GRADE THREE COMPUTER STUDIES REVISION NOTE

CPU means central processing unit, it is also called processor or micro processor.

Parts of the CPU:   control unit, arithmetic logic unit,  memory unit. RAM is the main memory,  ROM is where files are saved.

Functions of CPU :  It controls the activities of the computer, it process instructions, it communicates with the devices connected to the computer.

Word processing .
To insert document :    click file, click new and click blank document or press ctrl n.   To insert picture or clipart:   position the cursor to insert clipart,  click insert on menu bar, select picture and click clipart,  click ok.

Disk drive :   it's used for storing data, instructions and information for future use.

Function of disk drive : It is used to store information, ,it carries data easily, back up data.

Types of hard disk :  Parallel advanced technology attachment (PATA),  Serial ATA (SATA), Small computer interface  (SCSI),  Solid state drive  (SSD)

How to load Mavis beacon :   On the computer,  select Mavis beacon icon on the desktop,  select typing game.

Special keyboard keys: Tab key, enter key, Capslock, space bar, F1 -  F12, control key, etc

Drawing :
How to draw shapes using paint package. 
Click shape icon on the menu bar, select tool Eg line tool, colour tool, text tool, cure tool, etc. To add colour,  select the shape or object,  add colour.

Word processing setting :it is the way the micro soft environment is arranged or programmed. Eg tittle  bar, menu bar, task bar.

GRADE TWO COMPUTER STUDIES REVISION NOTE

Printer : It's a device which gives us text and graphics on a paper in black and white or coloured.

Uses of printer : to print letters, labels, question papers, text books etc.
Types of printers  :   impact and non impact printers.

Ms word :  It's a word processing package used to produce text and graphics.

Features of Ms word :    home, insert, page layout,  reference,  mailings, review and view.

 Hardware :  It is the part of the computer that can be seen, touched and feel. (Eg) monitor, keyboard, mouse, printer, projector, scanner etc.

Software : It is the part of the computer that can be seen but can not be touched. (Eg) Mavis beacon, micro soft word, Internet Explorer etc.

Icon: is the tiny pictures on the screen of the monitor.  (Eg) Microsoft paint, Google Chrome, my computer,  micro soft word, etc.

Formatting : It is the re - arrangement of the original appearance of text.

Steps to bold:   Type text, highlight text, click on the bold icon on the top screen of the monitor.

Data storage : It is used to store and record information.  (Eg) hard disk, compact disk, floppy disk, memory card,  etc

Computer games help to improve our typing speed.
Keys to play Mavis beacon computer game are number key, alphabet keys, space bar and punctuation keys like .,?":;!*/  etc.

Types of computers based on types are analogue, digital and hybrid computers

Micro computers are small computers you can use to make and answer calls.
Types of micro computers,  Palmtop, laptop, tablets,desktop and mobile phone.

Computer room is a place where computers are kept.
Items found in the computer room are sets of computers, fan, air conditioner, white board maker, etc.

How to care for computer:   don't bring water or drink close to the computer, clean dust always, switch off the computer after use etc.

GRADE ONE COMPUTER STUDIES REVISION NOTE

Parts of the Computer
System unit: it is the heart of the computer, it looks like a tower. It houses the CPU which is the brain of the computer.

Components of the system unit :   motherboard, hard disk,  cooling fan, RAM slot, processor,diodes, translator, resistors.


Monitor: It shows us text and pictures, it has a screen and it looks like the television.

Mouse: it is used for pointing,  clicking.,double clicking, dragging and dropping. It has two buttons, a cable and a scroll wheel.

Keyboard :  it is used for typing and it has some special keys like space bar, Backspace, Capslock, control keys, shift keys,function keys, number keys and alphabet keys.

Parts of the computer song

Uses of the Computer : It makes our work easier and faster.  Places you can see computers are hospitals, factories, industries, banks, schools, churches,  local government secretariats, etc.



Types of data: Image, text, audio and video data.

GRADE FOUR COMPUTER STUDIES REVISION NOTE

Note: This revision note is an extract of the term’s work. I advise pupils to equally use their notes where necessary based on the area of concentration


Hard ware is the physical device of the computer system we can see and touch.eg. Monitor,
System unit, keyboard, mouse, printer, etc.

System software is an installed program that comes with the computer when the computer is newly bought from the manufacturer. These are programs that operate behind the scenes.
System software is often referred to as the operating system.eg operating system, utility software, language translator, diagnostic routine etc.


Hard copy is the printed document from the computer while software is the unprinted document from the computer.


Language translator is a program that changes the entire set of instructions from high level language to machine
Language.

BIOS: Means input/output system. BIOS holds start up information of the computer system.

DIAGNOSTIC ROUTINE: This is software that starts up when the computer is turned on. It accesses all the hardware connected to the computer and support where necessary.


Operating system is software that controls the overall activity of the computer system.
KEYBOARD SHUTCUT CHECK YOUR NOTE

GRADE FIVE COMPUTER STUDIES REVISION NOTE

Note: This revision note is an extract of the term’s work. I advise pupils to equally use their notes where necessary based on the area of concentration. 


The Mouse is used to point object, select items and programs on the computer screen. Other functions of the Mouse include click, right click, double click, drag etc. The small moving arrow is called a pointer.


Utility programs
i)File compression: This is a software that reduces or shrinks the size of a file.

ii)screen saver: This is a moving image or blank screen on the Monitor if no Mouse or Keyboard actions occurs for a short specified period of time. The time for this action can be adjusted.

iii)Disk scanner: It searches  and removes unwanted files from the computer.

Desktop is the area on the computer screen where the Icons are displayed after the computer has booted.

Applications/functions of the Desktop.
i)It is used to starts a program
ii)It is used to creates a folder
iii)It is used to deletes folder
iv)It is used to shuts down the computer

Recycle Bin is a container that stores deleted files.


Types of Desktop Icons.
1.Object Icons eg.my computer, recycle bin and internet explorer.
2.Shortcut Icon: eg.my document, applications and folder. My document Icon
Contains files and folders that are stored in the computer. File Icon represents saved files in the computer’s memory with an Icon on the Desktop.

Excel application is designed to solve mathematical problems.

Micro soft word is a word processing application used to prepare document.

To protect and unprotect data in excel.
-Protect data
On the menu bar click review
Select protection
Click protect sheet
Type in password
Click ok
Re- enter password
Click ok
Type in sheet     Error message will be displayed.

-Unprotect Data
On the menu bar click review
Select protection
Click unprotect sheet
Type in password
Click ok.


Computer background is also known as the wall paper. This is the image display you see at the back of your desktop.
The formular bar displays the position of the cell pointer.
KEYBOARD SHUTCUT CHECK YOUR NOTE

GRADE TWO MATHEMATICS REVISION NOTE

1. Multiplication of whole    numbers

 Multiplication of numbers using arrays

Multiplication of whole numbers up to 10, by repeated addition.

2. Multiplication of whole number (Cont'd)
 Multiplication of two digit numbers by one digit number with and without renaming

3.Division of whole numbers
Division as repeated subtraction

Division as grouping and sharing

4.Fraction
Meaning of fraction, numerator & denominator

Ordering of fractions

Identifications of halve,quarter,one-third,one-sixth,one-twelveth..

5.Fraction(Cont'd)
Finding equivalent fractions

Counting in whole numbers & fractions

Addition & subtraction of like fractions

Addition & subtractions of unliked fraction

6.Factors
Meaning of Factors
Factors of a big number are the babies of that big number. They are the numbers that can divide the big number without remainder.


Finding factors of numbers

Finding common factors of numbers

7.Multiples of numbers 

8. Story problems on Money

GRADE FOUR MATHEMATICS REVISION NOTE

Squares and Square roots of numbers 

1²=1x1=1
2²=2x2=4
4³=4x4x4=64

1²=1
2²=4
3²=9
4²=16
5²=25
6²=36
7²=49
8²=64
9²=81
10²=100
11²=121
12²=144
13²=169
14²=196
15²=225
16²=256
17²=289
18²=324
19²=361
20²=400
21²=441
22²=484
23²=529
24²=576
25²=625
26²=676
27²=729
28²=784
29²=841
30²=900

Place value of whole and decimal numbers.

Addition and subtraction of decimals 

Multiplication of decimals by decimals and whole numbers

Division of decimal by whole numbers and decimals

Percentages
Changing: 
percentage to fraction,

Fraction to percentage, 

Percentages 

to decimals

Study this table 

 Decimal to percentage

 percentage increase and decrease.

Grade three Mathematics revision Note

Fractions 
Changing improper fractions to mixed numbers

Changing mixed numbers to improper fractions 

Equivalent fractions and reducing fractions to the lowest terms

Addition and subtraction of like fractions 

Addition and subtraction of unlike fractions 

Multiplication of fractions by fractions 

Changing fractions to decimals 

Addition and subtraction of decimals 

Multiplication of decimals

Example 1 

Example 2

Squares and square roots of numbers

1²=1x1=1

2²=2x2=4

1²=1

2²=4

3²=9

4²=16

5²=25

6²=36

7²=49

8²=64

9²=81

10²=100

11²=121

12²=144

13²=169

14²=196

15²=225