FULL Python Lesson - Functions (Subroutines) and parameters for GCSE Computer Science

In this full GCSE lesson, we break down functions and procedures into simple, clear steps so you can understand exactly how parameters, return values, and reusable blocks of code work. These skills are essential for AQA / OCR & Edexcel, and mastering them early will boost your marks, improve your logic, and make your programs cleaner and easier to understand. If you’re preparing for GCSE Computer Science or just want to level up your Python skills, this lesson gives you the confidence to use functions properly and avoid the mistakes that hold students back. Learn Python FAST tutorial. Teach Python EASILY. Want to know how to teach Python to beginners & GCSE students - here’s where you start
Stop repeating code and start writing Python like a pro!