OCR J277 2.1 Computational Thinking Lesson

OCR J277 GCSE Computer Science 2.1.1 lesson: abstraction, decomposition and algorithmic thinking. 30 slides, practice, exam questions, quiz and answers.

A complete, ready-to-teach lesson for OCR GCSE Computer Science (J277) 2.1.1 Computational thinking, covering all three principles in the specification.

What’s included (30 editable slides)

• Learning objectives and a “jam sandwich” Do Now with an example answer
• Overview of computational thinking
• Algorithmic thinking: identifying the steps, putting them in order, and spotting decisions and repetition
• True or False check with answers
• Decomposition: tree diagrams showing sub-problems broken down further
• “Decompose It” guided task with answers
• Abstraction: a train map example showing what is removed and what is kept
• “Keep or Remove?” abstraction task with answers
• Six differentiated challenges (green, amber, red) with full answers
• Exam-style questions with a mark scheme
• Interactive quiz: students click an answer and see straight away if they’re right

Teacher notes on every slide, including misconceptions, teaching suggestions and ways to check understanding.

Uses no programming language, so it can be taught before students learn to code. This is lesson 1 of 6 in the OCR J277 2.1 Algorithms unit, also available as a complete bundle with booklets, homework and assessments.