Lesson Notes By Weeks and Term - Senior Secondary 1

Introduction to data processing

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Term: 1st Term

Week: 1

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 2 periods each

Date:       

Subject:      Data Processing

Topic:-       Introduction to data processing

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

  1. Explain the meaning of data and information
  2. Differentiate between data and information
  3. Define data processing
  4. Distinguish between manual and electronic data processing

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 students’ knowledge about the word “data processing”

Students pay attention

STEP 2

EXPLANATION

He explains the meaning of data and information and differentiates them

 

Students pay attention and participates

STEP 3

DEMONSTRATION

He discusses the definition of data processing and distinguishes between manual and electronic data processing

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

INTRODUCTION TO DATA PROCESSING

Data means any basic fact which may be input to some processing system.

Information is the end – result of a processing system

 

Differences between data and information

 

Data

Information

1

Data are raw facts that have no specific meaning

Information are processed facts with a purpose and a specific meaning

2

Data is a Latin word means something that is given

Information is a Latin word that means formation or conception

3

Data is independent of the information

Information is dependent on data

4

Data especially raw ones are not enough to make decisions

The information is sufficient to help make a decision in the respective context

DATA PROCESSING

Data processing is the task of using a collection of basic facts to produce

Information. Usually data it has no value in itself until it is subjected to

nalysis, validations and comparisons with other data produce result

(information). For example a collection of weights of individuals is not a

useful information for decision making. However when the set of data is

processed such as searching for individual with a maximum or minimum

weight or the weight of all concerned in the study, information is produced.

Management can decide on the basis of each information to assign special

duties to the fellow with the maximum or minimum weight. Other use could

be made on such information depending upon the situation prevailing on

the organization and their special needs.

Therefore, data processing is an operation on computer data which

involves the entering, sorting, updating and retrieving of information using

computer.

 

PROPERTIES OF DATA

  1. Collected/Captured
  2. Prepared
  3. Presented
  4. Precise
  5. Complete
  6. Accurate
  7. Purposeful
  8. Assigned

 

DATA PROCESSING CYCLE

The data processing cycle describes the stages of data processing. It

involves the following stages:

  • Data gathering
  • Data collation
  • Input stage
  • Processing stage
  • Storage stage
  • Output stage

 

Stages of data processing

INPUT  à PROCESSING àOUTPUT

  1. INPUT: involves three steps; collection, verification/validation and coding
  2. PROCESSING: involves classification, sorting, calculating, converting and storing
  3. OUTPUT: involve retrieving, converting and communication.

 

Differences between manual and electronic data processing

 

Manual data processing

Electronic data processing

1

It relies on people to process data

It relies on an electronic device e.g computer to process data

2

It requires more effort and cost

It doesn’t require a lot of effort and cost

 

 

EVALUATION:    1. Explain the meaning of

  1. data b. information
  2. In tabular form differentiate between data and information
  3. Define data processing using an illustration
  4. Differentiate between manual and electronic data processing

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively