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Educational Technology Lecture EME2040

Educational Technology Lecture EME2040

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    Chap02 Chap02 Presentation Transcript

    • Chapter 2 Communications, Networks, the Internet, and the World Wide Web
    • CHAPTER 2 OBJECTIVES
      • Define communications
      • Identify the basic components of a communications system
      • Describe how and why network computers are used in schools and school districts
      • Explain how the Internet works
    • CHAPTER 2 OBJECTIVES
      • Describe the World Wide Web portion of the Internet
      • Explain how Web documents are linked to one another
      • Explain the use of Web browser software
      • Explain how to use a Web search tool to find information
    • CHAPTER 2 OBJECTIVES
      • Identify several types of multimedia products available on the Web
      • Explain how Internet services such as e-mail, newsgroups, chat rooms, and instant messaging work
      • Describe the educational implications of the Internet and the World Wide Web
      • Describe different ways to connect to the Internet and the World Wide Web
    • WHAT IS COMMUNICATIONS?
      • A process in which two or more computers or devices transfer data, instructions, and information
      • Sometimes called telecommunications
    • WHAT IS COMMUNICATIONS?
      • Electronic mail (e-mail)
      • Voice mail
      • Fax (facsimile)
      • Telecommuting
      • Online services
      • Videoconferencing
      • Internet
      • World Wide Web
    • COMMUNICATIONS NETWORKS
      • Basic communications system
        • Two computers, one to send and one to receive data
        • Communications devices that send and receive data
        • A communications channel over which data is sent
    • A COMMUNICATIONS SYSTEM
    • COMMUNICATIONS NETWORKS
      • Communications channel
        • Transmissions media
          • Twisted-pair cable
    • COMMUNICATIONS NETWORKS
        • Digital vs. analog signals
          • Modem
            • External modem
            • Internal modem
          • Network interface cards
    • COMMUNICATIONS NETWORKS
      • Local Area Networks (LAN)
        • Covers limited geographical area
        • Server manages resources
      • Wide Area Networks (WAN)
        • Covers large geographical area
        • Can consist of several LANs
    • COMMUNICATIONS NETWORKS
      • Home Networks
        • Connects multiple computers in your home
        • Share Internet access and resources
    • NETWORKING THE CLASSROOM, SCHOOL, AND DISTRICT
      • School network server
      • Example classroom
        • Three Macintosh computers
        • Printer
    • NETWORKING THE CLASSROOM, SCHOOL, AND DISTRICT
      • Example school network
        • Classrooms
        • Administration
        • Computer lab
      • Example school district
        • Central office
        • Various schools
    • SCHOOL’S LOCAL AREA NETWORK
    • DISTRICT’S WIDE AREA NETWORK
    • WIRELESS SCHOOLS AND CLASSROOMS
      • Keep in touch with family and friends from anywhere
        • Smart pagers
        • Cellular telephones
        • Handheld computers
        • Notebook computers
      • Wireless technology brings the computer lab to students
    • HIGH SPEED OR BROADBAND ACCESS
      • Government works to provide high speed Internet access to classrooms
      • Broadband technology transmits signals at much faster speeds
    • THE BENEFITS OF COMPUTER NETWORKS IN EDUCATION
      • Sharing of computer hardware, software, and data resources
      • Unlimited educational resources
      • Communicate with other educators and students
    • WHAT IS THE INTERNET?
      • Worldwide group of connected networks that allow public access to information and services
      • No single organization owns or controls
      • Estimated 500 million users
      • Variety of uses
    • The world’s largest network is the Internet, which is a worldwide collection of networks that link together millions of businesses, governments, educational institutions, and individuals.
    • HISTORY OF THE INTERNET
      • Started as a network of four computers at in both California and Utah in 1969
      • Advanced Research Projects Agency (ARPA) - ARPANET
      • More than 35 million computers today
      • Backbone first provided by National Science Foundation (NSF) - NSFnet
    • HISTORY OF THE INTERNET
    • HISTORY OF THE INTERNET
      • Backbone now provided by variety of corporations
      • Various organizations help define standards
      • Internet2 (I2)
        • Extremely high-speed network
        • Develop and test latest Internet technologies
        • Members include over 190 universities in the United States, along with 60 companies and the United States government
    • HOW THE INTERNET WORKS
      • Data is divided into packets
      • Routers send packets across the Internet
      • Packet switching
      • Transmission control protocol/Internet protocol (TCP/IP) is the communications protocol used by the Internet
    •  
    • HOW THE INTERNET WORKS
      • Internet Service Providers versus Online Service Providers
        • Have permanent connections to the Internet
        • Provide temporary connections to individuals and companies for a fee
        • Local and national ISPs
        • Online service providers offer members only areas
    • HOW THE INTERNET WORKS
      • Connecting to the Internet
        • Business or school network connected to the Internet
        • Dial-up access
        • ISDN
        • Cable TV (CATV)
        • Digital subscriber line (DSL)
    •  
    • HOW THE INTERNET WORKS
      • The Internet Backbone
        • Acts as a highway
        • Local ISPs connect through leased lines to national ISPs
    •  
    • HOW THE INTERNET WORKS
      • Internet Addresses
        • Numeric addresses
        • Domain name
          • Domain type abbreviations
          • Country code abbreviations
    •  
    • THE WORLD WIDE WEB (WWW)
      • Started in the early 1990s
      • Hyperlinks
      • Uniform Resource Locator (URL)
      • Hypertext transfer protocol
    • THE WORLD WIDE WEB (WWW)
    • THE WORLD WIDE WEB (WWW)
      • How a Web Page Works
        • Hypertext
        • Hyperlinks
          • Target
          • Relative
          • Absolute
    • THE WORLD WIDE WEB (WWW)
        • Discovery learning
        • Web Surfing
        • Webmaster
        • Hypertext markup language (HTML)
        • Web publishing
    • THE WORLD WIDE WEB (WWW)
      • Web Browser Software
        • Interprets HTML and displays Web pages and enables you to link to other Web pages and Web sites
    • THE WORLD WIDE WEB (WWW)
      • Web Browser Software
        • Mosaic
        • Netscape Navigator
        • Microsoft Internet Explorer
    • THE WORLD WIDE WEB (WWW)
      • Searching for Information on the Web
        • Directory maintained by a search engine company
        • Helps find information on the Web
        • Search engine
        • Subject directory
    • THE WORLD WIDE WEB (WWW)
      • Multimedia on the Web
        • Web pages incorporate graphics, animation, audio, video, and virtual reality
        • Plug-ins
    • THE WORLD WIDE WEB (WWW)
      • Multimedia on the Web
        • Graphics
          • Used to enhance text-based Internet
    • THE WORLD WIDE WEB (WWW)
      • Multimedia on the Web
        • Graphics
          • Graphics formats
    • THE WORLD WIDE WEB (WWW)
      • Multimedia on the Web
        • Graphics
          • Thumbnails
    • THE WORLD WIDE WEB (WWW)
      • Multimedia on the Web
        • Animation
          • Marquees
          • Animated GIFs
    • THE WORLD WIDE WEB (WWW)
      • Multimedia on the Web
        • Audio
          • MP3 format
            • MP3 player
          • Streaming audio
          • RealAudio
    • THE WORLD WIDE WEB (WWW)
      • Multimedia on the Web
        • Video
          • Streaming video
          • RealVideo
    • THE WORLD WIDE WEB (WWW)
      • Multimedia on the Web
        • Virtual Reality
          • Simulation of real or imagined environment that appears as a three-dimensional (3-D) space
          • VR worlds
    • This instructional Web site uses VR to teach biology students about cells and body tissues.
    • OTHER INTERNET SERVICES
      • E-mail
        • Primary communication method for both personal and business use
        • E-mail programs
          • Mailbox
          • Mail server
        • E-mail address
          • User name
    • OTHER INTERNET SERVICES
      • FTP (file transfer protocol)
        • FTP sites and servers
        • Allows file downloads and uploads
        • Anonymous FTP
        • FTP programs
    • OTHER INTERNET SERVICES
      • Newsgroups and Message Boards
        • Newsgroup – online area in which users conduct written discussions about a particular subject
          • Usenet
        • News server
        • News reader
        • Article
        • Posting
        • Threaded discussion
    • OTHER INTERNET SERVICES
      • Newsgroups and Message Boards
        • Message Boards – easier to use than newsgroups
    • OTHER INTERNET SERVICES
      • Mailing Lists
        • Group of e-mail names and addresses given a single name
        • Subscribing and unsubscribing
        • LISTSERVs
    • OTHER INTERNET SERVICES
      • Chat Rooms
        • Real-time conversation
        • Chat rooms
        • Chat clients
          • IRC (Internet relay chat)
          • Microsoft Chat
    •  
    • OTHER INTERNET SERVICES
      • Instant Messaging
        • See when one or more people are online
        • Exchange messages and files
        • Join a private chat room
      • Short Message Service (SMS)
        • Send and receive text messages from Web-enabled devices
    • NETIQUETTE
      • Internet etiquette
        • The code of acceptable behaviors users should follow while on the Internet
    •  
    • INTERNET SECURITY
      • Firewall
      • Filtering software
      • Acceptable Use Policy (AUP)
    • THE IMPACT OF THE INTERNET AND THE WORLD WIDE WEB ON EDUCATION
      • The Web is the Gutenberg press of modern times
      • Collaboration with other teachers and students
        • ePALS
      • New instructional strategies
    •  
    • THE FUTURE OF THE INTERNET AND THE WORLD WIDE WEB
      • Will connect 80 percent of the world’s computers in a few years
      • More than a billion wireless communication devices will be in use by the middle of the decade
      • All K-12 teachers will have access to the Internet in their classrooms
      • Wireless technology will become commonplace in K-12 education
    • THE FUTURE OF THE INTERNET AND THE WORLD WIDE WEB
      • Everyday appliances with embedded computers will have Internet access
      • More intelligent and focused Web search capabilities
      • 100 to 1,000 times faster in a few years
      • Business will continue to be the driving force
    • THE FUTURE OF THE INTERNET AND THE WORLD WIDE WEB
      • Increased access speeds and greater availability will allow teachers and students to view thousands of videos
      • The Web will become an integral part of all education and will revolutionize the way students learn core subjects
    • CHAPTER SUMMARY
      • Define communications
      • Identify the basic components of a communications system
      • Describe how and why network computers are used in schools and school districts
      • Explain how the Internet works
    • CHAPTER SUMMARY
      • Describe the World Wide Web portion of the Internet
      • Specify how Web documents are linked to one another
      • Explain the use of browser software
      • Explain how to use a Web search tool to find information
    • CHAPTER SUMMARY
      • Identify several types of multimedia products available on the Web
      • Explain how Internet services, such as e-mail, newsgroups, chat rooms, and instant messaging work
      • Describe the educational implications of the Internet and the World Wide Web
      • Describe how to connect to the Internet and the World Wide Web
    • Chapter 2 Complete
    • GUIDE TO WORLD WIDE WEB SITES AND SEARCHING TECHNIQUES
    • An extensive, current list of Web sites in various categories can be found at: http://www.scsite.com/tdc3 Click the Special Feature, Guide to WWW Sites link on the left sidebar
    • USING A SUBJECT DIRECTORY
      • Provides categorized lists of links
      • Arranged by subjects
      • This example will show you how to find information on Mark Twain’s childhood
    • USING A SUBJECT DIRECTORY Start your browser and enter the URL www.yahoo.com in the Address box. When the Yahoo! home page appears, point to the Literature link below Arts & Humanities. You point to Literature because that is the category in which Mark Twain made his contributions.
    • USING A SUBJECT DIRECTORY Click Literature. When the Literature page appears, point to the Authors link. You point to Authors because Mark Twain was an author. Each time you click a category link, you move closer to the topic.
    • USING A SUBJECT DIRECTORY Click Authors. When the Authors page appears, scroll down and point to the letter T in the alphabetical site listings. (You can also find information about Mark Twain by clicking the Literary Fiction link.)
    • USING A SUBJECT DIRECTORY Click the letter T. The browser window displays an alphabetical listing of authors whose last names begin with T, as well as other author-related organizations that begin with T. Scroll down and then point to the Twain, Mark (1835-1910) link.
    • USING A SUBJECT DIRECTORY Click Twain, Mark (1835-1910). When the page appears, scroll down and then point to the Mark Twain Papers & Project link.
    • USING A SUBJECT DIRECTORY Click the Mark Twain Papers & Projects link. When the page appears, click the links one at a time. Use the browser’s Back button to Return to The Mark Twain Papers & Project page after viewing the page associated with each link.
    • USING A SEARCH ENGINE
      • Search many Web sites for information you are seeking
      • Carefully craft your keywords to limit the search
      • This example uses the Google search engine to search for the phrase, mark twain papers
    • USING A SEARCH ENGINE Start your browser and then enter the URL http://www.google.com in the Address box. When the Google home page appears, type mark twain papers in the Search text box and then point to the Google Search button.
    • USING A SEARCH ENGINE Click the Google Search button. When the results of the search appear, scroll through the links and read the descriptions. Point to the Mark Twain Papers & Project link.
    • USING A SEARCH ENGINE
      • Click the Mark Twain Papers & Project link. A Web page appears that contains extensive information about the collected original documents by and about Mark Twain
    • LIMITING THE SEARCH
    • GUIDELINES TO SUCCESSFUL SEARCHING
      • Use nouns as keywords, and put the most important terms first in your keyword
      • Use the asterisk (*) to find plurals of words
      • Type keywords in lowercase to find both lowercase and uppercase variations
    • GUIDELINES TO SUCCESSFUL SEARCHING
      • Use quotation marks to create phrases so the search engine finds the exact sequence of words
      • Use a hyphen alternative
        • E-mail or email
      • Limit the search by language
      • Use uppercase characters for Boolean operators
    • GUIDELINES TO SUCCESSFUL SEARCHING
      • Before you use a search engine, read its Help
      • The Internet contains many search engines. If your search is unsuccessful with one search engine, try another
    • POPULAR SEARCH SITES
      • Google
        • google.com
      • AllTheWeb
        • alltheweb.com
      • Yahoo!
        • yahoo.com
      • MSN Search
        • search.msn.com
      • AOL Search
        • search.aol.com
    • POPULAR PORTALS
      • Ask Jeeves
        • askjeeves.com
      • HotBot
        • hotbot.com
      • Lycos
        • lycos.com
      • LookSmart
        • looksmart.com
      • AltaVista
        • altavista.com
    • POPULAR PORTALS
      • Netscape Search
        • search.netscape.com
      • Overture
        • overture.com
      • InfoSpace
        • infospace.com
    • POPULAR EDUCATION SEARCH TOOLS
      • Ask Jeeves for Kids
        • ajkids.com
      • Awesome Library
        • awesomelibrary.org
      • Ben’s Guide to U.S. Government for Kids
        • bensguide.gpo.gov
      • Blue Web’N
        • www.kn.pacbell.com/wired/bluewebn
      • Busy Teachers’ Web Site K-12
        • www.ceismc.gatech.edu/busyt
    • POPULAR EDUCATION SEARCH TOOLS
      • Education Index
        • educationindex.com
      • Education World
        • www.education-world.com
      • EduHound
        • www.eduhound.com
      • emTech
        • www.emtech.net
      • FirstGov for Kids
        • kids.gov
    • POPULAR EDUCATION SEARCH TOOLS
      • Great Web Sites for Kids
        • www.ala.org/alsc/children_links.html
      • Kathy Schrock’s Guide for Educators
        • school.discovery.com/schrockguide
      • KidsClick!
        • sunsite.berkeley.edu/KidsClick!
      • Kid’s Search Tools
        • www.rcls.org/ksearch.htm
      • Learning Page
        • learningpage.com
    • POPULAR EDUCATION SEARCH TOOLS
      • Sites for Teachers
        • www.sitesforteachers.com
      • STEM-NET Theme Pages for Elementary Students and Teachers
        • www.stemnet.nf.ca/CUTE/themes.html
      • The Gateway to Educational Materials (GEM)
        • www.thegateway.org
      • TekMom’s Search Tools for Students
        • tekmom.com/search
      • Yahooligans
        • www.yahooligans.com