1. Do it now activity
Can you work out what the missing symbols are and work out the order they should be in if the table shows smallest to largest KB
kilobyte
TB terabyte
Last lesson we learnt about the units which are used to measure memory in a computer.
GB gigabyte
MB megabyte

2. Learning objectives
List the different units of data and their respective values
Understand how knowing the size of software you want to run can help to make it run more efficiently

3. New Learning Characters Images Sound Instructions ASCII Text Data
Describe how characters are stored in a computer system using ASCII and how this improves efficiency
Decode a message given to you in ASCII
Learning
objectives
New Learning
Characters
Images
ASCII Video
Sound
New learning
Last lesson we found out about how we describe the size of data on a computer system. This might be the file size, the capacity of the hard drive or the capacity of the RAM. Today we will begin to look at how different types of data are actually stored. Some of the kinds of data that is stored on a computer include:
What exactly do we mean by characters? Characters are anything that you can physically type on your keyboard. This includes lower-case letters such as abcdefg, upper-case letters such as ABCDEFG, numbers such as and symbols such as !"£$%^&*. In your book explain what we mean by characters and give examples of each. As we have already learnt, computers don't understand English or any other 'human' language. Instead they work in BINARY literally 1's and 0's, so how can these be used to represent all of the characters that you can type on your keyboard? The answer is ASCII.
Instructions
ASCII Text Data
Numbers Symbols Capacity
Characters

4. Talk Task What is a character? What is ASCII? What is a character set?
Describe how characters are stored in a computer system using ASCII and how this improves efficiency
Decode a message given to you in ASCII
Learning
objectives
Talk Task
What is a character?
What is ASCII?
What is a character set?
How does using ASCII make using a computer easier?
ASCII Text Data
Numbers Symbols Capacity
Characters

5. Learning Development Text to ASCII to BINARY converter ASCII table
Describe how characters are stored in a computer system using ASCII and how this improves efficiency
Decode a message given to you in ASCII
Learning
objectives
Learning Development
Text to ASCII to BINARY converter
ASCII table
This means although you have typed a number on your keyboard it is actually stored with a different BINARY number according to the ASCII code
ASCII stands for American Standard Code for Information Interchange, this is a standard that is used by most computers.
So when I convert my surname to ASCII code my surname becomes Although these numbers would actually be stored in the computer as binary and so my surname would be: That is a bit of a mouthful! Just as well the computer can translate what I type on the keyboard - Marchant - convert it into binary using ASCII code, process it in the way I have instructed (in this case writing it on this webpage) and then convert it back to Marchant so I understand what is displayed on the screen!
ASCII Text Data
Numbers Symbols Capacity
Characters

6. Describe how characters are stored in a computer system using ASCII and how this improves efficiency
Decode a message given to you in ASCII
Learning
objectives
Independent Task
Using the sheet your teacher has given you find out what your name would look like using ASCII code.
Then have a go at the ASCII exercise sheet.
Remember although you will be working with denary numbers the computer would actually store these as binary.
ASCII Text Data
Numbers Symbols Capacity
Characters

7. Independent Task ASCII Text Data Numbers Symbols Capacity Characters
Describe how characters are stored in a computer system using ASCII and how this improves efficiency
Decode a message given to you in ASCII
Learning
objectives
Independent Task
Level 5: Explain how each character is stored on the computer using ASCII code. Level 6: Explain what the computer is actually doing when you type a word on the keyboard and it appears on screen in a word processor.
Level 7: Explain how being able to write characters rather than their binary representation helps to make using a computer more efficient.
ASCII Text Data
Numbers Symbols Capacity
Characters

8. Extension ASCII Text Data Numbers Symbols Capacity Characters Learning
Describe how characters are stored in a computer system using ASCII and how this improves efficiency
Decode a message given to you in ASCII
Learning
objectives
Extension
Completed this? Can you find out what message I have sent to you?
ASCII Text Data
Numbers Symbols Capacity
Characters

9. Describe how characters are stored in a computer system using ASCII and how this improves efficiency
Decode a message given to you in ASCII
Learning
objectives
Plenary
Write a coded message using ASCII for the class and see who can work it out fastest.
ASCII Text Data
Numbers Symbols Capacity
Characters

10. ALL MOST SOME ASCII Text Data Numbers Symbols Capacity Characters
Describe how characters are stored in a computer system using ASCII and how this improves efficiency
Decode a message given to you in ASCII
Learning
objectives
ALL
(Level 5)
Understand how data, such as numbers, sound and images are physically stored on a computer system.
Explain how each character is stored on the computer using ASCII code.
MOST
(Level 6)
Understand how instructions are run inside a computer
Explain what the computer is actually doing when you type a word on the keyboard and it appears on screen in a word processor.
SOME
(Level 7)
Understand how instructions can be written efficiently and be able to describe the efficiency of your programs
Explain how being able to write characters rather than their binary representation helps to make using a computer more efficient
ASCII Text Data
Numbers Symbols Capacity
Characters

11. Due: Thursday 16th January
List the different units of data and their respective values
Understand how knowing the size of software you want to run can help to make it run more efficiently
Learning
objectives
Homework
The History of Computing
Research Charles Babbage and Ada Lovelace, find out:
Who they were
When they lived
What they invented and what this did
What impact this had on computing
Due: Thursday 16th January
This term your homework will be around a theme -
Data Bit Nibble
Byte
Kilobyte Megabyte
Gigabyte Terabyte