The Internet is a network of networks connecting computers around the world. It began in 1969 as a result of the Cold War to guarantee that communications would remain intact in case of a national disaster such as a nuclear war. This was the ARPAnet (Advanced Research Projects Agency Network ) first created for military and scientific personnel and consisted of 4 computers. It is hard to establish exactly how many millions of computers are connected now.
Data is transmitted between computers using a standard called TCP/IP (Transmission Protocol/Internet Protocol)
Originally we had only UNIX based programs such as Telnet, FTP, Archie, and Gopher to locate and download sites and files. Each had its own rules or syntax , and allowed only plain text to be transmitted.
In 1991, the WWW (World Wide Web)(The Web) was introduced. This
could deliver pictures, sound, and video to a computer (client) requesting
it from a server ( computer making the hypermedia documents available).
In order for all clients to be able to receive hypermedia, a standard protocol
called http (HyperText Transfer Protocol) must be adhered to. That is why
most addresses or WWW sites begin with http://www
Connecting to the Internet requires software to connect your local
computer to a host computer, and if you are remote from the host, you will
also require a modem and an internet provider. The internet service provider
(ISP) supplies you with the software and connections for a specified number
of connect hours per month.
Once you are connected to a host computer, in order to access sites, you also need a program called a browser such as Netscape Communicator or Microsoft Internet Explorer.
Netscape Communicator - is the browser we are using . It has a component bar docked on lower right hand of window
To switch between components or applications, just click on icons for Mailbox, Composer, etc. These main components are also found under Communicator in Menu. Most commonly used components are:
Buttons:
Any Web address or URL(Uniform Resource Locator) that begins with http is a WWW site.
A Home Page is the first document located at a Web site. Ex: The ST.F.X.U.
Home Page. http://www.stfx.ca/ From there
we can go to sub pages. My Home Page is at http://juliet.stfx.ca/~rjmackin/welcome.html
. It is customary to name all home pages welcome.html.
My Ed467 course Page is at http://www.stfx.ca/people/rjmackin/ed467/ed467.htm
All Web pages have the file extension name of either .html or
.htm
Moving around page: scrolling, CTRL + HOME & END, and arrows
Finding text in long document :- CTRL + F --> fill in text you are looking for (use key words or partial words )
History - lists all URLs previously visited CTRL + H can
be edited and viewed sorted in various ways. You can connect directly
to previously visited sites by clicking on them here.
Status bar shows how accessing and loading the site is progressing
Going to Web Sites or Entering URLS can be done in several ways:
Bookmarks -
can be added simply by:
Clicking on Bookmarks next to Location --> Add --> this will
add the URL to the end of your bookmark collection
Nova Scotia Department of Education Learning Resources and Technology http://www.EDnet.ns.ca/educ/program/lrt/ - mainly for LRT Updates and recommended softwareReasons for not finding the site Error Messages : Unable to locate server may be due to:Canada's Schoolnet - http://www.schoolnet.ca/ - a must resource for Canadian teachers
Bluewebn - http://www.kn.pacbell.com/wired/bluewebn/ - star rated award winning Online Lessons and Projects created by teachers
Web66: K12 Schools- http://web66.umn.edu/ Web66 - school web pages from all over the world and web page construction tutorials
B.J. Pinchbeck's Homework Helper http://www.bjpinchbeck.com/ - The WWW from a student's point of view
Copying text from WWW - Highlight text you wish to copy --> Ctrl + C ---> Turn to your word processor and paste it with CTRL + V
Copying images from web Pages - Right click mouse on the image --> Save image as --> select name and folder on the computer's hard drive --> Save
How to Find Good Stuff on your Own
Search Engines- help you find sites related to a specific topic. You enter a query or keyword search onto a search form --> submit -->search engine will return many links containing those words. Some will rank the relevancy of the links depending on how many times the words appeared in the pages.
What Search Engine you use depends on the complexity of your topic and
also is a matter of personal choice. Trying various search engines using
the same search terms is a good idea to see which one gives you the best
results.
For example Altavista
is a type of engine that often brings back too many irrelevant hits
and it is best used for very specific information that other search engines
miss.. Other search engines categorize data and then let you search when
the topic has been narrowed down somewhat producing more relevant results-
Yahoo is such an engine. Others incorporate
several search engines and are called meta search engines such as MetaCrawler.
Among the best search engines are: Excite,
HotBot, Altavista,
and Infoseek. PC Magazine rates Excite
as #1.
An excellent place to find search engine addresses and guides is on the University of Toronto Search Page http://www.fis.utoronto.ca/internet/search.htm
See ratings of search engines at: http://searchenginewatch.com/reviewchart.htm
Searching techniques - Each search engine has its own searching rules. Be sure to follow the help guidelines given.
Common rules for entering most search strings involve:
Using quotes around a string of words which helps in many instances,
such as "Mona Lisa". Otherwise you will get all Monas and all Lisas
on the net
Use AND , OR, and NOT to narrow down the topic, such as in "Prime Minister"
AND Cretien. - makes sure that we only get Cretien who is also Prime Minister.
Using + in front of words makes sure the
word is included. Using - in front of a word
excludes it. Ex. NATO +Kosovo - is same as using AND
, NATO -Kosovo will get all information about NATO except for Kosovo
Practice using Search Engines: 15 minutes - we will discuss which search engine did the best job
Working in groups of two with your neighbor - divide up the search engines above ( three each) and do one of the following searches - use the same search string in all 6 and write down your results: How many hits you get and whether you think the hits are relevant or not.
Newsgroups - are discussion groups where messages are posted to web bulletin boards. For a Yahoo listing of Educational Newsgroups go to http://dir.yahoo.com/Education/K_12/Usenet/
To read messages left by teachers on thousands of different topics
go to Dejanews PowerSearch at http://www.dejanews.com/home_ps.shtml
Enter the search string in the same manner as in search engines and
for results format use threaded. (by topic)
Try this Ex. Ask for Hamlet Lesson Plans by using Hamlet + lesson
plans. Then follow the threaded messages that interest you. If you like
you can post a reply to a message or create a new thread.
Listservs - are discussion groups or mailing
lists you subscribe to and depending on how much talking the group does,
you will get few or many messages sent to you via your email account. There
are hundreds of educational discussion groups. For a listing and directions
on how to subscribe, see: Mailing Lists for Teachers at http://www.sfusd.k12.ca.us/resources/listserv.html
Also see Edweb's http://metalab.unc.edu/edweb/lists.html
If you can't keep up with a lot of mail, see if the list has an archive
you can check instead. For example Edtech
is a great list but you can get up to 10 letters a day from this list.
They have archived
messages where you can read the messages you want.
To subscribe to one of the mailing lists above