Lesson Notes By Weeks and Term - Senior Secondary 2

Memory Unit

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Term: 1st Term

Week: 2

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. Define Memory unit
  2. List and explain the types of memory

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 CPU

Students pay attention

STEP 2

EXPLANATION

He defines Memory Unit

 

Students pay attention and participates

STEP 3

DEMONSTRATION

He lists and explains the types of memory

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

MEMORY UNIT

Computer memory is the storage space in the computer where the data to be processed and the instructions required for processing are stored.

 

TYPES OF MEMORY

There are basically two major types of memory, which includes:

  1. Primary memory (main memory)
  2. Secondary memory (external storage)

 

  1. PRIMARY MEMORY

Also known as the main memory is the storage in the computer in which data is stored for quick access by the CPU and are connected via a memory bus. The primary memory is divided into two:

i. Random Access Memory (RAM)

The RAM is the volatile memory that temporarily stores data and instruction currently being used by the computer. It is called volatile because the content of it disappears when the computer is turned off or there is loss of power supply.

ii. Read Only Memory (ROM)

The ROM is the non-volatile memory that stores small program that the computer can use to perform some of the basic operations required to initiate the boot process. The content of the ROM are often times stored by the manufacturer of the system and always permanent. Since the content of it can only be read, they are called Read Only. Have you ever seen the black/blue background with some information during the booting process? That’s the content of the ROM being displayed.

 

  1. SECONDARY MEMORY

This is the permanent, non-volatile memory that is not directly accessed by the computer/processor. Before the content of the secondary memory can be used by the computer, it must be copied into the RAM. It has the capacity to store huge amount of data. The secondary storage is the slowest and cheapest form of memory. Examples of secondary storage include Hard Disk (Local Disk), Optical disk (CD, DVD), Floppy Disk, USB flash drive, memory card etc.

 

EVALUATION:    1. Explain the Memory Unit

  1. List and explain the types of Memory

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively