Trekking through the world of information


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  • Trekking through the world of information

    1. 1. Image: 'flickr time' Trekking through the World of Information Effective Search Strategies for Teachers
    2. 2. Definition of the Net The Internet is the publicly accessible worldwide system of interconnected computer networks that transmit data by packet switching using a standardized Internet Protocol (IP). It is made up of thousands of smaller commercial, academic, domestic and government networks. It carries various information and services, such as electronic mail , online chat , and the interlinked web pages and other documents of the World Wide Web .
    3. 3. How big is the web? <ul><li>56 billion static web pages are publicly available on the World Wide Web. </li></ul><ul><li>Another estimated 6 billion static pages are available within private intranet sites </li></ul><ul><li>200+ billion database-driven pages are available as dynamic database reports (&quot;invisible web&quot; pages) </li></ul><ul><li> indexes 9.75 billion web pages. </li></ul>Image: 'Released to Public: Sinai Penninsula and Dead+Sea+from+Space+Shuttle+Columbia,+March+2002+(NASA)'
    4. 4. Today <ul><li>200 billion pages </li></ul><ul><li>Only 50 Billion is static web </li></ul><ul><li>Google has only indexed 20% </li></ul><ul><li>Daily Web Space increases by 100,000 websites </li></ul>Image: 'LOGO2.0 part I'
    5. 5. Search Strategy <ul><li>Choose appropriate key words </li></ul><ul><li>Select right tools </li></ul><ul><li>Evaluate Information </li></ul>Image: 'http://www'
    6. 6. Searching the Free Web Image: 'PSP Browser vs Landscape Dell X50v’ <ul><li>Use Advanced Searching </li></ul>
    7. 7. A few search engines
    8. 8. Metacrawler
    9. 10. Boolean Searching Add +ABC Minus -ABC Default DEF OR ABC Exact phrase “ABC” Wild card ABC* Synonym ABC~
    10. 11. Samples                                                       OR NOT AND
    11. 12. Deep Web <ul><li>The invisible web is a vast repository of information that search engines don't have access to, such as databases </li></ul><ul><li>Private networks, called intranets, that are not actually hooked up to the Web </li></ul><ul><li>Forms , like ColdFusion or CGI </li></ul><ul><li>Password-protected sites , like a university library </li></ul><ul><li>Sites that intentionally, for various reasons, keep their information from being indexed by search engine spiders </li></ul>Image: 'Andromeda, again.'
    12. 13. Effective habits: <ul><ul><li>What do others like? </li></ul></ul><ul><ul><li>Use The &quot;Three Strikes&quot; Rule </li></ul></ul><ul><ul><li>Don't Play Favorites </li></ul></ul><ul><ul><li>Use Specialized Search Sites </li></ul></ul>Image: 'no denial'
    13. 14. Web Evaluation Techniques Before you click to view the page... <ul><li>Look at the URL - personal page or site ? ~ or % or users or members </li></ul><ul><li>Domain name appropriate for the content ? edu, com, org, net, gov,, uk, etc. </li></ul><ul><li>Published by an entity that makes sense ? </li></ul><ul><ul><ul><li>News from its source? </li></ul></ul></ul><ul><ul><ul><ul><ul><li> </li></ul></ul></ul></ul></ul><ul><ul><ul><li>Advice from valid agency? </li></ul></ul></ul><ul><ul><ul><ul><ul><li> </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li> </li></ul></ul></ul></ul></ul><ul><ul><ul><ul><ul><li> </li></ul></ul></ul></ul></ul>
    14. 15. Web Evaluation Techniques Scan the perimeter of the page <ul><li>Can you tell who wrote it ? </li></ul><ul><ul><ul><li>name of page author </li></ul></ul></ul><ul><ul><ul><li>organization, institution, agency you recognize </li></ul></ul></ul><ul><ul><ul><li>e-mail contact by itself not enough </li></ul></ul></ul><ul><li>Credentials for the subject matter ? </li></ul><ul><ul><li>Look for links to: </li></ul></ul><ul><ul><li>“ About us” “Philosophy” “Background” “Biography” </li></ul></ul><ul><li>Is it recent or current enough ? </li></ul><ul><ul><ul><li>Look for “last updated” date - usually at bottom </li></ul></ul></ul>
    15. 16. Web Evaluation Techniques Indicators of quality <ul><li>Sources documented </li></ul><ul><ul><ul><li>links, footnotes, etc. </li></ul></ul></ul><ul><ul><ul><ul><li>As detailed as you expect in print publications ? </li></ul></ul></ul></ul><ul><ul><ul><li>do the links work ? </li></ul></ul></ul><ul><li>Information retyped or forged </li></ul><ul><ul><ul><li>why not a link to published version instead ? </li></ul></ul></ul><ul><li>Links to other resources </li></ul><ul><ul><ul><li>biased, slanted ? </li></ul></ul></ul>
    16. 17. Web Evaluation Techniques What Do Others Say ? <ul><li>Search the URL in </li></ul><ul><ul><li>Who links to the site? Who owns the domain? </li></ul></ul><ul><ul><li>Type or paste the URL into the basic search box </li></ul></ul><ul><ul><li>Traffic for top 100,000 sites </li></ul></ul><ul><li>See what links are in Google’s Similar pages </li></ul><ul><li>Look up the page author in Google </li></ul>
    17. 18. Web Evaluation Techniques STEP BACK & ASK: Does it all add up ? <ul><li>Why was the page put on the Web ? </li></ul><ul><ul><ul><li>inform with facts and data? </li></ul></ul></ul><ul><ul><ul><li>explain, persuade? </li></ul></ul></ul><ul><ul><ul><li>sell, entice? </li></ul></ul></ul><ul><ul><ul><li>share, disclose? </li></ul></ul></ul><ul><ul><ul><li>as a parody or satire? </li></ul></ul></ul><ul><li>Is it appropriate for your purpose? </li></ul>
    18. 19. Try evaluating some sites... <ul><li>Search a controversial topic in Google: </li></ul><ul><ul><li>&quot;nuclear armageddon&quot; </li></ul></ul><ul><ul><li>prisons danger </li></ul></ul><ul><ul><li>“ stem cells” abortion </li></ul></ul><ul><li>Scan the first two pages of results </li></ul><ul><li>Visit one or two sites </li></ul><ul><ul><li>try to evaluate their quality and reliability </li></ul></ul>
    19. 20. Other Internet Politics <ul><li>Copyright, Fair Use & Plagiarism </li></ul><ul><li>Where did the info come from? </li></ul><ul><ul><li>public domain? creative commons? </li></ul></ul><ul><ul><li>Giving credit </li></ul></ul>
    20. 21. Citation Generator
    21. 22. http: //theconnectedclassroom . wikispaces . com/Digital_Images What about images?
    22. 24. Why Use NetTrekker? <ul><li>Searches are Academically relevant </li></ul>Image: 'Questions'
    23. 25. Why Use NetTrekker? <ul><li>Educator reviewed & evaluated </li></ul><ul><li>Aligned to state standards </li></ul><ul><li>Read Aloud </li></ul><ul><li>Rated by readability level </li></ul>Image: 'question mark ?' Image: 'question mark ?'
    24. 26. Register Create User Name Passcode & enter YOUR IU’S Keyword
    25. 27. Regular Logon
    26. 32. <ul><li>Keyword </li></ul><ul><ul><li>Web </li></ul></ul><ul><ul><li>Persons </li></ul></ul><ul><ul><li>Images </li></ul></ul><ul><ul><li>Standards </li></ul></ul><ul><li>Drill down through headings </li></ul><ul><li>Timeline </li></ul><ul><li>Elementary – Theme Search </li></ul>
    27. 33. Let’s Start Searching!
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