Subject : 


Term :




Class :



Previous lesson : 

The pupils have previous knowledge of Computer System 

Topic :


Behavioural objectives :

At the end of the lesson, the pupils should be able to

  • define a computer network
  • mention types of computer network
  • say the importance of computer network


Instructional Materials :

  • Wall charts
  • Pictures
  • Related Online Video
  • Flash Cards
  • A Desktop computer of Laptop

Methods of Teaching :

  • Class Discussion
  • Group Discussion
  • Asking Questions
  • Explanation
  • Role Modelling
  • Role Delegation


Reference Materials :

  • Scheme of Work
  • Online Information
  • Textbooks
  • Workbooks
  • 9 Year Basic Education Curriculum
  • Workbooks


Content :


A computer network

A computer network is a group of two or more computers that are connected together in order to share resources like hardware, software and data. Computers that are connected through various network can  communicate with one another.

Computer network is the interconnection of computers and other telecommunication devices together for the purpose of sharing resources. There sources that can be shared in such interconnections include: files and folders, programs, printers, hard disk, processor etc. A very popular example of computer network is the Internet which is a computer inter connectivity of various computers on the internet super high way 


When computers are interconnected through a central computer, communication link between users become easier. This could enable them to exchange information freely between each other, and also allow a common use of components.


In a network environment, when there is a centrally located computer to which all other computers are connected, it is called HOSTCOMPUTER or SERVER. The other computers connected to such a computer are called TERMINALS or WORKSTATION.


There are three types of computer network e.g. Local Area Network, Metropolitan Area Network, Wide Area Network.


Computer network is important for the following reasons.

  1. It enables users to access files or programs from another computer without carrying disk.
  2. It enable computer to print documents on a printer attached to another computer
  3. It enables users to be able to send messages by using electronic mail (E-mail).
  4. It can make users to gain easy access to the internet.


There are three types of hardware needed for computer network for the purpose of data communication. They are:

  1. Central processor.

There must be computer otherwise called the HOST Computer that must have a central processor.

  1. Terminals or work stations.

These are the other computers that are connected to a server or central computer.

  1. Communication channels

Communication channels refer to things that could link different systems together. Examples are: cables, telephones, satellite stations, etc.




The topic is presented step by step


Step 1:

The class teacher revises the previous topics


Step 2.

He introduces the new topic


Step 3:

The class teacher allows the pupils to give their own examples and he corrects them when the needs arise




The class teacher wraps up or conclude the lesson by giving out short note to summarize the topic that he or she has just taught.

The class teacher also goes round to make sure that the notes are well copied or well written by the pupils.

He or she does the necessary corrections when and where  the needs arise.



  • Explain the meaning of computer networks
  • Mention two types of computer networks
  • Write out three important of networking
  • What is hardware
  • Mention five computer users




Prepare for the next lesson by reading about computer topology