Lesson Notes By Weeks and Term - Senior Secondary 2

Term: 1^st Term

Week: 3

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 2 periods each

Date:

Subject:      Computer Studies and ICT

Topic:-       Memory Unit

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

1. Differentiate between primary and secondary memory
2. List and explain the units of storage

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, pictures, Data Processing for senior Secondary Education by Hiit Plc, WAPB Computer Studies for Senior Secondary II by Adekunle et  al, On-line Materials.

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION	TEACHER’S ACTIVITY	STUDENT’S ACTIVITY
STEP 1 INTRODUCTION	The teacher reviews the previous lesson on Memory Unit	Students pay attention
STEP 2 EXPLANATION	He differentiates between primary and secondary storage	Students pay attention and participates
STEP 3 DEMONSTRATION	He lists and explains the units of storage	Students pay attention and participate
STEP 4 NOTE TAKING	The teacher writes a summarized note on the board	The students copy the note in their books

 

NOTE

DIFFERENCES BETWEEN PRIMARY AND SECONDARY MEMORY

Primary	Secondary
It is the internal memory	It is the external memory
It is under the direct control of the CPU	It is not directly under the control of the CPU
It cannot be used for massive data storage	It can be used for massive data storage
It is faster than the secondary storage	It is slower than the primary storage
It does not supplement the secondary storage	It supplements the primary storage

 

UNIT OF STORAGE

The storage capacity is the amount of space available for the storage of data in a particular storage media. The storage unit includes:

1. Bits: a bit is a contraction of the word “binary digit” and is denoted with either 1 or 0. A bit is the simplest unit of data storage.
2. Nibble: a nibble is a collection of 4 bits
3. Byte: a byte is a collection of 8 bits
4. Word: a word is 2 bytes
5. Kilobyte: a kilobyte is 1024 bytes (1000 bytes approximately)
6. Megabyte: a megabyte is 1048576 bytes i.e. 1024²bytes (1 million bytes approximately)
7. Gigabyte: a gigabyte is 1073741824bytes i.e. 1024³bytes (1 billion bytes approximately)
8. Terabyte: a terabyte is 1099511627776 bytes i.e. 1024⁴bytes (1 trillion bytes approximately)

 

EVALUATION:    1. State three differences between the primary and                                         secondary memory

2. List and explain the units of storage

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively