Computer Studies - Junior Secondary 1 - Basic computer operations and concepts

Basic computer operations and concepts

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Term: 1st Term

Week: 2

Class: Junior Secondary School 1

Age: 12 years

Duration: 40 minutes of 2 periods each

Date:

Subject:      Computer studies

Topic:-       Basic computer operations and concepts

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

  1. Discuss the historical development of computers
  2. Give examples of the early counting devices
  3. Enumerate the problems of the early counting devices

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

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S ACTIVITY

STEP 1

INTRODUCTION

The teacher revises the previous lesson on basic computer operations and concepts

Students pay attention

STEP 2

EXPLANATION

She discusses the stages of the historical development of the computer.

She gives examples of the early counting devices

Students pay attention and participates

STEP 3

DEMONSTRATION

She enumerates the problems of the early counting devices

 

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

BASIC COMPUTER OPERATIONS AND CONCEPTS

The historical development of computer is divided in to four (4) stages. These are:

  1. Early Counting Devices
  2. Mechanical Counting Devices
  3. Electro-mechanical Counting Devices
  4. Electronic Counting Devices

 

EARLY COUNTING DEVICES

Early counting device is the use of ancient times, easily available and affordable counting methods and devices to count and perform simple arithmetic operation.

Some of these early counting devices examples are examined below.

  1. Fingers and Toes: The fingers and toes were used for counting, giving account of days and trading. The early man also used their feet to measure.
  2. Pebbles: pebbles are small round stones that were used for counting.
  3. Grains: Grains from the farm such as corn, beans and rice were also used for counting.
  4. Cowries: These are the highly polished, usually brightly coloured shell of small snail found in warm seas. They are used as money and for other counting needs.
  5. Sticks: These include the canes, clubs and shaped woods that were used for measuring land area and for other counting and measuring needs.
  6. Writing on the wall: In early ages, man learnt to use objects like charcoal, mud and limestone to write stroke on the wall for counting.

 

PROBLEMS OF EARLY COUNTING DEVICES

  1. It cannot be used for counting large numbers efficiently.
  2. It occupies space.
  3. t wastes time.
  4. It is not always accurate.
  5. It is difficult to access

EVALUATION:    1. What are the four stages in the development of the computer?

  1. Give four examples of early counting devices
  2. Enumerate three problems of the early counting devices

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively