Computer Studies - Junior Secondary 1 - Information evolution and communication

Term: 3^rd Term

Week: 5

Class: Junior Secondary School 1

Age: 12 years

Duration: 40 minutes of 2 periods each

Date:

Subject:      Computer studies

Topic:-       Information evolution and communication

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

1. Define information evolution and communications technology
2. List and explain the stages of information evolution
3. Discuss the relationship of computers with information technology

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

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

NOTE

INFORMATION EVOLUTION AND COMMUNICATION

Over many decades now, there are a lot of improvements in the way

information is transmitted. These changes are usually technology based

and driven by the need to transmit information faster with a lesser cost.

Information evolution could be defined as a process of changing from

simple techniques of data and information processing to complex and

advanced methods through inventions and innovations.

Communications technology, also known as information technology, refers

to all equipment and programs that are used to process and communicate

information.

STAGES OF INFORMATION EVOLUTION

1. Invention of Printing: Printing could be defined as a process for

reproducing text and images on paper with ink or toner using a printing

press. Printing and paper were invented in China in 1940, a German

Johannes Gutenberg developed a moveable printer machine which was

used to replace hand printed text. Modern printing started with block

printing. In block printing text and images are carved in woods. The carved

woods are inked and pressed on a paper or textile. It is still in use by

graphic artists to make banners. Books that were written this period were

copied by hand. After block printing, the next was lithography. This is a

method of printing on a smooth surface. It is still in use by most old printers.

modern method includes lithography, Flexographic

2. Invention of Radio: The invention of radio started with the discovery of

“radio waves” – electromagnetic waves that have the capacity to transmit

music, speech, picture and other data invisibly through the air. Many

devices work by using electromagnetic waves including radio, microwaves,

cordless phones, remote controlled toys etc. Radio is a technology of

wireless transmission of information through electromagnetic waves.

3. Invention of Television: Television is based on the principle of

successive transmission of frames through scanning. The first television

was invented by Williams Crooks in 1878 (Black and white) while Radio is a

technology of wireless transmission of information through electromagnetic

waves and was invented by James Clerk Maxwell and Heinrich Harte

developed a theory of electromagnetic wave in 1873. Radio and television

were major agents of social change in the 20th century. It opened windows

to learning other peoples’ cultures. It also brings distant events directly into

the homes of millions all over the world. Radio technology began as

“wireless telegraphy.

4. Invention of the Computer: The ideas of many scientists and engineers

led to the invention of the computer. The computer took several stages

before it come into existence. From the early counting devices to electronic

counting devices. Charles Babbage, an English mathematician, is

considered to be the father of Computer over 150 years ago. He invented a

sophisticated calculating machine and called it the “Analytical Engine”

Babbage’s computer was not finished. He is called the Father of

Computers because the first computers produced were based on his

computation and design.

Linking up Computer with Information Technology

Information technology, refers to all equipment and programs that are used

to process and communicate information such as computers and computer

software to convert, store, protect, process, transmit and retrieve

information.

It merges computing with high-speed communication channels carrying

data, sound and video. This technology has made the world to be seen as

a “Global Village”.

ICT makes it possible to communicate using computers and other

electronic devices.

Computer technology and telecommunication technology were developed

independently, since then, they have fused together to produce a new

hybrid information environment.

EVALUATION:    1. Explain the meaning of

1. Information evolution
2. Communications technology

       2. List and explain all the stages of information evolution

       3. What is the relationship between computer and information technology?

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively