Computer Studies - Junior Secondary 2

Term: 2^nd Term

Week: 2

Class: Junior Secondary School 2

Age: 13 years

Duration: 40 minutes of 2 periods each

Date:

Subject: Computer studies

Topic:- Units of storage

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

Explain how to convert form one unit of storage to another
Carry out calculations on unit of storage conversion

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

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION	TEACHER’S ACTIVITY	STUDENT’S ACTIVITY
STEP 1 INTRODUCTION	The teacher revises the previous lesson on units of storage	Students pay attention
STEP 2 EXPLANATION	She explains how to convert from one unit to another	Students pay attention and participates
STEP 3 DEMONSTRATION	She carries out calculations on unit of storage conversion	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

UNITS OF STORAGE

THE QUICK AND EASY METHOD TO CONVERT BETWEEN SIZE UNITS

There is a fast and easy way to do any of these conversions. With this method the only number you need to memorize is 1024. The only other thing you need to know is the name and order of the sizes (kilobyte, megabyte, gigabyte, terabyte).

To convert smaller units to larger units (convert bytes to kilobytes or megabytes) you simply divide the original number by 1,024 for each unit size along the way to the final desired unit.

For example, if you want to convert 110,214,321,212 bytes to megabytes, you would divide by 1,024 (to first convert to KB), and then divide by 1,024 again (to end up in MB).

If you wanted to convert to gigabytes, you would divide by 1,024 three times (once to get to KB, once to get to MB, and then once to end up in GB). To convert larger units to smaller units (i.e. take a number of gigabytes and convert it down in to megabytes, kilobytes, or bytes) you simply multiply the original number by 1,024 for each unit size along the way to the final desired unit.

For example, if you want to convert 384 megabytes to bytes, you would simply multiply it by 1,024 two times (first time to convert to KB, and the second time to end up in bytes). If you wanted to convert 14 terabytes to the number of bytes, you would multiply 14 by 1,024 four times

Conversion from one unit of storage to another

Convert 100 kilobytes to megabyte

Since 1024 kilobyte = 1 Megabyte

100kilobyte = 100/1024

= 0.098megabyte

So 100KB = 0.098MB

Convert 2gigabyte to megabyte

Since 1024megabyte = 1 gigabyte

2GB = 2 * 1024 = 2048megabyte

So 2GB = 2048MB

Convert 700mb to bytes

1MB = 1,000,000bytes

700MB = 700 x 1,000,000bytes

= 700,000,000bytes

EVALUATION: 1. Convert

a. 8bytes to words

b.12nibbles to bits?

c. 25bytes to bits?

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively

Computer Studies - Junior Secondary 2 - Units of storage