FREE The CPU | OCR J277 GCSE Computer Science

FREE FULL LESSON – try the Mo² format in your classroom before you buy.

The CPU: What the CPU does and the fetch–execute cycle. A complete, ready-to-teach 90-minute lesson for OCR GCSE (9–1) Computer Science J277, spec 1.1.1, Paper 1 (J277/01). Download it and teach it, no preparation needed.

WHAT’S INCLUDED
• PowerPoint (92 slides) with step-by-step animated worked examples and click-to-reveal answers
• Worksheet with three levels: Bronze (grades 2–4), Silver (4–6) and Gold (6–9)
• Exit tickets with a confidence scale
• Teacher answers with full working

LESSON FLOW
• Recall (6 questions) and starter (4 questions), timed
• Objectives, key words and a key facts slide
• Part A: What the CPU does · Part B: The fetch–execute cycle · Part C: Follow a program
• Each part: method, I do, We do, You do (6 mini-whiteboard questions; the score picks the worksheet level), timed worksheet task, answers
• 4 original exam-style questions (7 marks) with a mark-by-mark walkthrough
• Exit ticket

LEARNING OBJECTIVES
• To know: The purpose of the CPU and the three stages of the fetch–execute cycle
• To understand: What happens at each stage, and what the program counter (PC) holds
• To be able to: Follow a short program through the cycle and say what it outputs

WHY TEACHERS LIKE IT
• Visual first: every worked example builds one click at a time
• Teacher notes on every slide: timings, what to say, and the mistakes examiners report
• Every answer checked: calculations, traces and code are worked out by running them
• Exam-style questions written to match J277 command words and mark tariffs

Key words: CPU, instruction, fetch–execute, program counter.
Part of Unit 1: Systems architecture. The rest of Unit 1 (L02–L04) is available as single lessons and in the Unit 1 bundle. If you find it useful, a review helps other teachers find it.

Original resource by Mo² (Mo Squared Resources). Not endorsed by OCR.