Lesson Notes By Weeks and Term v3 - Senior Secondary 3
Introduction to World Wide Web (WWW)
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Introduction to World Wide Web (WWW)
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Subject: Computer & IT
Class: Senior Secondary 3
Term: 1st Term
Week: 3
Theme: Information And Communications Technology
This page supports the lesson note with a companion video and a short classroom-ready summary.
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Mini) on a computer or mobile device.
2. Type a URL: In the browser's address bar (the input field at the top of the browser window), type the full URL of the website or web page intended to be visited (e.g., `www.nigerianfinder.com` for Nigerian information, `www.unilag.edu.ng` for the University of Lagos website).
3. Press Enter: Press the `Enter` key (or `Go` on mobile keyboards). The browser will send a request to the web server, which will then send the web page back for display.
4. Use Hyperlinks: Once on a web page, click on any underlined or highlighted text/images (hyperlinks) to jump to another page or resource. 5.
This section provides the core content necessary for the teacher to deliver the lesson comprehensively. 2.
1. Definition of World Wide Web (WWW) The World Wide Web (WWW), often simply called "the Web," is a global system of interconnected hypertext documents and other media accessible via the Internet. It is a system of interlinked public web pages that can be accessed through the Internet. It is not the same as the Internet, but rather a service that runs on the Internet. Think of the Internet as the physical infrastructure (cables, routers, servers) and the Web as a vast collection of documents and services that use that infrastructure. It allows users to view and navigate between documents and other web resources using hyperlinks. These resources are identified by Uniform Resource Locators (URLs).
Full Meaning of WWW: World Wide Web. 2.
2. Brief History of WWW The World Wide Web was invented by Tim Berners-Lee in 1989 while he was working at CERN (European Organization for Nuclear Research) in Switzerland. His original goal was to create a system for scientists to share information more easily across different computer systems. In 1990, Berners-Lee developed the three fundamental technologies that remain the foundation of the Web today: HTML (HyperText Markup Language): The language for creating web pages. URI (Uniform Resource Identifier) / URL (Uniform Resource Locator): A unique address for each resource on the Web.
HTTP (HyperText Transfer Protocol): The set of rules for exchanging data over the Web. He also wrote the first web browser (called "WorldWideWeb") and the first web server software. The Web was made available to the public in
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1. Its growth exploded in the mid-1990s with the release of graphical web browsers like Mosaic, which made it easier for non-technical users to access and interact with web content. Since then, it has evolved into the ubiquitous platform we know today, revolutionising communication, commerce, and information access globally, including in Nigeria. 2.
3. Basic Terminologies of WWW Web Page: A digital document or information resource, typically written in HTML, designed to be viewed in a web browser. It can contain text, images, videos, audio, and hyperlinks.
Example: A single news article displayed on vanguardngr.com.
Website: A collection of related web pages, typically identified by a common domain name and published on at least one web server. All the pages on www.jamb.gov.ng collectively form the JAMB website.
Web Browser: A software application used to access, retrieve, present, and traverse information resources on the World Wide Web. It translates HTML code into a visible web page.
Examples relevant to Nigeria: Google Chrome, Mozilla Firefox, Microsoft Edge, Opera Mini (very popular on mobile devices in Nigeria due to data compression).
Web Server: A computer program or device that stores website content (web pages, images, etc.) and delivers them to client web browsers upon request. When a user types a URL, the browser sends a request to the web server hosting that website, which then sends back the requested web page.
Hyperlink (Link): A reference to data that the user can directly follow either by clicking, tapping, or hovering. Hyperlinks are the foundation of navigation on the Web, connecting one web page to another, or even to different sections within the same page.
Example: Clicking on "Read More" button on a Nigerian news site.
URL (Uniform Resource Locator): The unique address of a given resource on the Web. It specifies the location of a resource on the Internet and the protocol used to retrieve it.
Structure of a typical URL: `protocol://domain-name.top-level-domain/path/filename`
Example: `https://www.waecdirect.org/results/` `https://`: The protocol (secure hypertext transfer protocol). `www.waecdirect.org`: The domain name. `/results/`: The path to a specific page or directory on the server.
Domain Name: A unique, human-readable name that identifies a website or web server on the Internet. It is used in URLs to identify particular web pages.
Examples: `google.com`, `unn.edu.ng`, `konga.com`, `premiumtimesng.com`. * Top-Level Domain (TLD): The last part of a domain name (e.g., `.com`, `.org`, `.net`, `.edu`, `.gov`). Nigeria has its own country-code TLD, `.ng` (e.g., `ng.com`, a typical URL: `protocol://domain-name.top-level-domain/path/filename`
Example: `https://www.waecdirect.org/results/` `https://`: The protocol (secure hypertext transfer protocol). `www.waecdirect.org`: The domain name. `/results/`: The path to a specific page or directory on the server.
Domain Name: A unique, human-readable name that identifies a website or web server on the Internet. It is used in URLs to identify particular web pages.
Examples: `google.com`, `unn.edu.ng`, `konga.com`, `premiumtimesng.com`.
Top-Level Domain (TLD): The last part of a domain name (e.g., `.com`, `.org`, `.net`, `.edu`, `.gov`). Nigeria has its own country-code TLD, `.ng` (e.g., `ng.com`, `edu.ng`, `gov.ng`).
ISP (Internet Service Provider): A company that provides individuals and organizations with access to the Internet.
Examples in Nigeria: MTN, Glo, Airtel, 9mobile, Spectranet, Swift Networks. 2.
4. WWW Protocols Protocols are sets of rules that govern how data is formatted, transmitted, and received across a network.
HTTP (Hypertext Transfer Protocol): The foundational protocol for transferring hypertext documents (web pages) over the Internet. It defines how messages are formatted and transmitted, and what actions web servers and browsers should take in response to various commands. HTTPS (Hypertext Transfer Protocol Secure): An extension of HTTP that adds a layer of security through encryption. It uses SSL/TLS (Secure Sockets Layer/Transport Layer Security) to encrypt communication between the browser and the server, protecting sensitive data like passwords, credit card numbers, and personal information. Indicated by a padlock icon in the browser address bar.
FTP (File Transfer Protocol): A standard network protocol used to transfer computer files from one host to another over a TCP-based network. While not primarily for viewing web pages, it's used by web developers to upload website files to web servers. TCP/IP (Transmission Control Protocol/Internet Protocol): These are the fundamental protocols of the Internet.
TCP: Ensures reliable, ordered, and error-checked delivery of a stream of bytes between applications. It breaks data into packets, numbers them, and reassembles them at the destination. IP: Responsible for addressing and routing packets of data so that they can travel across networks and arrive at the correct destination. The WWW relies heavily on TCP/IP for its underlying data transmission. 2.
5. Benefits of WWW The WWW offers numerous benefits, transforming various aspects of life:
1. Information Access: Provides immediate access to a vast repository of information on virtually any topic (news, research, health, weather, current affairs in Nigeria and globally).
2. Communication: Facilitates global communication through email, social media platforms (Facebook, WhatsApp, Twitter/X), instant messaging, and video conferencing.
3. E-commerce: Enables online buying and selling of goods and services (e.g., Jumia, Konga, local businesses using Instagram/WhatsApp to sell products), online banking, and bill payments.
4. Education: Supports e-learning, online courses (e.g., MOOCs from Nigerian universities or international platforms), academic research, accessing educational resources (JAMB/WAEC results and past questions), and distance learning.
5. Entertainment: Offers a wide range of entertainment options including streaming movies and music (e.g., Netflix, YouTube, local music platforms), online gaming, and digital content.
6. Job Opportunities: Provides platforms for job searching (e.g., Jobberman, LinkedIn), remote work, and freelancing, connecting Nigerian talent with local and international employers.
7. Government Services (E-governance): Enables access to government information and services online, such as NIN registration, BVN checks, voters' registration, and accessing public records.
8. Innovation and Entrepreneurship: Lowers barriers for individuals and small businesses to reach wider markets, create new services, and drive economic growth. 2.
6. Navigating Through Websites Using Web Site Addresses Navigating the web involves using a web browser to locate and view web pages. * Steps for Navigation:
1. Launch a Web Browser: Open a web browser application (e.g., Chrome, Firefox, Opera Mini) on a computer or mobile device.
2. Type a URL: In the browser's address bar (the input field at the top of the browser window), type the full URL of the website or web page intended to be visited (e.g., `www.nigerianfinder.com` for Nigerian information, `www.unilag.edu.ng` for the University of Lagos website).
3. Press Enter: Press the `Enter` key (or `Go` on mobile keyboards). The browser will send a request to the web server, which will then send the web page back for display.
4. Use Hyperlinks: Once on a web page, This section outlines practical activities for both the teacher and students to ensure active learning and understanding. 3.
1. Teacher Activities Introduction (5 minutes): Begin by asking students to briefly share how they or their family members use the Internet (e.g., checking WAEC results, chatting on WhatsApp, buying things on Jumia). Introduce the term "World Wide Web" as the core technology behind most of these activities. State the learning objectives for the lesson clearly.
Concept Explanation (20 minutes): Define WWW: Clearly explain what the World Wide Web is and its relationship with the Internet. Write "World Wide Web" and its acronym "WWW" on the board.
Brief History: Narrate the story of Tim Berners-Lee and CERN, highlighting the key inventions (HTML, HTTP, URL) and the purpose of the WW
W. Basic Terminologies: Introduce and explain each term (Web Page, Website, Web Browser, Web Server, Hyperlink, URL, Domain Name, ISP). Use diagrams on the board to illustrate connections (e.g., browser requesting from server, website made of pages). Provide specific Nigerian examples for each (e.g., jamb.gov.ng as a website, MTN as an ISP, Chrome as a browser). Break down a URL into its components.
WWW Protocols: List and briefly explain HTTP, HTTPS, FTP, and TCP/IP, emphasizing their roles in secure and efficient web communication. Demonstration (15 minutes – requires projector/computer or detailed simulation): Website Navigation: If a projector and internet-enabled computer are available: Project a web browser. Demonstrate opening the browser, typing a URL (e.g., `www.nigerianfinder.com` or `www.premiumtimesng.com`), navigating by clicking hyperlinks, using back/forward buttons. Show how to search using a search engine (Google).
If no projector: Draw a browser interface on the board. Simulate the steps, verbally describing each action. Ask students to imagine the process. Use printouts of webpages if available. Website Design Software (Visualisation/Description): If a projector is available: Briefly show screenshots or interfaces of a text editor (like VS Code with some HTML code) and a WYSIWYG editor (like a Wix editor or Google Sites). Point out the differences.
If no projector: Describe the functionality of each software type, focusing on their use cases and how they differ in approach (coding vs. drag-and-drop).
Benefits of WWW (10 minutes): Lead a brainstorming session asking students to state how the WWW helps people in Nigeria. List their points on the board. Supplement their points with other benefits as listed in the "Key Concepts" section (e.g., e-governance, job opportunities).
Question and Answer Session (5 minutes): Allow students to ask questions for clarification on any concept. 3.
2. Student Activities Participation: Actively participate in the initial discussion about Internet usage.
Note-taking: Copy definitions and key points from the board and explanations.
Discussion: Engage in the brainstorming session about the benefits of the WW
W. Identification: Identify different parts of a URL when broken down by the teacher.
Simulated Navigation: Verbally describe the steps to navigate to a specific Nigerian website (e.g., a university portal, a news site) when prompted during the demonstration.
Observation: Pay close attention during the demonstration of website navigation and website design software.
Asking Questions: Ask clarifying questions about concepts or demonstrations. This section provides scaffolded practice questions to reinforce learning, with detailed solutions for the teacher.
Question 1: You want to access the official website for checking your WAEC results. a) State the full meaning of WWW. b) What is the most likely protocol you will observe in the website's address bar to ensure your result access is secure? c) Provide an example of a full URL you might use for this purpose, breaking it down into its protocol, domain name, and path.
Solution 1: a) The full meaning of WWW is World Wide Web. b) The most likely protocol for secure access to sensitive information like WAEC results is HTTPS (Hypertext Transfer Protocol Secure). The "S" signifies secure communication. c) An example URL could be `https://www.waecdirect.org/results/` Protocol: `https://` Domain Name: `www.waecdirect.org` Path: `/results/`
Commentary:* This question tests understanding of WWW definition, secure protocols, and URL structure, using a highly relevant Nigerian example.
Question 2: Imagine your friend is struggling to understand the difference between a "web page" and a "website." Explain this difference to them using an analogy relevant to a Nigerian context.
Solution 2: A website is like an entire school compound (e.g., Government Secondary School, Abuja) which has many different buildings and facilities. Each individual building or facility within that compound (like the Computer Lab, the Library, the Principal's Office, a specific classroom) is analogous to a web page. So, a website is a collection of related web pages, just as a school compound is a collection of related buildings. You can visit different "pages" (buildings) within the same "website" (school compound).
Commentary:* This uses a common analogy (school) and directly addresses the definitions of two core terminologies, reinforcing comprehension through relatable context.
Question 3: You are a small business owner in Kano State, selling handmade leather products. You want to create an online presence to reach more customers across Nigeria and beyond. a) List two common types of software you could use for designing your website, and briefly explain which type might be more suitable if you have little to no coding experience. b) Name two benefits of using the WWW for your business.
Solution 3: a) Two common types of software for designing a website are: Text Editors (e.g., Visual Studio Code, Notepad++): These are used for writing HTML, CSS, and JavaScript code manually. WYSIWYG Editors / Content Management Systems (CMS) (e.g., Wix, Google Sites, WordPress): These allow visual design using drag-and-drop interfaces or pre-built templates without writing code. If you have little to no coding experience, WYSIWYG Editors or CMS platforms would be more suitable. They provide user-friendly interfaces where you can design your website visually and easily manage content without needing to understand the underlying code. b) Two benefits of using the WWW for your business: Expanded Market Reach: You can reach customers beyond Kano, across Nigeria (e.g., Lagos, Port Harcourt) and even internationally, significantly increasing potential sales. 24/7 Availability: Your online store is accessible to customers at any time, day or night, allowing them to browse and purchase products outside traditional business hours.
Commentary:* This question combines knowledge of website design software and the benefits of the WWW, grounding it in a practical entrepreneurial scenario common in Nigeria.
The WWW is deeply integrated into daily life and various sectors in Nigeria.
E-governance and Public Services: Application: Nigerian citizens use the WWW to access government services and information. Examples include checking JAMB/WAEC results and admission statuses (using `www.jamb.gov.ng`, `www.waecdirect.org`), registering for National Identification Number (NIN) or voters' cards, verifying Bank Verification Number (BVN) records, and accessing portals for ministries, departments, and agencies.
Integration: Students understand that the knowledge of navigating the web is essential for interacting with crucial national services, making them more informed and capable citizens.
E-commerce and Entrepreneurship: Application: The WWW facilitates a booming e-commerce sector in Nigeria. Platforms like Jumia (`www.jumia.com.ng`) and Konga (`www.konga.com`) allow Nigerians to buy and sell products ranging from electronics to fashion. Small businesses and individual entrepreneurs also use social media platforms (Instagram, Facebook) or simple websites built with tools like Wix or WordPress to showcase and sell their goods (e.g., local artisans selling crafts, farmers selling produce).
Integration: This connects the topic to economic opportunities, showing students how they can leverage the web for entrepreneurship, job creation, and contributing to the local economy.
Education and Information Access: Application: Beyond checking exam results, the WWW serves as a vast educational resource. Students can access online learning platforms (e.g., Open Educational Resources, MOOCs from Nigerian universities), conduct research for school projects, download past questions, read Nigerian news from reputable sources like Premium Times (`www.premiumtimesng.com`) or The Guardian (`www.guardian.ng`), and learn new skills through tutorials.
Integration: This highlights the WWW as a powerful tool for self-improvement and academic success, directly relevant to students' educational journey and lifelong learning.