GCSE Python Common Mistakes

GCSE Python debugging guide with common programming mistakes, corrected code, examiner tips and revision tasks for OCR, AQA and Edexcel.
Help students identify, understand and fix the programming mistakes that cost marks in GCSE Computer Science.

This exam-focused revision guide includes worked Python examples, incorrect and corrected code, debugging strategies, examiner insights and practical challenges designed to build confidence and improve programming accuracy.

This resource includes:

• Common Python syntax errors
• Logic and debugging mistakes
• Variables and data types
• Selection and iteration errors
• Code Detective challenges
• Bit by Bit Teaching Tips
• Examiner Insights
• Final programming checklist

Perfect for:

• OCR GCSE Computer Science (J277)
• AQA GCSE Computer Science (8525)
• Edexcel GCSE Computer Science
• Classroom teaching
• Independent revision
• Intervention sessions
• Homework
• Exam preparation

Created by Ben Jervis, an experienced Computer Science teacher with over 15 years of classroom experience.

Bit by Bit Computer Science resources are designed to break complex concepts into manageable steps, helping students build confidence, deepen understanding and achieve exam success—bit by bit.