stay safe on the web and avoid bogus web sites?

TASK 1 – Evaluating content on the web.

THINK IT 625

Work in your groups. Grab a white board, pen and cloth. How accurate do you think Wikipedia is as a source of information?

Open the PowerPoint 62A Evaluating Quality.

COMPUTE IT 626

Open worksheet Evaluating content on the web. Add your name to the header. Save it into your Unit 6 How the web works folder. Use the highlighter tool to pick out the key concepts introduced in this document.

Go to Aggregator site – dig.com – http://digg.com/ or Aggregator site – reddit.com – http://www.reddit.com/ These are aggregator sites which collect together interesting web pages from around the world that have been submitted by members. Choose FIVE featured web sites and evaluate their quality.

THINK IT

Work in your groups. Grab a white board, pen and cloth. Is it possible to create a completely trustworthy and unbiased resource? How far is this a valid aim?

TASK 2 – How long does content live on the internet?

Content lives way beyond its intended life span on the internet. This can impact the relevance of web pages found while searching the internet. It might even impact on a person’s long-term future if they post things they might later become embarrassed about!

COMPUTE IT 628

Open and read PowerPoint 62B Currency of Websites. Add your name to the header. Save it into your Unit 6 How the web works folder.

Open worksheet 62A Evaluating quality. Add your name to the header. Save it into your Unit 6 How the web works folder. NOTE: You will need a new copy of this worksheet for every website you evaluate, so remember to name them 62A Evaluating quality1 NAME the WEBSITE, 62A Evaluating quality2 NAME the WEBSITE, etc.

Work in your groups. Grab a white board, pen and cloth. Geocities was the first giant online community when it was launched in 1994. When it was closed down in 2009, a project archived it so you could see it as it was. Search for “geocities archive project” and have a look around. What has changed and why?

THINK IT 629

Open the link and read the Telegraph article – Young will have to change names to escape ‘cyber past’ warns Google’s Eric Schmidt – http://www.telegraph.co.uk/technology/google/7951269/Young-will-have-to-change-names-to-escape-cyber-past-warns-Googles-Eric-Schmidt.html  

To summarise in 2010, the telegraph reported the following:

“Mr Schmidt (Eric Schmidt of Google) said he believed that every young person will one day be allowed to change their name to distance themselves from embarrassing photographs and material stored on their friends’ social media sites”.

NOTE – Some companies now search for an interviewee online and check their Facebook profiles before hiring them.  Is there anything about you on the web that might cost you a job in the future?

For a relatively recent example of how someone’s web past can come back to haunt them open the link and read the BBC news article – Paris Brown: Kent youth PCC resigns after Twitter row – http://www.bbc.co.uk/news/uk-england-22083032

EXTENSION – Body popping

Open PowerPoint 62C Body popping gestures.

I am going to read a list of statements. Perform one of the following gestures when you have identified the statements read out as:

  • Bias: Lean to the side
  • Fact: Thumbs up
  • Opinion: Palms to mouth as if shouting through a megaphone
  • Bogus: Thumbs down
  • Outdated: Wave the hand as if saying goodbye

COMPUTE IT 623

Google provides guidance on how to create effective, high quality websites. Search for “Google quality guidelines” and you will find a list of practices it encourages you to avoid. WEBMASTER GUIDELINEShttps://support.google.com/webmasters/answer/35769?hl=en#3

Follow the links in the list. Create a Word document called Google quality guidelines. Add your name to the header. Save it into your Unit 6 How the web works folder.

In your document, note down each good practice. Then for each practice, note down whether you have ever visited websites that does NOT follow their advice. Can you remember how you ended up at those websites?

Find tool in Browser. 

Open worksheet 62C Searching web pages. Add your name to the header. Save it into your Unit 6 How the web works folder. Read the instructions 1, 2 and 3, then try to answer question 4.

A browser contains a very useful feature called Find, which locates a web page for the word or phrase which you type into it. It even tells you the number of times that word occurs on the page. This is a very quick and easy way of working out if a web page will help you in your research. If it doesn’t contain appropriate key words, it is unlikely to help you.

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