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LESSON 1

CPU

The Brain of the Computer

The CPU is the most important component in a computer. It fetches, decodes and executes instructions to make everything work.

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Learning Objectives

  • Understand what a CPU is and what it stands for.
  • Explain the role of the CPU in a computer system.
  • Describe how the CPU works with other components.
YOUR LESSON JOURNEY

What You Will Learn

Complete each step in order. Each section builds your knowledge and understanding.

1.

Reflection

Discuss the key question with your partner.
2.

Learn

Read and explore the key information about the CPU.
3.

Watch

Watch the video to see the CPU in action.
4.

Quiz

Test your understanding with a short quiz.
5.

Computer Doctor

Diagnose and fix common CPU problems.
6.

Exit Ticket

Answer a quick question to show what you learned.
7.

Prove Your Learning

Complete the challenge to prove your knowledge.

Brain

The CPU controls and processes instructions.

Billions

Modern CPUs perform billions of calculations per second.

Fetch

Fetch, decode and execute is the basic CPU cycle.

24/7

The CPU works constantly while the computer is on.

1. Reflection Time

Question: If the CPU is called the brain of the computer, what jobs do you think it does?

  1. Think quietly for 1 minute.
  2. Discuss your idea with someone.
  3. Be ready to share the answer with your teacher.

2. Learn: What is the CPU?

Explore all four cards to discover more about the CPU. Click a card again to turn it back over.

3. Watch: CPU Explained

Watch this video to help you understand the job of the CPU before the written activity.

Watch CPU Explained for Kids

While watching, answer:

  1. What is the CPU responsible for?
  2. Why is the CPU called the brain of the computer?
  3. Which component does the CPU work closely with?

4. Checkpoint Quiz

1. What does CPU stand for?

Central Processing Unit
Computer Power Unit
Control Program Utility

2. What is the main job of the CPU?

Process instructions and calculations
Store files permanently
Display images on the screen

3. Which component does the CPU work closely with?

RAM
Printer
Speakers

5. Main Activity: Computer Doctor

"My computer freezes when I run lots of programs at the same time. Games are lagging, and everything feels slow."

Your task: Write a short answer explaining what might be causing the problem and what advice you would give.

Model Answer

The CPU could be involved because it processes instructions and calculations. If the computer is running lots of programs or games, the CPU may struggle to keep up. RAM could also be involved because it temporarily stores data for programs that are currently running. I would advise the customer to close unused programs, check how much RAM they have, or consider upgrading the CPU or RAM if the computer is old.

Self-Assessment Checklist





6. Exit Ticket

1. What is the CPU often called?

The brain of the computer
The memory cupboard
The screen controller

2. Which answer best describes the CPU?

It processes instructions
It stores all files permanently
It prints documents

3. How confident do you feel about today's lesson?

7. Prove Your Learning

Final challenge: Imagine you are teaching a Year 6 pupil about the CPU. How would you explain the following:

Your name:

Class:

Your explanation: