OCR GCSE Computer Science Hexadecimal (2026) | Editable Lesson + AI Feedback

Updated for 2026 OCR GCSE Computer Science (J277) and fully compatible with AQA and Edexcel GCSE Computer Science.

This complete, fully editable lesson introduces hexadecimal representation and its role in computing systems. Students build from prior binary knowledge to confidently convert between binary, decimal, and hexadecimal — before applying their skills to decode a hidden hexadecimal message.

Perfect for OCR J277 Unit 1.2 – Data Representation and the Memory & Storage topic.

Includes FREE AI Long-Answer Feedback — students can submit extended explanations online and receive instant WWW / EBI feedback to improve:

• Clarity of reasoning
• Accuracy of conversions
• Use of correct technical terminology
• Structure in exam-style responses

Lesson Objectives

By the end of the lesson, students will be able to:

• Convert between binary, decimal, and hexadecimal
• Explain why hexadecimal is used in computing systems
• Recognise key number ranges (binary 0–255, hex 00–FF)
• Convert between 8-bit binary and 2-digit hexadecimal
• Decode a message written in hexadecimal bytes

What’s Included

• Fully editable Word lesson file with structured tasks
• Clear step-by-step conversion guidance
• Binary–Hex–Decimal practice worksheets
• Starter quiz using the Hexadecimal Bee Game (link included)
• Conversion tables and worked examples
• Challenge task: decode a real hexadecimal message
• Built-in checkpoints (“Is it ok to move on?”)
• Optional FREE AI long-answer marking integration

Topics Covered

• Base 16 number system
• Relationship between binary and hexadecimal (4-bit groups)
• Decimal to hexadecimal conversion
• Hexadecimal byte ranges (00–FF)
• Why hex is used (compact representation, readability, debugging, colour codes)
• Pattern recognition across number bases

Why Teachers Love It

• Reinforces binary before extending to hexadecimal
• Clear, scaffolded structure for mixed-ability KS4 classes
• Encourages logical thinking and pattern spotting
• Exam-focused with structured reasoning practice
• Fully editable and ready to slot into any J277 scheme of work
• Fun, engaging secret-message challenge to build confidence

Perfect For

• OCR GCSE Computer Science (J277)
• AQA & Edexcel GCSE Computer Science
• Data Representation / Memory & Storage
• KS4 Computing lessons or revision
• Retrieval and homework tasks

Format

Editable .docx lesson pack
Optional online starter activity
Fully editable & print-friendly

Suggested TES Tags

OCR GCSE Computer Science, J277, Data Representation, Hexadecimal, Binary, Decimal, Base 16, Number Systems, Memory and Storage, Secret Code, KS4 Computing, Computer Science Lesson, OCR Unit 1.2