Basic Computer Hardware Components
TITLE:
Basic Computer Hardware Components
PREVIOUS KNOWLEDGE:
Students can identify common household items and understand simple cause and effect.
They know that a phone costs 500 naira in a shop and that a market stall shows prices on a digital display.
OBJECTIVES
By the end of this lesson, students should be able to:
1. Explain what input devices are and give examples.
2. Explain what output devices are and give examples.
3. Explain what processing devices are and give examples.
4. Explain what storage devices are and give examples.
INSTRUCTIONAL MATERIALS:
- A computer or a model of a computer.
- A keyboard, a mouse, a monitor, a printer.
- A small flash drive and a CD.
- A simple diagram of a computer.
CONTENT
Input Devices
In Lagos, when you type a message on a phone keypad, you are using an input device.
An input device is a piece of hardware that sends data into a computer for processing.
The keyboard lets you type letters. The mouse lets you point and click. A microphone records sound. These devices convert your actions into signals that the computer can read.
In a classroom, a teacher may use a scanner to copy a paper handout. The scanner is also an input device. It turns paper into digital data that the computer can store or print.
Output Devices
In a market stall, when a seller shows a price of 500 naira on a digital display, that display is an output device.
An output device shows information that the computer has processed.
A monitor displays images and text. A printer prints paper copies. A speaker plays sound. These devices translate computer data into a form you can see or hear.
A projector can show a lesson on a whiteboard. The projector receives data from the computer and shows it on a larger screen. This helps students see the lesson clearly.
Processing Devices
In a factory, a machine that mixes ingredients uses a motor to move parts. A computer’s processing device, the central processing unit, does a similar job. It carries out instructions and performs calculations.
The CPU is the brain of the computer. It reads instructions from memory, does arithmetic, and sends results back to memory or to output devices.
When you play a game, the CPU decides which character moves and where it goes. It works fast, usually many times a second, to keep the game smooth.
Storage Devices
In a home, you keep your books in a shelf. A storage device keeps data for a long time, even when the power is off. It is like a shelf for digital information.
A hard drive stores files on spinning discs. A solid‑state drive uses memory chips. Both keep data safe until you need it.
A USB flash drive is small and portable. It can hold pictures, music, and documents. When you plug it into a computer, the computer reads the data and can copy it to another device.
Common Mistakes:
- Confusing a keyboard with a monitor.
- Thinking a CPU is a storage device.
- Assuming that a printer can also act as a storage device.
EVALUATION
1. What is an input device and give an example from your school.
2. Name an output device and explain how it shows information.
3. What does the CPU do in a computer.
4. Give two examples of storage devices and describe how they keep data.
5. Match the following devices to their function: keyboard, monitor, hard drive, printer.
SUMMARY
In this lesson we looked at the four main parts of a computer: input, output, processing and storage. We saw how each part helps the computer work. We also learned the names of common devices that belong to each part.
- Input devices let you send information to the computer.
- Output devices let you read or hear the computer’s results.
- The CPU processes information quickly and decides what happens next.
- Storage devices keep your data safe even when the power is off.