Upload
imogen-day
View
216
Download
1
Tags:
Embed Size (px)
Citation preview
Think again Search engines access a relatively
small part of the web, known as the “free web”
A large portion of the web, inaccessible to the search engine, is known as the “invisible web”
So, what’s not on the free web? Around 90% of the books on our
shelves The full text on many magazine &
newspaper articles Expansive reference books, like
literary criticism, in-depth biographies, & historical works
Why can’t it all be free? (some things you need to know about the publishing biz)
Serious authors are in the business of making money for their hard work
Publishers expect a return on their work
Copyright laws protect “intellectual property”
And remember, your teachers expect quality Material from subscription services
is likely to be viewed by your teachers as more authoritative
You may have to defend some of the sources your find on the “free web”
You may want to dig deeper.
There are some “free web” databases!!!
For example: you want to find some pictures of the Battle of Gettysburg
You may find some good ones through an image search on your favorite search engine
But did you know there is a database devoted to civil war photographs
Search engines cannot pick up those photos of Gettysburg in that rich database because the database content is not searchable until you are actually in the database.
But how do you find a database like that? Use the word database with your
search terms Use a tool like Librarians index
(lii.org) to identify specialized databases
But there is more to the web than free databases!!! LAUSD’s Digital Library with over 30
subscription databases. http://notebook.lausd.net/portal/page?_pageid=33,245998&_dad=ptl&_schema=PTL_EP
Gale e-books, which is a collection of all Gale reference books you can access from home. http://infotrac.galegroup.com/itweb/maywoodhs
This is the good stuff Ignoring these databases is like
asking your parents to get premium cable and watching basic cable stations all the time.
The “free web” vs. Databases Use the “free web”
or internet when you: Are willing to evaluate
the web site’s content Want other world-wide
sites Want government
information Want to go to a specific
web site Want information on a
unique topic
Use databases when you want: Newspaper articles Magazine articles Encyclopedia articles Biographical
information Statistical information Authentic information