Demo Lesson

Code Breakers

Code Breakers Ref 35.1

Learning Objective

Code Breakers Ref 35.1

To be able to understand the basics of binary code, how it is used in computers to process information and apply the concept in writing some words and instructions in Binary

Success Criteria

All: Students can explain the concept of binary code.

Most: Students can convert binary code to letters and vice versa.
Some: Students demonstrate understanding by completing binary-related activities.

Multiple Choice

What is the CPU in a computer?

• A. The brain of the computer

• B. The storage device

• C. The screen

• D. The power supply

Multiple Choice

What two numbers make up binary code?

• A. 1 and 2

• B. 0 and 2

• C. 1 and 0

• D. 10 and 11

Multiple Choice

What letter does the binary code 00001 represent if 1 = A?

• A) A

• B) B

• C) E

• D) Z

Multiple Select

I can understand the basics of binary code, how it is used in computers to process information and apply the concept in writing some words and instructions in Binary

• I need HELP!

• I am nearly there- Just a little help

• Am feeling secure

How do Computers Work?

• A Computer is ran by a Central Processing Unit

(CPU) – it’s like the brain of a computer.

• The CPU is made up of lots of little switches in

it that can be either on or off.
– On = 1
– Off = 0

Code Breakers Ref 35.1

Binary Code

• The CPU only understands ‘Binary Code’
• Everything you put into a computer is

converted to Binary code for the CPU to
understand.

• Binary Code is made of 1’s and 0’s. The

computer translates everything into 1’s and 0’s

Code Breakers Ref 35.1

Cracking the Code

• Binary ‘blocks’ are used so that every input

has a unique code.

• These are blocks of 8 and a mathematical

equation is used to convert this to an input

• For this activity we are going to use blocks of

5, for example, 00001 would equate to the
letter A

16

8

4

2

1

0

0

0

0

1
= 1

Code Breakers Ref 35.1

Examples of how to convert to Binary

• Change these to binary:

98

45

24

14

5

16

8

4

2

1

Code Breakers Ref 35.1

​	​	​	​16	​8	​4	​2	​1
​	​	​	​	​	​	​	​

Draw

Examples of how to convert to Binary

key:

16

8

4

2

1

16

8

4

2

1

Code Breakers Ref 35.1

Multiple Select

I can convert from DECIMAL to BINARY

• I need HELP!

• I am nearly there- Just a little help

• Am feeling secure

Examples of how to Binary to Decimal

16

8

4

2

1

Code Breakers Ref 35.1

​	​	​	​16	​8	​4	​2	​1
​	​	​	​	​	​	​	​

What does this binary code say?

01000

01001

H

?

Why?

01000

00101

8

?

1 = A 2 = B 3 = C

etc.

16

8

4

2

1

0

1

0

0

0

16

8

4

2

1

0

1

0

0

1

Code Breakers Ref 35.1

What letter is this?

Multiple Select

I can convert from BINARY to DECIMAL.

• I need HELP!

• I am nearly there- Just a little help

• Am feeling secure

Your Mission

• Iron Man needs your help in deciphering

the following code:

10100

01000 00101

10011 00101 00011 10010 00101 10100

10000 00001 10011 10011 10111 01111 10010 00100

01001 10011

01000 00001 10111 01011 01001 01110 01001

Code Breakers Ref 35.1

Multiple Choice

What is the CPU in a computer?

• A. The brain of the computer

• B. The storage device

• C. The screen

• D. The power supply

Multiple Choice

What two numbers make up binary code?

• A. 1 and 2

• B. 0 and 2

• C. 1 and 0

• D. 10 and 11

Multiple Choice

What letter does the binary code 00001 represent if 1 = A?

• A) A

• B) B

• C) E

• D) Z

Multiple Choice

Convert the binary code 00101 to its corresponding letter (where 1 = A, 2 = B, etc.).

• A) D

• B) E

• C) F

• D) C

Multiple Choice

Decode this binary sequence to find the word: 00101 01100 01000 01001 01011 (where 1 = A, 2 = B, etc.).

• A) HELLO

• B) WORLD

• C) THERE

• D) BRAIN

Multiple Choice

Write the letter ‘D’ in binary code (where A = 1, B = 2, etc.).

• A) 00100

• B) 00011

• C) 01001

• D) 00101

Your next Extra task

• Can you write the following in binary code:

– Your name
– The name of your school
– The name of your favourite Music group
– The name of the team you support

Code Breakers Ref 35.1

Multiple Select

I can understand the basics of binary code, how it is used in computers to process information and apply the concept in writing some words and instructions in Binary

• I need HELP!

• I am nearly there- Just a little help

• Am feeling secure