ICTED-WIKI

User:Elina Real Teaching lesson plan 1

Subject: Computer Science

Class: 8

Unit:12

Topic: Number system and its types

Time:45 min

No of students: 64

Period: 7th

School: Adarsha Secondary School

Specific Objectives:

At the end of this class, Student will be able to:

  • Undersanding the concepts of number system
  • Explain the binary and decimal number system
  • Convert between decimal to binary number system

Teaching Materials:

  • Marker, dustor and Whiteboard;
  • Laptop and projector.

Introduction:

  • Start by asking a questoions about previous knowledge of Number system;
  • Encourage them to share their thought;
  • Introduce the number system:
  • Number system is a technique to represent and work with numbers is called number system.
  • Decimal number system is the most common number system.
  • Other popular number systems include binary number system, octal number system, hexadecimal number system, etc.

Types:

 
Types of number system
  1. Binary Number system
  2. Decimal number system
  3. Octal number system
  4. Hexadecimal number system

Binary Number System

  • A Binary number system has only two digits that are 0 and 1.
  • Every number (value) represents with 0 and 1 in this number system.
  • The base of binary number system is 2, because it has only two digits.
  • These number represent two logical conditions:TRUE and FALSE.
     
    Binary to decimal conversion

Decimal number system:

  • Decimal number system has only ten (10) digits from 0 to 9.
  • Every number (value) represents with 0,1,2,3,4,5,6, 7,8 and 9 in this number system.
  • The base of decimal number system is 10, because it has only 10 digits.

Binary to decimal conversion

  • Discuss the process of converting Binary to decimal
  • show and practice the some examples:

Example No 1:

Example No 2:

Decimal to Binary Conversion:

  • Discuss the process of converting Decimal to binary
  • Introduce methods like division by 2 and remainders.
  • Show and practice the some examples:

Example 1:

Example 2:

Class-room activity:

  • Assign a class-work for students:

Task 1:Convert 1110 into a decimal

Task 2:Convert (17)10 as a binary number

Task 3:Convert (225)10 into a binary

Task 4:Convert 1001 into decimal

  • Walk around to assist students and answer and questions.

Conclusion:

  • Summarize a key points(Number system , Binary number and decimal number)
  • Encourage the students to ask the questions

Assessment:

  • Define Number system and its type.
  • Convert the following binary number in decimal equivalents:
  1. 00111
  2. 01011
  • Convert the following decimal number in binary equivalents:
  1. (158)10
  2. (260)10
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