Lesson Notes By Weeks and Term - Senior Secondary 2

Memory Unit

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Term: 1st 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

  1. List and explain the units of storage

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively