The most thorough recursion revision resource for Cambridge A Level Computer Science 9618. Recursion questions regularly appear in Paper 2 and require students to both write recursive functions and trace them — skills that demand careful practice, all covered here.

What’s included:
• Learning Objectives aligned to 9618 syllabus
• Syllabus Mapping (Paper 2, Sections 2.3 & 2.4)
• Knowledge Organiser — base case, recursive case, call stack, stack overflow explained
• Complete Revision Notes — definition, call stack mechanics, factorial worked through step by step, recursion vs iteration comparison table
• Worked Examples — recursive factorial FUNCTION in full Cambridge pseudocode
• Common Mistakes — missing base case, wrong trace order, LIFO/FIFO confusion
• Examiner Tips — how to trace recursive calls (down then back up)
• Exam Technique — always identify base case before writing recursive case
• Exam-Style Questions (Fibonacci trace, sum function)
• Topic 91¶¶Òõt
• Mini Mock Exam
• Full Mock Exam
• Detailed Mark Scheme
• Model Answers
• Revision Checklist
• Progress Tracker
• Glossary

Essential for Cambridge 9618 Paper 2 and all courses covering recursion.

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