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
– 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
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
-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
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