SS1 Data Processing Lesson Note- Second Term

SS1 Data Processing Lesson Note- Second Term. Learn the fundamentals of information processing, types of data, transmission methods, and the benefits of digital systems. Perfect for senior secondary students.

SS1 Data Processing Lesson Note- Second Term

Comprehensive Scheme of Work on SS1 Data Processing

Scheme of Work Overview

Week-by-Week Topics

• Week 1: Data and Information
• Week 2: The Art of Information Processing
• Week 3: Process of Information Transmission
• Week 4: Medium of Information Transmission
• Week 5: Computer Ethics
• Week 6: Safety Measures
• Week 7: Operating System I
• Week 8: Operating System II
• Week 9: Functions of an Operating System
• Week 10: Revision
• Week 11: Examination

Week 1: Data and Information

Definition of Data:
Data refers to raw, unprocessed facts. It is meaningless until processed into information. Information is an important tool for decision making in any organization.

The type of information gotten and the method or mode of disseminating this information will determine the effectiveness and productivity of any organization or individual.

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Therefore information transmission is the process of sending and receiving information from one place to another at a particular point in time. It is the transfer of information from one the source to a destination through communication media or gadgets.

Types of Data:

1. Qualitative Data: Descriptive information.
2. Quantitative Data: Numerical information.

Classification of Quantitative Data:

• Continuous data
• Discrete data

Examples of Data:

• Numbers, Names, Measurements

Sources of Data:

• Television, Internet, Government documents

Evaluation:

• Define data.
• List two types of data.

Definition of Information:
Processed data that is meaningful and aids decision-making.

Examples of Information:

• Student ID card, Weather report

Sources of Information:

• Internet, Database

Evaluation:

• Define information.
• Differentiate between data and information.

Week 2: The Art of Information Processing

Definition:
Information processing involves the acquisition, recording, organization, retrieval, and dissemination of information.

Procedures for Information Processing:

1. Collation of Information
2. Organization of Information
3. Analysis of Information
4. Interpretation of Information

Advantages of Computers in Information Processing:

• Faster task completion
• High data storage capacity
• Reduced human error

Disadvantages of Computers:

• High initial cost
• Potential job losses

Evaluation:

• Define information transmission.
• List two advantages of using computers for information processing.

Week 3: Process of Information Transmission

Definition:
The process of sending and receiving information using various media or devices.

Sources of Information Transmission:

1. Ancient Methods:  Ancient source of information are methods of transmitting information from person to person and from one place to another at a particular time. e,g,  Drums, Metal gongs, story telling.
2. Modern Methods: Modern Information Transmission Technology has brought about changes and an improved system of information transmission through the use of electronic devices. Internet, Satellite

Advantages of Wireless Communication:

• Faster communication
• Enhanced mobility

Disadvantages of Wireless Communication:

• Security threats
• Potential data loss

Evaluation:

• List two methods of information transmission.
• Explain one modern method.

General Evaluation Questions

1. Define data and information.
2. List two types of data and their examples.
3. Differentiate between electronic and non-electronic information transmission.
4. State two advantages and disadvantages of computers in information processing.

Assignments

Reading Assignment:

• Hiit @ Schools Data Processing for Senior Secondary Education, Pages 8–29.

Weekend Assignment:

1. The unprocessed fact is called _____.
   • A. Data
   • B. Information
   • C. Processing
   • D. All of the above
2. Which of these is NOT a way of organizing data?
   • A. Alphabet
   • B. Location
   • C. Distance
3. Name a non-electronic transmission medium.
   • A. Radio
   • B. Animal Horn
   • C. Internet
4. How many types of data are there?
   • A. 3
   • B. 2
   • C. 6

CLASSIFICATION OF THE MEANS OF TRANSMITTING INFORMATION

Electronic means of information transmission

• Fax Machine: It is a technology that sends copies of documents over the telephone lines. It is an example of digital communication system.
• Telephone/ Mobile Phone: Telephone and mobiles are most commonly used means of communication. They are not only very fast but also link far distant locations within no time.
• Telegraphy: Is a communication system in which information over a wire through a series of electrical current pulse, usually in the form of morse code.
• Television: News and entertainment programmes are broadcasted on television. Television can broadcast both audio and video communication.
• Radio: News and entertainment programmes are broadcasted on radio. Radio can be used only for broadcasting the audio messages to a large audience.
• Satellite: Artificial satellites are used to communicate with very distant locations. They are used to live-telecast matches and programmes worldwide.
• Internet: This is very cheap and reliable means of not only for communication but also useful for employment and education.
• Non electronic means of information transmission: they include Drums, Metal gong, Animal Signs, Horn, Fire lighting etc.

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