Algorithms, data structures, Boolean logic, paradigms, compilation, and software development — all ten Unit 3 topics in one gamified skill path. Earn XP, collect stars, and track your exam readiness topic by topic.
Work through each topic in order. Click any unlocked node to launch the quiz. Earn three stars to master a topic and unlock the next one.
Eight years of past papers and mark schemes, distilled into ten topic cards. Click Quick Quiz on any card to test yourself instantly.
The Unit 3 paper regularly tests truth tables, algorithm tracing, and Big O analysis. Use these tools to practise the skills directly.
Enter any Boolean expression using A, B, C, AND, OR, NOT, XOR. Build the complete truth table — just as the exam requires.
Calculate the time complexity and graph shape for nested loop algorithms. Based on past paper questions from 2019, 2022, 2023, and 2025.
Calculate compression ratio, percentage saving, and compression time. Based on 2025 Q10 (3 marks).
Key Unit 3 terms. Click the card to reveal the definition, then mark whether you know it. Cards you mark as unknown cycle back around.
Trace through Bubble Sort, Binary Search, Insertion Sort, and the 2018 Denary to Binary algorithm one step at a time. Earn 10 XP for completing each trace.
Earn XP by completing quizzes and using the interactive tools. Your score updates live as you work through the topics.