Introduction to Digital Technologies – JSS1 Digital Technologies Lesson Note (First Term)

Class: JSS 1

Subject: Digital Technologies

Topic: Introduction to Digital Technologies

What is digital technology?

Digital technology is the use of electronic tools, systems and devices that create, store or process data as numbers.

• Old way: parents used cassette tapes to play music and film rolls to take photos.
• New way: one smartphone can play music, take photos and send messages.
• Analogue tools: older tools work with physical parts, such as the gears in a mechanical clock.
• Digital tools: they use a “language” of two numbers, 0 and 1, to get things done.

Behavioural objectives

By the end of the lesson, students should be able to:

1. Define digital technology.
2. List common digital devices.
3. Explain the difference between analogue and digital technology.
4. State four reasons why digital technologies matter.
5. Describe how digital technology is used in hospitals, banks and transportation.

What are examples of digital devices?

A digital device is an electronic machine that works with data in the form of 0s and 1s.

• Smartphones and tablets: used for calls, messages, photos, games and learning.
• Laptops and computers: used for typing, research, calculations and storing files.
• Smartwatches: worn on the wrist to show time, count steps and receive messages.
• Digital cameras: take photos and videos and save them on a memory card.
• ATMs: bank machines that give out cash and show account balances.
• Digital calculators: show the answer to a sum as numbers on a screen.

What is a bit?

A bit is the smallest unit of data in a digital device, and it is either 0 or 1.

• 0: stands for “off”.
• 1: stands for “on”.
• Use: a digital device joins many bits together to represent letters, numbers, pictures and sounds.

What is the difference between analogue and digital technology?

Before everything became “digital”, we had analogue. Knowing how they differ explains why digital tools are so popular today.

What is analogue technology?

Analogue technology represents information as a continuous signal.

• Example: a traditional wall clock with moving hands.
• How it works: the hands move smoothly and constantly around the circle.
• Other examples: cassette tapes, vinyl records and a mercury thermometer.

What is digital technology (compared with analogue)?

Digital technology breaks information into separate values made of bits (0s and 1s).

• Example: a digital watch that shows exact numbers, such as 10:30.
• How it works: it does not “slide” between times. It jumps from one clear value to the next.
• Other examples: smartphones, digital cameras and digital calculators.

Table: analogue compared with digital

Why do digital technologies matter?

Digital technologies matter because they have changed the way we live, learn and play.

1. Faster communication: a letter once took weeks to arrive. A WhatsApp message or email gets a reply in seconds.
2. Better ways to learn: e-learning lets you watch educational videos on YouTube or join a class from home using a tablet.
3. Saving and finding information: one phone or memory card can hold thousands of books instead of 20 heavy textbooks, and searching is easy.
4. Entertainment: you can stream movies and music whenever you want, without waiting for a TV timetable.

How is digital technology used in everyday life?

Digital technology is used in almost every part of society, including health, banking and travel.

• In hospitals: doctors use digital machines to scan the body and see what is wrong inside without surgery.
• In banks: people use ATMs to get money and mobile apps to send money to relatives instantly.
• In transportation: pilots use digital maps and GPS to fly planes safely across the world.
• In schools: students and teachers use computers, projectors and learning apps.

What are the limits of digital technology?

Digital technology has benefits, but users must also know its limits.

• Power: most digital devices need electricity or a charged battery to work.
• Cost: some devices and data bundles are expensive.
• Distraction: too much time on games and social media can reduce study time.
• Safety: users must protect passwords and personal information online.

Evaluation

1. Define digital technology.
2. Name four examples of digital devices.
3. State two differences between analogue and digital technology.
4. Give two reasons why digital technologies are important in society.
5. Describe one way digital technology is used in a hospital.

Assignment

1. Look around your house. List three (3) things that are analogue and three (3) things that are digital.
2. Say which type you prefer using, and give one reason.