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How the CPU Works

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This worksheet marks itself

Set it as homework or classwork and every answer is marked as pupils go, with feedback on what they got wrong. The scores go straight into your mark book, so you can see who needs help before the next lesson.

  • 11 questions
  • 30 marks
  • about 30 minutes
  • marked instantly

Question types: multiple choice, label the diagram, fill the gap, ordering, true or false.

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Try one from this worksheet

The CPU is one of the most important components inside a computer. What does CPU stand for?

Pick an answer: it's marked straight away, just as your pupils would see it.

About this resource

What the CPU does, the three parts inside it (Control Unit, ALU and Clock), a simple fetch-decode-execute cycle, and how clock speed and cores affect performance.

18 slides.

Lesson outline

  1. Hook — Count to Three
  2. Do Now — Retrieval
  3. Keywords for This Lesson
  4. The CPU — The Computer's 'Brain'
  5. Quick Check — Does the CPU Think?
  6. Inside the CPU — Three Parts
  7. What Each Part Does
  8. Task 1 (guided) — Match the Part to Its Job
  9. The Fetch-Decode-Execute Cycle
  10. Follow One Instruction — Add 2 and 3
  11. Task 2 (semi-guided) — Put the Steps in Order
  12. Clock Speed — How Fast the CPU Works
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