Transcript The Internet and Education

Internet and Education
James D. Lehman
Educational Technology
Purdue University
James D. Lehman, Purdue University
Integration and Issues
The Internet and Education:
Integration and Issues
Internet and Education
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What is the Internet?
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What can we do with it?
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How can the Internet be integrated in
education?
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What are key issues that schools face?
James D. Lehman, Purdue University
Integration and Issues
Internet and Education: Overview
Internet and Education
James D. Lehman, Purdue University
Integration and Issues
What is the Internet?
Internet and Education
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The Internet is a massive network of
computer networks that links millions of
computers world-wide.
James D. Lehman, Purdue University
Integration and Issues
What is it?
The Internet, or just the Net, is
composed of many separately
administered computer networks with
many different kinds of computers.
 Computers on the Internet are linked by
means of a common communications
protocol known as TCP/IP.
Internet and Education
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James D. Lehman, Purdue University
Integration and Issues
What is it?
Internet and Education
James D. Lehman, Purdue University
Integration and Issues
How did it come to be?
In 1969, the Department of Defense
commissioned ARPANET, the Advanced
Research Projects Agency network.
 ARPANET, which originally connected
four universities, was intended to
research networking.
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James D. Lehman, Purdue University
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Internet History
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A key issue was the potential for
disruption of communication in the
event of a military strike.
James D. Lehman, Purdue University
Integration and Issues
Internet History
The system that was developed takes
information and breaks it into a series of
packets.
 These packets are routed along any
available pathway to their destination,
where they are reconstructed.
 With this system, information cannot be
blocked at one point.
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James D. Lehman, Purdue University
Integration and Issues
Internet History
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1972 - Telnet and FTP developed
1981 - Bitnet and CSNET created
1982 - TCP/IP developed
1984 - Domain name server introduced
# hosts passed 1,000
1986 - NSFNET created
1987 - # hosts passed 10,000
1989 - # hosts passed 100,000
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Milestones
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1990 - ARPANET ceased to exist
1991 - Gopher created at Minnesota
World Wide Web created at CERN
1992 - # hosts passed 1,000,000
1993 - Mosaic propelled Web growth
1996 - # hosts passed 10,000,000
2001 – # hosts passed 100,000,000 and
Web estimated to have 1 billion+ pages
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Milestones, cont’d.
Today, the Internet encompasses
hundreds of millions of users worldwide. The popularity of the World Wide
Web and easy-to-use browsers have
fueled its explosive growth.
 The Web is now the heart of the
Internet, and the Internet is evolving into
the information superhighway.
Internet and Education
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James D. Lehman, Purdue University
Integration and Issues
The Internet Today
Internet and Education
James D. Lehman, Purdue University
Today’s lesson:
The Web
Integration and Issues
Using the Internet
to Enhance Education
Once the Internet was reserved for only
research and education, but with the
rapid evolution of the technology the
Internet now supports entertainment
and commerce among other things.
 Let’s focus on those functions most
relevant to education.
Internet and Education
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James D. Lehman, Purdue University
Integration and Issues
What can we do?
Internet and Education
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For education, there are three basic
functions that are particularly important:
• Communication
• Information retrieval
• Information publishing
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What can we do?
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Take a few minutes to use one of these
functions (information retrieval) to try to
find the meaning of common Internet
terms.
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Understanding Terminology
Internet and Education
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James D. Lehman, Purdue University
Communication
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List Servers
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News Groups
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Instant Messaging and Chat
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Internet Telephony
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Video Conferencing
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Synchronous
Electronic Mail (e-mail)
Asynchronous
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Communication
E-mail is the most fundamental and
widely used form of Internet
communication.
 It supports one-to-one and one-to-many
communication.
 It is simple, easy-to-use, very fast, and
not subject to problems such as
“telephone tag.”
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James D. Lehman, Purdue University
Integration and Issues
E-Mail
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Teachers can use e-mail to:
• stay in touch with administrators and
teachers within the district
• confer with colleagues in other schools
about content and pedagogy problems
• reach outside content experts
• communicate with parents and students
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E-Mail for Teachers
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Writing exchanges via e-mail with
students at a remote site
• Research has shown that students tend to
write better when they write for a real
audience through e-mail.
• E-mail exchanges can also expand
students’ awareness of other cultures.
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How Can E-Mail Help Students?
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Seeking answers to questions by
e-mailing knowledgeable others. Many
Internet-based education programs now invite
questions from students, e.g.,
• Ask an Expert
http://www.askanexpert.com/
• Scientific American’s Ask the Experts
http://www.sciam.com/askexpert_directory.cfm
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How Can E-Mail Help Students?
Internet and Education
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Students can also contact members of
the community, elected officials, etc.
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Some special Internet project allow
students to follow and communicate
with explorers, e.g.,
• http://www.adventureonline.com/
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How Can E-Mail Help Students?
Internet and Education
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List Servers (listservs)
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News Groups
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Instant Messaging and Chat
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Internet Telephony
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Video Conferencing (CUSeeMe)
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Other Forms of Internet
Communication
Internet and Education
James D. Lehman, Purdue University
Integration and Issues
Information Retrieval
The World Wide Web (aka the Web,
WWW, or W3) is the standard for
information retrieval in the Internet
world.
 Developed at CERN, the European
physics research center, the Web
quickly came to dominate the Internet.
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Integration and Issues
World Wide Web
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The Web is based on a set of protocols:
• HTTP - hypertext transfer protocol, the way
Web pages get sent over the Internet
• HTML - hypertext markup language, the
coding used to define Web pages
• URL - uniform resource locator, the
standard way of defining where information
can be found on the Web
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Integration and Issues
World Wide Web
The Web is accessed through the use
of browser software.
 The first popular browser was called
Mosaic.
 Today, popular browsers include
Microsoft’s Internet Explorer, Apple’s
Safari, Mozilla’s Firefox, Netscape’s
Navigator, and Opera.
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James D. Lehman, Purdue University
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World Wide Web
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Search engines
• Internet sites that maintain databases of
many Web sites that can be searched for
relevant information.
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Examples
• Altavista, AskJeeves, Dogpile, Google,
Infoseek, Lycos, Metacrawler, Teoma,
Vivisimo, Webcrawler, Yahoo
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Finding Information
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Most search engines have advanced
search capabilities. Here are some of
the ones for Google:
•
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use quotes around exact phrases
use OR to find either of two terms
use +term to include a specific term
use * as a wild card term
use ~term to look for synonyms
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Using Search Engines
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Up-to-date information can be accessed
immediately (e.g., weather, news, breaking
scientific information such as NASA’s Mars
explorer).
Resources hitherto available to only a few
(e.g., drafts of the Declaration of
Independence, Dead Sea Scrolls) are freely
available to people everywhere.
• http://www.loc.gov/exhibits/
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Advantages of Web Resources
The Web offers wonderful resources for
the classroom that have never before
been available.
 Just keep in mind that the Web is like a
library without the librarian; no one
checks what gets put on the shelves,
and finding what you need can
sometimes be a challenge.
Internet and Education
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James D. Lehman, Purdue University
Integration and Issues
Web Resources
Because the Web may contain
unsuitable materials, students need to
learn how to judge Internet resources.
 Review criteria for assessing web
pages, and check the examples
provided to determine which sites are
and are not valid sources of information.
Internet and Education
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James D. Lehman, Purdue University
Integration and Issues
Assessing Web Resources
A structured form of Web use for
information retrieval purposes in
education is the WebQuest, developed
by Bernie Dodge at San Diego State.
 Learn more at:
Internet and Education
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• http://webquest.sdsu.edu/
• http://www.webquest.org/
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WebQuests
Internet and Education
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Class Project
The Solar System
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Information Publication
Internet and Education
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The Web allows everyone to be their
own publisher.
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Schools are beginning to take
advantage of this capability by posting
teachers’ materials and/or students’
work to the school website.
James D. Lehman, Purdue University
Integration and Issues
Information Publication
Internet and Education
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The rationale for posting students’ work
comes from:
• research which indicates students write
better when they have a real audience.
• research into the use of stand-alone
hypermedia programs (e.g., HyperStudio)
which suggests that student development
of such projects improves learning.
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Information Publication
Internet and Education
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Publication of student projects on the
Web also facilitates:
• cooperative projects with other schools
• alternative assessment
• communication with parents and the
community (it provides visible evidence of
what is going on in school)
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Information Publication
Blogs – allow users to create personal
websites with little development work
 Wikis – support group development of a
website
 Web page editors for development of
websites:
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• Macromedia Dreamweaver
• Microsoft FrontPage
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Publishing Tools
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Remember, copyright and right-toprivacy laws protect students’ work.
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Before putting any student work on the
Internet, be sure to get the permission
of parents/guardians and the students
themselves.
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Integration and Issues
Caution
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Issues for Schools
Internet and Education
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Schools face a
variety of new or
exacerbated issues
when dealing with
the Internet.
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Integration and Issues
School Issues
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Pornography or
other undesirable
content
Inaccurate or biased
content
Harmful or malicious
behavior (e.g.,
flaming, viruses)
James D. Lehman, Purdue University
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Proper netiquette
and responsible
behavior
Individuals’ privacy
Copyright,
plagiarism, and
intellectual property
Integration and
assessment
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School Issues
One approach to inappropriate content
is to block it.
 Programs like Cyber Patrol and Surf
Watch can do this.
 Keep in mind, however, that the Internet
was built to defeat blocks. Enterprising
students can often found ways around
them.
Internet and Education
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James D. Lehman, Purdue University
Integration and Issues
Blocking Inappropriate Content
All schools should have an Internet
Acceptable Use Policy. In most cases,
both students and parents should sign
this policy.
 This approach relies on education,
along with appropriate management, to
minimize problems.
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James D. Lehman, Purdue University
Integration and Issues
Setting Usage Guidelines
In addition to these measures,
consideration of issues should be a part
of Internet lessons in the classroom.
 For example, students need to learn
how to distinguish good information
from bad in the on-line world. This
should be something they take away
from their classroom lessons.
Internet and Education
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James D. Lehman, Purdue University
Integration and Issues
Education in the Classroom
Internet and Education
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In the end, it is you,
the individual
teacher, who can
best determine how
to use the Internet for
improving teaching
and learning.
James D. Lehman, Purdue University
Integration and Issues
The Teacher is Key
Internet and Education
James D. Lehman, Purdue University
Integration and Issues
The End