New
New
Year 8

Computer architecture

I can describe the parts of a computer system and explain how they work together to execute programs.

New
New
Year 8

Computer architecture

I can describe the parts of a computer system and explain how they work together to execute programs.

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Lesson details

Key learning points

  1. Every computer has the same basic parts such as a processor, memory, and storage.
  2. The central processing unit (CPU) executes instructions and controls other parts of a computer system.
  3. All computers use the fetch, decode, execute cycle as the basic way they execute programs.

Keywords

  • Processor - the part of the computer that carries out instructions and makes decisions

  • Random access memory (RAM) - where the computer temporarily stores data and instructions it is using

  • Storage - where the computer keeps data and files permanently, even when it's turned off

  • Execute - to carry out a program or a set of instructions on a computer

Common misconception

The CPU is the only important part of a computer.

The CPU is an important part of a computer system but a computer also needs memory, input, output, and storage to work properly. All parts must work together as a system.


To help you plan your year 8 computing lesson on: Computer architecture, download all teaching resources for free and adapt to suit your pupils' needs...

Computer architecture can feel abstract, so use simple diagrams and real world comparisons to keep learners engaged and help them understand the topic.
Teacher tip

Equipment

Licence

This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Lesson video

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Prior knowledge starter quiz

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6 Questions

Q1.
Match each keyword to its correct description.

Correct Answer:hardware,the physical parts of a computer, like the keyboard or screen

the physical parts of a computer, like the keyboard or screen

Correct Answer:software,the apps and instructions that run on a computer

the apps and instructions that run on a computer

Correct Answer:program,a set of instructions that tells a computer what to do

a set of instructions that tells a computer what to do

Correct Answer:data,information such as numbers, text, or images that a computer uses

information such as numbers, text, or images that a computer uses

Correct Answer:operating system,the software that controls the computer and manages other programs

the software that controls the computer and manages other programs

Q2.
What word describes an electronic device that processes data?

Correct Answer: Computer

Q3.
What is a computer system made up of?

only one part
Correct answer: several parts working together
just the screen
only the keyboard

Q4.
Put these actions in order for using a general-purpose computer.

1 - Turn on the computer.
2 - Open a program.
3 - Enter data.
4 - See the result.

Q5.
What makes a general-purpose computer different from a single-purpose device?

It is always smaller.
It only does one thing.
It is only used at school.
Correct answer: It can run many different programs.

Q6.
What is the main job of a computer?

to clean your room
to cook food
Correct answer: to process data and perform tasks
to water plants

Assessment exit quiz

Download quiz pdf

6 Questions

Q1.
Which part of a computer is responsible for carrying out instructions?

Correct Answer: Central Processing Unit, CPU, Processor

Q2.
What does memory (RAM) do in a computer?

stores data permanently
displays images
Correct answer: temporarily holds data and instructions being used
makes sound

Q3.
Which part of a computer keeps data even when the computer is turned off?

RAM
CPU
Keyboard
Correct answer: Storage

Q4.
Arrange these steps for how a computer executes a program.

1 - The CPU fetches an instruction from memory.
2 - The CPU decodes the instruction.
3 - The CPU executes the instruction.
4 - The result is stored or displayed.

Q5.
Match each keyword to its description.

Correct Answer:processor,the part that carries out instructions

the part that carries out instructions

Correct Answer:memory (RAM),where data and instructions are kept temporarily

where data and instructions are kept temporarily

Correct Answer:storage,where data and files are kept permanently

where data and files are kept permanently

Correct Answer:execute,to carry out program instructions

to carry out program instructions

Correct Answer:fetch, decode, execute cycle,the steps for running instructions in a computer

the steps for running instructions in a computer

Q6.
Which statement is correct about the importance of computer parts?

Only the CPU is needed for a computer to work.
Correct answer: The CPU is important, but the computer needs memory, storage, and other parts.
The mouse and keyboard are the only important parts.
Storage is more important than the CPU.