Lesson Notes By Weeks and Term - Senior Secondary 1

Generations of computer I

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Term: 1st Term

Week: 3

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 2 periods each

Date:       

Subject:      Data Processing

Topic:-       Generations of Computer I

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

  1. Discuss the features and characteristics of the first, second and third generations of computer

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, pictures, Data Processing for senior Secondary Education by Hiit Plc, WAPB Computer Studies for Senior Secondary I by Adekunle et al, On-line Materials.

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S ACTIVITY

STEP 1

INTRODUCTION

The teacher reviews the previous lesson on the history of computing

Students pay attention

STEP 2

EXPLANATION

He discusses the features and characteristics of the first and second generation of computers, listing their examples

 

Students pay attention and participates

STEP 3

DEMONSTRATION

He discusses further the features and characteristics of the third generation of computers listing their examples

Students pay attention and participate

STEP 4

NOTE TAKING

The teacher writes a summarized note on the board

The students copy the note in their books

 

NOTE

GENERATIONS OF COMPUTER

The history of computer development is often referred to in reference to the different generations of computing devices.

A generation refers to the state of improvement in the product development process. With each new generation, the circuitry has gotten smaller or miniaturized hence speed, power, and computer memory has proportionally increased leading to new discoveries in the tech world that affect the way we live, work and play.

 

FIRST GENERATION

Electronic machine which was distinct from mechanical computers evolved about 1945. UNIVAC is a good example of this generation of computers.

CHARACTERISTICS OF FIRST GENERATION

  1. They used Vacuum tubes.
  2. They were very large and expensive.
  3. They were very bulky.
  4. They had a low retentive memory.
  5. They generated a lot of heat.

 

SECOND GENERATION

Second generation computers were the replacement of vacuum tubes. Second generation computers utilized primary discrete TRANSISTORS. They had limited capability but were more advanced than the first generation computers.

CHARACTERISTICS OF SECOND GENERATION

  1. They were more reliable than the first generation.
  2. They could perform calculations.
  3. They had a more efficient storage facility.
  4. They generated lesser heat compared with the first generated computers.

 

THIRD GENERATION

Third generation computers utilized INTEGRATED CIRCUIT [ICs] technology, Small Scale Integration [SSI] with more sophisticated software capability like multi-programming, multi-processing and operating systems as resource managers.

CHARACTERISTICS OF THIRD GENERATION

  1. Faster input and output.
  2. Increased storage capability
  3. Increased process capability
  4. Ability to display pictures and musical sound

 

EVALUATION:    1. Discuss the characteristics of the first, second and third generation of computers

  1. Give an example each of first, second and third generation of computers

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively