Lesson Note on File Sharing: Definition of Network for JSS 2

Class: Junior Secondary School 2 (JSS 2 / JS2)
Term: Third Term
Week: 6
Age: 13 years
Duration: 45 minutes
Subject: Basic Science and Technology
Curriculum Theme: Computer Studies / Information Technology
Previous Lesson: Network Groups: Search Engines.
Topic: FILE SHARING
Subject Matter: Definition of network, Types of network: Local Area Network (LAN), Metropolitan Area Network (MAN), Wide Area Network (WAN), Description of the types of Network

Specific Objectives

By the end of the lesson, pupils should be able to:

Cognitive Domain:

Instructional Materials

The teacher will teach this lesson with the aid of:

• Charts showing diagrams of LAN, MAN, and WAN.
• Pictures of various networking devices such as routers and switches.
• A computer with internet access (if available) to demonstrate network connections.

Rationale for the Lesson

Understanding computer networks is important because they enable communication and resource sharing among devices. This lesson helps pupils grasp how information travels and how different types of networks connect people and systems globally and locally.

Prerequisite/Previous Knowledge

Pupils should have a basic understanding of what a computer is and how computers can be used for basic tasks.

Lesson Content/Board Summary

FILE SHARING AND NETWORKS

Definition of Network

A network is a collection of interconnected computers and devices that can communicate with each other and share resources like files, printers, and internet access. These connections can be made using cables or wireless technology.

Types of Network

Computer networks are generally categorized based on their geographical coverage. The three main types are:

• Local Area Network (LAN)
• Metropolitan Area Network (MAN)
• Wide Area Network (WAN)

Local Area Network (LAN)

A Local Area Network (LAN) connects computers and devices within a limited geographical area, such as a home, school, office building, or a small group of buildings. LANs are typically managed by a single organization.

Characteristics of LAN:

• Covers a small geographical area.
• High data transfer rates (fast).
• Owned and managed by a private organization or individual.
• Less expensive to set up.

Examples of LAN:

• Computers connected in a school computer lab.
• Devices connected in a home network.
• Computers in a small office.

Metropolitan Area Network (MAN)

A Metropolitan Area Network (MAN) connects computers and devices across a city or a large campus. It is larger than a LAN but smaller than a WAN, often connecting multiple LANs together within a specific metropolitan region.

Characteristics of MAN:

• Covers a city or a large geographical area (e.g., a university campus or multiple offices in a city).
• Data transfer rates are moderate to high.
• Often owned by a consortium or a single large organization.
• More complex and expensive than LANs.

Examples of MAN:

• A network connecting different branches of a bank within a city.
• Cable TV networks across a city.
• A university network connecting various departments across campus.

Wide Area Network (WAN)

A Wide Area Network (WAN) connects computers and devices over a large geographical area, spanning across cities, countries, or even continents. The internet is the largest example of a WAN.

Characteristics of WAN:

• Covers a very large geographical area.
• Data transfer rates are generally lower than LANs.
• Often uses public telecommunication networks.
• Expensive and complex to set up and maintain.

Examples of WAN:

• The Internet.
• A company’s network connecting its offices in different countries.
• Airline reservation systems.

Teaching Methods/Instructional Techniques

Discussion, Lecture, Demonstration, Question and Answer, Visual Aids

Instructional Procedures

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction
Teacher’s Activity: The teacher greets the pupils, reviews the previous lesson, and then introduces the topic “File Sharing and Networks” by asking pupils how they share files or information with friends.
Pupils’ Activity: Pupils respond to greetings, recall the previous lesson, and share their experiences of sharing files or information.
Learning Point: Pupils connect new learning to their prior knowledge and daily experiences.

Step 2: Definition of Network

Time: 8 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher explains what a computer network is, using simple analogies like a road network or a group of friends communicating. The teacher writes the definition on the board.
Pupils’ Activity: Pupils listen attentively, ask clarifying questions, and copy the definition into their notebooks.
Learning Point: Pupils understand the fundamental concept of a computer network.

Step 3: Introduction to Types of Networks

Time: 7 minutes
Teaching Skill: Listing/Classification
Teacher’s Activity: The teacher introduces the three main types of computer networks (LAN, MAN, WAN) and explains that they differ mainly by their size and geographical coverage. The teacher writes the names on the board.
Pupils’ Activity: Pupils listen and note down the names of the network types.
Learning Point: Pupils become aware of the different categories of computer networks.

Step 4: Local Area Network (LAN)

Time: 7 minutes
Teaching Skill: Description/Examples
Teacher’s Activity: The teacher explains LAN, its characteristics, and provides examples such as a school computer lab network. The teacher points to a chart showing a LAN setup.
Pupils’ Activity: Pupils listen, observe the chart, and take notes on LAN definitions and examples.
Learning Point: Pupils understand what a LAN is and where it is used.

Step 5: Metropolitan Area Network (MAN)

Time: 6 minutes
Teaching Skill: Description/Comparison
Teacher’s Activity: The teacher explains MAN, highlighting its characteristics and comparing it to a LAN in terms of size and scope. The teacher provides relevant examples.
Pupils’ Activity: Pupils listen, make comparisons, and note down the key features and examples of MAN.
Learning Point: Pupils grasp the concept of MAN and its typical applications.

Step 6: Wide Area Network (WAN)

Time: 6 minutes
Teaching Skill: Elaboration/Illustration
Teacher’s Activity: The teacher explains WAN, emphasizing its vast geographical coverage and its most common example, the internet. The teacher discusses how WANs connect different MANs and LANs.
Pupils’ Activity: Pupils listen, understand the global reach of WANs, and take notes.
Learning Point: Pupils comprehend the scale and importance of WANs, especially the internet.

Step 7: Evaluation/Review

Time: 5 minutes
Teaching Skill: Questioning/Assessment
Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

1. What is a computer network?
2. List three types of computer networks.
3. Mention two characteristics of a Local Area Network (LAN).
4. Give an example of a Wide Area Network (WAN).

Pupils’ Activity: Pupils answer orally and in writing.
Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 1 minute
Teaching Skill: Summarization
Teacher’s Activity: The teacher briefly summarizes the key points of the lesson on networks and their types. The teacher assigns homework for pupils to research more examples of each network type.
Pupils’ Activity: Pupils listen to the summary and copy down the homework.
Learning Point: Reinforcement of learning and preparation for future study.

Lesson Keywords

• Network – A group of interconnected computers and devices that can share resources.
• LAN – Local Area Network, covering a small geographical area like a home or office.
• MAN – Metropolitan Area Network, covering a city or large campus.
• WAN – Wide Area Network, covering vast geographical areas like countries or continents.
• File Sharing – The process of making files available to other users on a network.

Differentiation

For pupils who grasp the concepts quickly, the teacher can challenge them to identify specific network devices used in each type of network. For pupils needing additional support, the teacher can provide simplified diagrams and allow more time for questions and answers, focusing on the basic definitions and examples.

Note for teachers using this lesson plan

Encourage pupils to relate network concepts to their daily use of mobile phones and internet. Use visual aids extensively to help pupils distinguish between the different network types. Practical examples from the school environment can make the lesson more relatable and engaging.