Computer Studies Scheme of Work for JSS2 First Term

SCHEME OF WORK

Week One: Classification of Computer Systems

Week Two: The Computer System

Week Three: Computer Hardware

Week Four: Computer Software

Week Five: People Ware (Computer Professionals)

Week Six and Seven: Operating System and functions

Week Eight: Number Base System

Week Nine: Conversion of Number Base System

Week Ten: Units of Storage in Computer

Week Eleven: Revision

Week Twelve: Examination

 

Below are the 2022 complete JSS2 First Term Computer Science Lesson Note 

First Term JSS2 Computer Science Lesson Note

Week One: Classification of Computer Systems

INTRODUCTION:

Computers differ based on their data processing abilities. They are classified according to purpose, data handling and functionality. According to functionality, computers are classified as:

• Analog Computer: A computer that represents numbers by some continuously variable physical quantity, whose variations mimic the properties of some systems being modelled.

• Personal Computer: personal computer is a computer small and of low cost. The term “personal computer” is used to describe desktop computers (desktops).

• Workstation: A terminal or desktop computer in a network. In this context, the workstation is just a generic term for a user’s machine (client machine) in contrast to a “server” or “mainframe.” To learn more, click here.

Week Two: The Computer System

INTRODUCTION:

A Computer is an electronic device known to be a very powerful tool for processing data into meaningful information in a faster, neater and cheaper form. The Computer System is one that is able to take a set of inputs, process them and create a set of outputs.

A Computer is a general-purpose device that can be programmed to carry out a set of arithmetic or logical operations automatically. Since a sequence of operations can be readily changed, the computer can solve more than one kind of problem. Conventionally, a computer consists of at least one processing element, typically a central processing unit (CPU), and some form of memory. To learn more, click here.

Week Three: Computer Hardware

INTRODUCTION:

The physical parts of a computer are referred to as the hardware which primarily consists of the system unit and other peripheral devices. E.g monitor, keyboard, mouse e.t.c. Computer hardware (usually simply called hardware when a computing context is implicit) is the collection of physical elements that constitutes a computer system.

Computer hardware is the physical parts or components of a computer, such as a monitor, mouse, keyboard, computer data storage, hard disk drive (HDD), system unit (graphic cards, sound cards, memory, motherboard and chips), and so on, all of which are physical objects that can be touched (that is, they are tangible). To learn more, click here.

Week Four: Computer Software

INTRODUCTION:

Software can be defined as instruction and association data that directs the computer to accomplish a task, sometimes the term refers to a single program. Still, often the term refers to collections of programs and data packed together. 

Software is the applications and programming instructions that tell your computer what to do and enable you to use it for things such as playing games, writing an essay or listening to music. To learn more, click here.

Week Five: People Ware (Computer Professionals)

INTRODUCTION:

Computer professionals are information technology. The definition has extended from those involved in the internet industry to those who deal with the computer industry to develop something. They may design, build, write or sell software. A computer professional is a person who works in the field of 

computer professional may be:

  1. A person working in the field of information technology
  2. A person who has undergone training in computer-related fields, colleges, universities and computer institutes. To learn more, click here.

Week Six and Seven: Operating System and functions

INTRODUCTION:

An operating system (sometimes abbreviated as “OS”) is the program that, after being initially loaded into the computer by a boot program, manages all the other programs in a computer. The other programs are called applications or application programs.

The application programs make use of the operating system by making requests for services through a defined application program interface (API). In addition, users can interact directly with the operating system through a user interface such as a command language or a graphical user interface (GUI). To learn more, click here.

Week Eight: Number Base System

INTRODUCTION:

A computer or any digital system works in a binary manner. The main number of systems used in digital hardware are as follows.

DECIMAL NUMBER SYSTEM: The decimal number system (base10) number system has ten as its base. It uses various symbols called digit for ten distinct value (0,1,3,4,5,6,7,8 and 9) to represent numbers. It requires 10 different types of an electronic pulse.

The decimal system is a position number system. It has a position for the unit, tens, hundred e.t.c The position of each digit conveys the multiplier ( a power of ten) to be used with the digit- each position has a value of ten times of a position to its right. To learn more, click here.

Week Nine: Conversion of Number Base System

INTRODUCTION:

To convert a decimal number to its binary equivalent, follow these five steps

Step 1 The decimal number is divided by 2 (base of binary number)

Step 2 The reminder is written in the one place

In step 3 the result is again divided into two

Step 4 its reminder is written in the next place to the left

The process is repeated until the number becomes zero. To learn more, click here.

Week Ten: Units of Storage in Computer

INTRODUCTION:

The most common unit of storage in a computer is called a byte which is equal to 8 bits. Computer memory is made up of millions of bytes. All data and information fed into a computer, as well as the program that comes pre-loaded, is stored in form of bytes.

Each byte resides temporarily on the computer memory and this specific location is called an address.

Different computers have different sizes of memory. The size of computer memory is stated by the manufacturer in terms of a byte. To learn more, click here.

Week Eleven: Revision

This week, we would be doing a revision of all that we learned during the term.

Week Twelve: Examination

Afterwards, you would write an examination, which would test your knowledge of what has been taught so far.