Computer Science Lesson Notes JSS1 Third Term
Scheme of work
Week 1
Topic: Revision of Last Term’s Work
Computer Science JSS 1 Week 2
Topic: Important Tool For Processing Data
Week 3
Topic: The Device
Week 4
Topic:Types and Uses Of Computer
Week 5
Topic: Fundamental Computer Operation
Week 6
Topic: Internal Features of the System Unit
Week 7
Topic: Screen Pointing Devices
Week 8
Topic: Mastery of the Keyboard
Computer science lesson note for jss1
Below are the 2022 complete computer science lesson notes for jss 1 third term
Week 1
Topic: Revision of Last Term’s Work
Computer Science JSS1 Third Term
Week 2
Topic: Important Tool For Processing Data
Data are raw fact given to the system to process in order to obtain information. Data are referred to as unprocessed information
Information is the result to obtain from a processed data. Information is referred to as PROCESSED DATA. Although data and information are used interchangeable but there are still differences.
Data are input into the computer system while information is displayed or painted out of the computer system.
However, many tools such as finger, abacus, and Napier logarithms e.t.c can be used to process data into information computer system is the best of all these tools because of the following reasons
- Accuracy: Computer has high degree of accuracy. Therefore any data processed with computer system is being processed with high degree of accuracy.
- Reality: Computers are the most reliable machine that has ever. Exist in human history therefore any information obtained from computer processed data is highly reliable.
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Week 3
Topic: The Device
A device is any machine or tools used for a particular purpose. It is a tool used to perform a specific function.
It is an object, machine, or piece of equipment that has been made for some special purpose. In the context of computer technology, a device is a unit of hardware , outside or inside the case or housing for the essential computer (processor, memory, and data paths) that is capable of providing input to the essential computer or of receiving output or of both. When the term is used generally (as in computer devices ), it can include keyboards, mouses, display monitors, hard disk drives, CD-ROM players, printers, audio speakers and microphones, and other hardware units. Some devices such as a hard disk drive or a CD-ROM drive, while physically inside the computer housing, are considered devices because they are separately installable and replaceable. With notebook and smaller computers, devices tend to be more physically integrated with the “non-device” part of the computer.
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Week 4
Topic:Types and Uses Of Computer
Types of Computer
- Analog Computer: Analog computers are computer that operate on value represented in form of continuous variables. That is, they are used for measuring physical condition, such as temperature, speed, pressure, e.t.c example are thermometer, barometer, volt meter, speedometer.
- Digital Computer: Digital computers are computer that operate on data that represented in the form of discrete values. i.e they operate on digits or number. They are used for performing mathematical and logical operation on data. E.g. digital computer, programmable calculator, digital wrist watches, score board
- Hybrid Computer: Hybrid computers are computer that combine they operation of analog and digital computer. That is they are used for both measurement and calculations. They are used in a specialized area such as scientific and technical application as well as researched institute. E.g. dispenser, exploration machine, weather forecast equipment.
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Computer Science Lesson Notes JSS1 Third Term
Week 5
Topic: Fundamental Computer Operation
System start-up (switching on a computer). All computer component, cable and devices must be connected together, before switching on a computer system. To switch on the computer, simply press the power button on the system unit
When you switch on your computer system, the computer verifies its entire component in order to make it ready for performing operation. This process is called booting
Types Of Booting
There are two types of booting
- Cold Booting: Cold booting is the process of turning on the computer system for the first time. This is done by pressing the power button on the system unit and monitor.
- Warm Booting: warm booting is the process of re-booting the already booted system without switching of the computer; the short cut is CRT, ALT + DEL keys to be pressed.
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Week 6
Topic: Internal Features of the System Unit
(CPU)The central processing unit is the brain of the computer system. It is responsible for all processing activities that take place within the computer system. It is also responsible for processing data given meaningful information.
Components of the CPU
The CPU consist of the three components
- The Control.
- The arithmetic and logic unit: this is the unit responsible for carrying out an arithmetic operation such as addition, subtraction, multiplication and division on data. It also carries out logical operation such as comparing two items ( e.g >, <, =, etc)
- Main memory: this is the unit that supervise, control and coordinates the execution of the program in a correct order.
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Computer Science Lesson Notes JSS1 Third Term
Week 7
Topic: Screen Pointing Devices
A pointing device can be define as any hardware component that allows the user to input spatial data into the computer using physical gesture such as point click and drag.
Types of Pointing Devices
There are several pointing devices which are
1. Mouse: Mouse is an input device that is used for controlling the cursor on the computer monitor in order to point and select object or give command on the computer screen. It is usually placed on a mouse pad.
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Week 8
Topic: Mastery of the Keyboard
Definition of Keyboard
The Keyboard is an input device. It is used to send data into the computer system for processing. The keyboard is used to communicate with the computer. It is used to enter data into the computer in form of digits, alphabets, symbols. A computer keyboard is an input device used to enter characters and functions into the computer system by pressing buttons, or keys. It is the primary device used to enter text. A keyboard typically contains keys for individual letters, numbers and special characters, as well as keys for specific functions. A keyboard is connected to a computer system using a cable or a wireless connection.
Types of Keyboard
There are two major types of keyboard which are
- Standard Keyboard: The standard keyboard has less than 100 keys. It has 10 function keys labeled f1, f2, f3 —— f10 arranged vertically on the right side of the keyboard.
- Enhanced Keyboard: An enhanced keyboard contain about 101/102 keys. It has twelve function key labeled f1, f2 ——– f12 arranged horizontally at the top of the keyboard.
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