Introduction IT in Education: Foundation Lee Fong-Lok, [email protected]

Introduction

IT in Education: FoundationLee Fong-Lok, [email protected]

IT Education in Hong Kong

http://www.info.gov.hk/emb/public/it_table.html

2000-01 2002-03

100%

75%

25%

1至

2人

100%

: 在職教師: 職前培訓

中級程度 Intermediate Level

•在授課和備課時，懂得運用一些資訊科技工具，

•應用互聯網及內聯網上的教學資源。 •須接受約 30 小時訓練；

中等程度課程30 小時

• Word Processing II

• Presentation Software II

• Multimedia Production I

• Web Page Design I

• Internet/Intranet Applications

• Courseware Evaluation

• Chinese Character Input (Optional)

• Database I (Optional)

• Spreadsheet Operation I (Optional) 三選二

More Information on IT Competency

• CUHK http://www.sitc.cuhk.edu.hk/

• Hong Kong http://www.hkedcity.net/resources/

What you are expected

• Achieved CU IT Competency (~ Basic)

• Study Level 2 (~ Intermediate)

• Study Level 3 (~ Upper Intermediate) before graduation

Internet/Intranet Applications

• Internet, Extranet, Intranet and WWW

• Discussion Group, Newsgroup and ICQ

• Educational Values of WWW

• File Transfer Protocol (FTP)

WWW and Internet Technology

Basic Concepts in Computer Networks

Personal Computer (PC)



Computer NetworkA group of two or more computers linked together.



Local Area Network (LAN)A computer network where the computers are geographically close together (that is, in the same building).

Sharing Files in the LAN

• Share folders with others

• Upload to or download from a computer in the same LAN.

• Shared Drive



Sino Building 614 M1, Ho Tim Building

Wide Area Network (WAN)A computer network that spans a relatively large geographical area. Typically, a WAN consists of two or

more LAN.

Web Server

mailservftp server



Internet•A global network connecting millions of computers.•INTERnational NETwork

CUHK Internet

World Wide Web• WWW or the Web. • It consists of a network of computers which

provide Web pages to Internet users. • Web pages consist of hypertext which

includes text (and pictures) to provide information along with links to other Web pages.

• Users access these pages using a browser which uses the addresses of the links to connect to and download the pages.

Examples of Browsers

• Internet Explorer http://support.microsoft.com/ph/2073

• Netscape http://home.netscape.com/

• Avant Brower http://www.avantbrowser.com/

• Opera http://www.opera.com/

• Firefox http://moztw.org/firefox/


Internet Access

Access from a LANYou can access the Internet if you are connected to a LAN,which is connected to the Internet.

Internet

Youwww.yahoo.com


Internet Services - Web

A Web page may contain text, images (.gif, .jpg format), audio, video objects as well as hyperlinksA hyperlink links to another Internet object, which is specified by a URL (Unique Resource Locator)There are two types of hyperlink:

Text based hyperlinkImage based hyperlink

A URL is the address of a particular Internet objecthttp://www.cuhk.edu.hk/fed/tutorial.html

Protocol Server nameDirectoryname

File name

The HTTP Protocols

• The Hypertext Transfer Protocol (HTTP) is the set of rules for exchanging files (text, graphic images, sound, video, and other multimedia files) on the World Wide Web

• It is the default protocol used in the web browsers


Internet Services – Web publishing

Use HTTP (HyperText Transfer Protocol)Supported by the Web ServerClient needs a Web-browser to access the web pages

Web ServerWeb Client (via browser)

Webpage


FTP (File Transfer Protocol)• FTP (File Transfer Protocol) – an Internet Protocol used to

exchange files between computers in the Internet• You can use FTP with a simple command line interface, a

browser or FTP tools such as WS_FTP E.g. try accessing ftp://ftp.cuhk.edu.hk using a browser

• Using FTP, you can update (delete, rename, move and copy) files which are at the server side

• Nowadays, the word FTP is often abused. Many of the so-called “FTP sites” uses HTTP to transfer files– HTTP – mainly for displaying web pages– FTP – for file transfer and file operations

Using FTP to upload

Web Server

Your PC

Other users

To publish a webpage, you need to uploadthe corresponding files to the web server.

Webpage

uploaddownload

Upload the web pages usingWS_FTP (an FTP software)

Start WS_FTP Click on the WSFTP logo Or 開始 -> 程式集 -> Internet Tools -> WS_FTP

Create a new FTP profile:

Click to create a new profile

The name of the server

Your account ID

Your password

Using FTP

iHome:

ftp://iHome.cuhk.edu.hk

Login: sxxxxxx

Password: xxxxxx

Learning Community:

ftp:/course.fed.cuhk.edu.hk

Login and Password: to be assigned by the system.

Upload the web pages usingWS_FTP (an FTP software)

Transfer your local files to the server:

The files are uploaded to the server using the File Transfer Protocol (FTP)

Files in your local hard disk

Click on the arrow toupload the files

Files on the server under yourown directory


Intranet• An internal parts of a company’s

web pages• Private, can only access within

the organization• Contains information and

services which can only access by the staff and employees/students within an organization

• Security is important– Use firewalls to restrict access

from outside network– Sometimes need login


Intranet• Example:

– http://www.lib.cuhk.edu.hk/electronic/jol.htm– Only students/staffs from CUHK can access to the abov

e link (CU intranet)– Only computers that are directly connected to the CU n

etwork can access to the server hosting these information information

• Example:– https://extranet.hku.hk/apptunit/– You cannot access the “For HKU Staff Only” session


Intranet

Internet

Intranet Web

Server

Internet Web

Server

Firewall(block external traffic)

• Only computers which are “behind” the firewall can access to the Intranet Web Server

Organization LAN/WAN

Extranet

• An extension of a company's Intranet out onto the Internet.

• Allows the sharing of a company's data and/or operations with partners, customers, suppliers, and vendors.


Newsgroups and Discussion Forums

• Purpose: a place for exchanging information within a group of people

• Web based vs. non-web based– Discussion groups: Web based

http://www2.fed.cuhk.edu.hk/ited/AppOfComp/Forum.htm

– Newsgroups: Non-web based news://news.cuhk.edu.hk/cuhk.forum

– For newsgroups (non-web based), newsgroup client software is needed. You also need to subscribe to the newsgroup first

• (compare with hotmail and mailserv)

ICQ (I seek you)– ICQ ("I seek you"),

– the popular instant-messaging program that lets you communicate with friends and colleagues in real time.

– To seek out a friend on the ICQ network, simply enter his or her ICQ number, name, nickname, or email address.

– Once your contact list is set up, you'll be notified when your friends are online so that you can chat; send instant messages, files, and URLs; play games; or just hang out.

• Download the system at http://www.icq.com/download/ and follow the instructions to install and register.

• See if you can find my ICQ number and ICQ me.

MSN Messenger

• http://messenger.msn.com/xp/downloadDefault.aspx

Education Values of WWW

Teaching and Learning Resources in WWW

• Useful Links– http://

www.fed.cuhk.edu.hk/fllee/CommonUse/Links.htm

• 香港資訊校園 – http://www.hkcampus.net/main.phtml

• 香港資訊教育城– http://www.hkedcity.net

Internet Filtering• There are very little control (or no control at all) over

the contents that post in the Internet• Not all are suitable for students/children• Requires Internet filtering software to block unwanted

sites

http://www.we-blocker.com/

http://www.surfcontrol.com

Education Values of WWW

Web-based Learning & Virtual Classrooms

• Some examples:– https://www.sitc.cuhk.edu.hk/itcourseware2/index.jsp (need

login)– WebCT

• A complete Web-based learning environment shall include the following elements / functionalities:– Course materials– Assignment submission – Evaluation and assessment– Teacher-student communication– Etc etc…

Not only course materials!!

References• http://www.edrenplanners.com/present/intranet/intra_def.shtml

• http://www2.vip.net/~seniors/definit.htm• http://www.info.gov.hk/emb/public/it_table.html• CUHK http://www.sitc.cuhk.edu.hk/ • http://courseweb.bus.lsu.edu/summer98/marketing/4

414-1/group4/project1/def.htm• http://www.arsh.com/art-glass/discuss.htm• http://coverage.cnet.com/Content/Features/Howto/Be

yond/ss02.html • http://www.icq.com/

Documents

Introduction IT in Education: Foundation Lee Fong-Lok, [email protected]