Lesson Notes By Weeks and Term - Primary 3

History of computer III


Subject: ICT

Class: Primary 3

Term: 1st Term

Topic: History of computer III

Subtitle: Developed technology

Learning Objectives:At the end of this this lesson,pupils should be able to:

  1. explain the transmission of early devices to present day computer
  2. state the sequences in computer graduation

Resources and materials:

Scheme of work

Online information

Instructional material: charts

Building Background/connection to prior knowledge: pupils are familiar with the topic in their previous classes.



The history of computing covers the developments from early counting tools such as stone, pebbles and sticks, to devices to aid calculation such as abacus, to modern day computers. Before 20th century, most calculations were done by humans. Early mechanical tools to help humans with digital calculation followed like the abacus were called calculating machines now known as calculator.

Computers were first made basically to calculate, but now we use computer to search for information, input information and retrieve information.

Sequences of computer graduation

Sequence of computer can also be called generations of computers. Generations of computers are the stages the computer has passed through before becoming what we now have as computers. There are five stages of development or generations of computer. Each stage of development is a generation of the computer. 

First generation computers

When computers were first made, they were large and costly. They gave out heat when used. They were also slow in making calculations and could only store very few items of information. They also needed much electricity before they could be used.

Second generation computers

Soon, the large, costly and slow computers were no longer used by many people. New computers which were cheaper and smaller than the first ones had been made. These were the second-generation computers. These new computers stored many more items of information than the earlier computers. They also used less electricity and were faster than the first generation.

Third generation computers

In the third-generation computers, the electric pathways were all joined together as one and moved very fast, inside the computers. This was called an integrated circuit. The third-generation computers were cheaper, smaller and faster than the second- generation computers. They also used less electricity and gave out less heat when used.

Fourth- generation computers

The type of computers we use today are the fourth-generation computers. The electric pathways are even more completely joined together inside the computers. The large-scale integrated circuits have made the fourth- generation computers better than all the earlier ones. They are smaller, cheaper and store more items of information than the third- generation computers, used less electricity, faster and well known all over the world.

Fifth generation computers

The makers of computers are still working hard to make even better computers. These are the fifth generation computers. They are the next generation of computers. Scientists think that these computers will act like human beings.


Strategies& Activities:

Step1:Teacher revises the previous topic.

Step2:Teacher introduces the new topic.

Step3:Teacher explains the new topic.

Step4: Teacher welcomes pupils’ questions.

Step5: Teacher evaluates the pupils.

Assessment & Evaluation:

  1. Which generation of computer is being used in school?
  2. How many generations of computers do we have?

WRAP UP(CONCLUSION) Teacher goes over the topic once again for better understanding.


  1. Which generation of computer were electricity pathway join together?

Which generation of computer gave out heat when used, used much electricity and were slower ?

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