Logic gates | OCR J277 GCSE Computer Science

Logic gates: AND, OR, NOT gates, truth tables and logic diagrams. A complete, ready-to-teach 90-minute lesson for OCR GCSE (9–1) Computer Science J277, spec 2.4.1, Paper 2 (J277/02). Download it and teach it, no preparation needed.

WHAT’S INCLUDED
• PowerPoint (93 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: AND, OR, NOT · Part B: Circuits and truth tables · Part C: Diagrams and expressions
• 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 (12 marks) with a mark-by-mark walkthrough
• Exit ticket

LEARNING OBJECTIVES
• To know: The symbols and truth tables of the AND, OR and NOT gates
• To understand: How signals pass through a logic diagram with 2 or 3 gates to give the output
• To be able to: Complete truth tables, write the expression for a diagram, and draw one from an expression

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: Logic Gate, Truth Table, Logic Diagram, Expression.
Part of Unit 10: Boolean logic. Also available in the full course bundle.

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