Term: 2nd Term
Week: 8
Class: Junior Secondary School 1
Age: 12 years
Duration: 40 minutes of 2 periods each
Date:
Subject: Computer studies
Topic:- System unit
SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to
INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source
INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures
INSTRUCTIONAL PROCEDURES
PERIOD 1-2
PRESENTATION |
TEACHER’S ACTIVITY |
STUDENT’S ACTIVITY |
STEP 1 INTRODUCTION |
The teacher revises the previous lesson on output devices |
Students pay attention |
STEP 2 EXPLANATION |
She defines system unit and enumerates both its internal and external features
|
Students pay attention and participates |
STEP 3 DEMONSTRATION |
She explains what the Central Processing Unit(CPU) is and outlines its components |
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
SYSTEM UNIT
The System unit also known as base unit, is the electronic circuitry housed within the computer cabinet. It is the part of the micro computer that contains the Central Processing Unit (CPU).
THE INTERNAL FEATURES OF THE SYSTEM UNIT
The main body of a personal computer typically consists of a plastic/metal enclosure containing the following:
CENTRAL PROCESSING UNIT
The CPU is a processing device found inside the system unit. It is mounted on the motherboard which is also inside the system unit. The function of a CPU is to perform the processing of data received from the input devices. The major components of the CPU are as follows:
THE EXTERNAL FEATURES OF SYSTEM UNITS
The external parts of system units include:
The power button is pressed to put the system ON or OFF. It is used to start the system from scratch.
Reset button is used to initialize the system. The button is pressed to restart the system.
The key lock is used to PUT ON and OFF the computer. When the key lock is in OFF mode, the system cannot accept data. For the system to accept data, the key lock must be on.
The disk drive is a part or device on which disks are loaded and run. It enables us to use compact disks and diskettes.
A computer has more than one drive e.g.
A: – Floppy disk drive,
C: – Hard disk drive
D: – Compact disk drive etc.
These are sockets on the outside of the system unit into which you can plug a terminal or some other input/output devices. They are the areas where peripheral devices are connected to the system unit. Ports are used to connect the keyboard, the mouse, the monitor, the printer, etc.
EVALUATION: 1. Define system unit
CLASSWORK: As in evaluation
CONCLUSION: The teacher commends the students positively