Parts of a System Unit and Input Devices I. Objectives: At the end of the lesson a successful student will be able to:
1. Define the input devices and parts of a system unit. 2. Recognize the input devices and parts of a system unit. 3. Classify the input devices and parts of a system unit. II. Subject Matter: a. Topic: Parts of System Unit and Input Devices b. Materials
Laptop, Overhead projector, Materials in demo teaching c. References K-12 CHS Module and Internet
III. Procedure: Teacher’s Activity
A. Daily Routine Before we start our discussion for today let us ask the guidance of our Lord. (The teacher will click the presentation prayer.)
Greetings: Good Day class.
Student’s Activity
(The students will feel the presence of the Lord.)
Good Day Ma‟am
Before you take your sit kindly pick up all trashes on the floor and arrange your chair. Checking of attendance: May I ask the Ma‟am, no one is absent for today. toda y. class president to report today‟s attendance.
Teacher’s Activity B. Review Before we proceed to our next topic let us have a short recap about our topic last meeting. Who can recall what is our topic last meeting? Very Good. What is an operating system?
Exactly! Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers. What are the classifications of operating system? Kindly enumerate.
Very Good. C. Motivation Divide the class into three groups. Each group has one representative to play the “Pinoy Henyo Game.” (The teacher will explain the rules of the game.) D. Presentation Based on the words you guessed a while ago, do you have any idea of our topics for today?
Student’s Activity
Our topic last meeting is about operating system.
The operating system is the most important program that runs on a computer.
Multi-user allows two or more users to run programs at the same time. Multiprocessing supports running a program on more than one CPU. Multitasking allows more than one program to run concurrently. Multithreading allows different parts of a single program to run concurrently and real time responds to input instantly.
The students will form three groups. Each group will have a one representative. The y will listen to the rules and regulation of the game.
Ma‟am, parts of a system unit and input devices.
Teacher’s Activity
Student’s Activity
Very Good. Our topic for today is about the parts of system unit and input devices. Before we discuss the parts of a system unit let us define first what is a system unit. Who can define it? Very Good. Here are the parts of system unit, first is the motherboard. Kindly read.
System unit is the main part of a desktop computer, it sometimes called a chassis.
The main circuit board of a computer.
Thank you. Motherboard contains all the circuits and components that run the computer. Next part of system unit is the CPU or the central processing unit. What is the other term for CPU?
Ma‟am microprocessor.
Very Good! The processor is the main brain or heart of a computer system. What are the other parts of system unit?
Memory is the computer's working storage space that holds data, instructions for processing and processed data (information) waiting to be sent to secondary storage.
Very Good! There are two types of memory. What are those?
Ma‟am, the two types of memory is RAM or random access memory and ROM or read only memory.
Your right. RAM is volatile while ROM is non-volatile. The next parts of system unit is the expansion bus, Adapter enables the computer to use a peripheral device for which it does not have it is the pathway between several hardware the necessary connections or circuit boards. components inside or outside a computer. Can you give another one?
Teacher’s Activity
Student’s Activity
Very Good. They are often used to permit upgrading to a new different hardware. The other one is the power supply unit. It converts 120vac (standard house power) into DC voltages that are used by other components in the PC. What is the parts of system unit that used as permanent storage for data?
Ma‟am hard disk drive.
Very Good! Also known as hard drive is a magnetic storage device that is installed inside the computer. What is the last part of a system unit?
Ma‟am optical disk drive.
Very Good. An optical drive is a storage device that uses lasers to read data on the optical media. Let‟s proceed to the input devices. Do you have any idea what is an input device?
Input device composed of a device that accepts data and instructions from the user or from another computer system.
Excellent idea! There are two types of input device. The keyboard entry and the direct entry. The keyboard entry is where data is inputted to the computer through a keyboard. The keyboard is the first input device developed for the PC. While direct-entry devices create machine-readable data on paper, or magnetic media, or feed it directly into the computer„s CPU. There are three categories of direct entry, what are those? Very Good.
Ma‟am pointing device, scanning device and voice input device.
Teacher’s Activity
Student’s Activity
Pointing device is an input device used to move the pointer (cursor) on screen. Examples are mouse, touch screen, light pen and digitixer tablet. Scanning device also fall on the categories of direct entry. It is device that can read text or illustrations printed on paper and translates the information into a form the computer can use. The last category in the direct entry is the voice input device, it also known as speech or voice recognition systems that allow a user to send audio signals to a computer for processing, recording, or carrying out commands. IV. Generalization
Class, is there anything you want to clarify?
None, Ma‟am.
Will someone shares what he/she has learned for today?
Ma‟am there are eight parts of system unit, the motherboard, CPU, memory, expansion bus, adapters, power supply unit, hard disk drive and optical disk drive.
Very Good. Another? Exactly! What are the tree categories of direct entry?
Ma‟am, I also learn the types of input device. The keyboard entry and direct entry. The pointing devices, scanning devices and voice input devices.
Very Good! Can you give the examples of pointing devices?
Very Good! It seems the you‟ve learned a lot today.
Mouse, light pen, touch screen and digitizer tablet.
Teacher’s Activity
Student’s Activity
V. Application
Given a picture of a system unit, the students will identify each part by labeling it correctly. They will be divided into three groups.
The student will identify each part of a system unit correctly.
VI. Evaluation Matching Type: Match column A with column B and write your answer on a ¼ sheet of paper.
______1. It serves as the brain of computer.
A. Optical disc drive
______2. It is also called primary storage.
B. Keyboard entry
______3. The main circuit board of a computer.
C. Mouse
______4. Most common pointing device used in PC‟s.
D. Power supply unit
______5. Data is inputted through a keyboard.
E. Digitizer tablet
______6. Translates data into a form a computer can use.
F. Scanning device
______7. It is a permanent storage for data.
G. Memory
______8. It converts 120 ac into DC voltages.
H. Hard disk drive
______9. It is a graphics drawing tablet.
I. Motherboard
______10. A storage device that uses a laser.
J. Microprocessor
VII. Assignment 1. What are the output devices? Explain each. 2. What are the storage devices? Explain each.
Reference: Internet
Prepared by: Ariane Jayne D. Roque
