**COMPUTER STUDIES SCHEME OF WORK FOR SS2**

**COMPUTER STUDIES SCHEME OF WORK FOR SS2** **FIRST TERM**

**1. CENTRAL PROCESSING UNIT(CPU)**

-Arithmetic and logic unit and control unit

-Function of ALU and Control unit

-Teacher leads students to list CPU components e.g. ALU, Control unit, etc.

-States functions of ALU and control unit e.g. explains ALU- accept and executes any arithmetic and logic operations while control unit controls all operations inputted to the system.

**2. MEMORY UNIT**

-Types of memory

-Description of:

i) Primary memory

ii) Secondary memory

– Teacher leads students to list types of memory e.g.

i) Primary memory(main memory)

ii) Secondary memory(auxiliary)

-Description of: primary memory

i) Random access memory(RAM)

ii) Read only memory(ROM)

Secondary memory:

Flash drive, hard disk, compact disk(CD), digital video disk (DVD)

**3. MEMORY UNIT**

-Differences between primary and secondary memory

– Teacher leads students to display auxiliary storage devices as

secondary storage e.g. floppy disk, flash drive, compact disk, etc.

-Units of storage:

Bits, nibble, bytes, kilobytes(KB), megabytes(MB), gigabytes,(GB),

terabytes (TB)

**4. MEMORY UNIT**

i) Conversion from one unit to the other

ii) Comparison of auxiliary storage devices.

– Teacher leads students to compare presently available storage devices(size, memory

capacity) e.g. size, speed, technology(optical, magnetic and

semiconductor)

– Teacher leads students to carry one simple arithmetic on

conversion from one unit to another. E.g. 1Kilobyte (KB)=1000 bytes etc.

**5. LOGIC CIRCUITS**

-Definition of logic gate

-Types of logic gates

– Teacher leads students to define logic gate

-Guides students to list types of logic gates e.g. AND, NOT, OR, by

the use of drawing charts.

**6. LOGIC CIRCUITS**

-Symbols of each logic gate

-Input and output signals for AND, NOT, OR gates.

-Displays symbols of logic gates on a chart

– Teacher guides students to identify the signals in each gate

symbol.

**7. LOGIC CIRCUITS**

-Truth table construction for AND, NOT, OR

-Equation for: AND, NOT,OR gates.

– Teacher guides students to construct truth table for gate

-Write logic equations, etc

**8. LOGIC CIRCUITS**

-Uses of logic gates

-Logic circuits II(AL)Alternative logic gates)

– Teacher leads students to state the differences among the three

gates

-As building blocks for hardware/electronic components.

-Description of alternative logic gates.

**9. ALTERNATIVE LOGIC GATES II**

-Types of alternative logic gates

-Symbols of each logic gate

-Input/output signals

– Teacher leads students to list types of alternative logic gates,

e.g. NAND, NOR, etc.

-Displays symbols of alternative logic gates on a chart

-Guides students to identify the signals in each gate symbol, i.e.

NAND, NOR.

**1O. ALTERNATIVE LOGIC GATE II**

-Truth table construction

-Equation for: NAND, NOR gates

-Uses of logic gates

– Teacher guides students to construct truth table for each gate:

i.e. NAND, NOR

-Write a logic equation for each

-Uses of logic gates: As building blocks for hardware or electronic

components etc

-Construction of simple comparators using NOR/NAND, XOR gates

**11. COMPUTER DATA CONVERSION**

-Definition

-Types of registers

-Function of each register and main memory

– Teacher leads students to define:

i) Register

ii) Address

iii) Business

– Teacher guides students to list types of MDR, CIR, and SQR.

-State the functions of each register and main memory.

**12. COMPUTER DATA CONVERSION**

-Differences between register and main memory

-Outline steps

-Factors affecting speed data transfer

– Teacher guides students to identify differences between

register and main memory

-Outline steps in data conversion e.g. ‘data-fetch-execute’ cycle in a simple form.

-States factors affecting data transfer: BUS-Speed, BUS-Width,

etc.

**13. Revision Revision**

**14. Examination Examination**

**COMPUTER STUDIES SCHEME OF WORK SS2 SECOND **TERM

**1. CONCEPT OF COMPUTER FILES**

-Definition

-Types of data items

-File structure organization

– Teacher leads students to define each term

i) Computer

ii) Record

iii) Field

iv) Data item

-Guides students to list the types of data item: numeric, alphabetic, alpha-numeric

-File structure organization(from dataitem)

**2. CONCEPT OF COMPUTER FILES**

-Type of file organization

-Methods of accessing files

-Classification of file

– Teacher leads students to list types of file organization

i) Serial

ii) Sequential

iii) Indexed

iv) Random

-Methods of accessing of files, e.g. as above

-Classification of:

i) Master file

ii) Transaction file

iii) Reference file

-Criteria for classifying files: Nature of content.

-Organization method

-Storage medium

**3. HANDLING COMPUTER FILE:**

**–**Basic operation on computer files

-Steps involved in creating

sequential file

-Steps involved in accessing sequential file above using basic file

– Teacher guides students to list basic operations on computer files, e.g. creation, deletion, copy, retrieval, view, update, open, close.

-Outlines steps involved in file creation using BASIC processing statements e.g. Exam file with math and English and

hands-on-experience(H-O-E)

-Outline steps involved in file accessing using BASIC processing statements.

**4. HANDLING COMPUTER FILES**

**–**Basic file processing

-Effect of file insecurity

-Methods of file security

-Describes file insecurity and its effects

i) Data loss and is causes

ii) Over writing

-Leads students to mention file security methods:

i) Use of back ups

ii) Use of antivirus

iii) Password

iv) Proper label of storage devices, etc.

**5. HANDLING COMPUTER FILES**

-Difference between computer files and manual files

-Advantages of computerized files

-Limitations

– Teacher lead the discussion to identify differences between computer files and manual filing system

-Advantages are: more secured, fast to access, less laborious, more reliable, neatly modified

-States limitation of computerized file e.g. Expensive to set it up,

-Irregular power supply, etc.

**6. LOGIC CIRCUITS**

-Symbols of each logic gate

-Input and output signals for AND, NOT, OR gates.

-Displays symbols of logic gates on a chart

-Guides students to identify the signals in each gate symbol.

**7. LOGIC CIRCUITS**

-Truth table construction for AND, NOT, OR

-Equation for: AND, NOT,OR gates.

– Teacher guides students to construct truth table for gate

-Write logic equations, etc

**8. LOGIC CIRCUITS**

-Uses of logic gates

-Logic circuits II(AL)Alternative logic gates)

– Teacher leads students to state the differences among the three gates

-As building blocks for hardware/electronic components.

-Description of alternative logic gates.

**9. ALTERNATIVE LOGIC GATES II**

-Types of alternative logic gates

-Symbols of each logic gate

-Input/output signals

– Teacher leads students to list types of alternative logic gates, e.g. NAND, NOR, etc.

-Displays symbols of alternative logic gates on a chart

-Guides students to identify the signals in each gate symbol, i.e. NAND, NOR.

**1O. ALTERNATIVE LOGIC GATE II**

-Truth table construction

-Equation for: NAND, NOR gates

-Uses of logic gates

– Teacher guides students to construct truth table for each gate: i.e. NAND, NOR

-Write a logic equation for each

-Uses of logic gates: As building blocks for hardware or electronic components etc

-Construction of simple comparators using NOR/NAND, XOR gates

**11. COMPUTER DATA CONVERSION**

-Definition

-Types of registers

-Function of each register and main memory

-Leads students to define:

i) Register

ii) Address

iii) Business

-Guides students to list types of MDR, CIR, and SQR.

-State the functions of each register and main memory.

**12. COMPUTER DATA CONVERSION**

-Differences between register and main memory

-Outline steps

-Factors affecting speed data transfer

-Guides students to identify differences between register and main memory

-Outline steps in data conversion e.g.

‘data-fetch-execute’ cycle in a simple form.

-States factors affecting data transfer:

BUS-Speed, BUS-Width, etc

13 Revision Revision

14 Examination Examination

**COMPUTER STUDIES SCHEME OF WORK SS2 THIRD TERM**

**1. ALGORITHMS AND FLOW CHART**

-Definition

-Characteristics of Algorithms

-Functions of Algorithm

– Teacher leads students to define algorithm and flow chart

-List the functions of algorithm

– Teacher guides students to list characteristics of algorithm, e.g. finite, effective and unambiguous, etc

**2. ALGORITHM AND FLOW CHART**

-Writing algorithm for solving a given problem.

Teacher guides students to write a simple algorithm for:

-Computing average of a given set of numbers

-Evaluation of equation: Y=a (b-c)2/d+2.

-Printing out the first ten odd numbers etc.

**3. ALGORITHMS AND FLOW CHART**

-Flow chart symbols

-Use of each flow chart symbol

-Demonstrate flow chart symbols: I/O, process, decision, etc

-States what each symbol represent

-Guides students to draw appropriate flow chart to solve a given problem.

**4. BASIC PROGRAMING II**

-Build in functions

-Basic notations

Teacher leads students to identify build-in functions:

i) SQR ii) INT(X) iii) SIN(X) iv) ABS(X) v)RND(X) vi) COS(X) vii) TAN(X) viii) LOG(X) ix) EXP(X)

**5. BASIC PROGRAMMING II**

-Basic notation

-Basic notation of algebraic expressions

i) /2a

ii) (x-y) (x+y)

iii) (a+b)+c/sin d

iv) b=1/4ac

v) ex+y -Sin(x+ny), etc.

**6. BASIC PROGRAMING II**

Write a basic program to compute algebraic equations

Teacher leads students to write BASIC programming using built in functions:

i) Find square root, S, round up to an integer

ii) Find square root of numbers with a given range.

iii) Find the cosine of known values

iv) Find the tangent of a given angle

v) Plot sine wave curve, plot cosine curve.

**7. A INTERNET**

Definition and some computer internet terms

-Teacher leads students to define:

i) Internet

ii Some basic terms:

Browse, browser, chart room, cyber café, cyber space, download.

**7. B INTERNET**

Definition of internet and some basic terms

– Teacher guides students to define some basic terms:

Home page, HTML, HTTP, Intranet, Internet service provider, upload, protocol, web browser, web page, website.

**8. INTERNET**

Main browsers:

– Features in main browsers

– Teacher leads students to list the main browsers:

i) Internet explorer

ii) Netscape navigation

iii) Opera

iv) Firefox

-Leads students to list the features in main browser, window, title bar, menu bar, tool bar, address bar, etc.

**9. INTERNET**

Internet services

-ITeacher instructs students to visit some websites

Write notes on the board on what they learnt on their visit website, e- mail.

-Email discussion group

-Telnet

-Usenet

-FTP

-WWW, etc

**10. ELECTRONIC MAIL(E-MAIL SERVICES)**

-Definitions

– Teacher leads students to define:

i) Electronic mail

ii) E-mail; services

a. Sending/receiving e-mail

b. Charting

iii) Steps involved in operating mail box

iv) Steps involved in creating e-mail account.

**11. ELECTRONIC MAIL(E-MAIL SERVICES)**

-Features in an e-mail address

-Definition of charting

– Teacher guides students to write e-mail and website addresses and identify the differences in their features e.g.

i) finemail@finegoving.org e-mail address

ii) http://www.finegoving.org website

-Definition of chatting

-Steps involved in chatting.

**12 Revision Revision**

**13 Examination Examination**