SS 2 COMPUTER STUDIES FIRST TERM LESSON NOTES

First  Term  SS  2

FIRST TERM SCHEME OF WORK

WEEK                   TOPIC

THEME: BASIC CONCEPT OF COMPUTER HARDWARE

1. Revision of last term’s
2. Central Processing Unit (CPU):Central Processing Unit: (i) Arithmetic and Logic Unit ALU (ii) Control Unit. Functions of: ALU and control Unit.
3. Memory Unit:(a) Types of memory: Primary Memory (Main Memory) and Secondary memory (Auxiliary Storage Devices) (b) Description of (i) Primary Memory: Random Access Memory (RAM) and Read only Memory (ROM) (ii) Secondary Memory (i) Floppy Disk (ii) Hard Disk (iii) Flash Drive(iv) Compact Disk (CD) (v) Digital Video Disk (DVD).

4. Memory Unit:(c) Differences between primary and secondary memory (d) Units of storage: Bits, Nibble, Bytes, Kilobytes (KB), Megabytes (MB), Gigabytes (GB) and Terabytes (TB) (e) Conversion from one unit to the other (f) Comparison of auxiliary Storage Devices under: Size, Speed, Technology (optical, magnetic and semiconductor)

THEME: COMPUTER HARDWARE

5. Logic Circuits I (Standard single logic gates): (a) Definition of logic gate (b) Types of logic gates AND, NOT, OR, (c) Symbols of each logic gate: (d) Input/output signals for AND, NOT, OR gates. (e) Truth table construction for: AND, NOT, OR (f) Equation for: AND, NOT, OR gates (g) Uses of logic gates: As building blocks for Hardware/electronic Components.

6. Logic Circuits II (Alternative logic gates): (a) Description of alternative logic gate (b) Types of alternative logic gates NAND, NOR (c) Symbols of each logic gate (d) Input/output signals for: NAND, NOR gates.
7. Logic Circuits II(Alternative logic gates) (Cont’d): (e) Truth table construction for: NAND, NOR, (f) Equation for NAND, NOR , gates (g) Uses of logic gates (i) As building blocks for Hardware/electronic Components, etc. (h) Construction of simple comparator.

THEME: BASIC COMPUTER OPERATION

9. Computer Data Conversion: (a) Definition of (i) Register (ii) Address (iii) Bus (b1) Types of registers: (i) MDR (ii) CIR (iii) SOR (b2) Function of each register to be stated. (c) Differences between register and main memory
10. Computer Data Conversion: (d) Outlines steps in ‘data fetch – execute’ cycle in a simple form. (e) Factors affecting speed of data transfer: (i) Bus speed (ii) Bus width.

REFERENCES:

1. EVANS Computer Science for Senior Secondary schools 2
2. HiiT @ School, Computer Studies for Senior Secondary Education
3. Online with COMPUTERS for Senior Secondary Schools 2 by Adedapo O.