Code Duel

Pick a kit — then 2–4 players take turns on one device. Same questions for everyone; highest first-try score wins.

Choose a kit

Kit 1: Secret Messages Basics grades 4-5 · 25 questions Kit 2: Caesar & Substitution Ciphers grades 4-5 · 25 questions Kit 3: Frequency Analysis grades 5-6 · 25 questions Kit 4: Transposition Ciphers grades 5-6 · 25 questions Kit 5: Number-Based Codes grades 5-6 · 25 questions Kit 6: Modern Encryption Concepts grades 6-7 · 25 questions Kit 7: Steganography & Information Hiding grades 6-7 · 25 questions Kit 8: Cryptography in Daily Life grades 7-8 · 25 questions Kit 9: Classical Cipher Systems grades 4-5 · 25 questions Kit 10: Modern Cryptography Basics grades 4-5 · 25 questions Kit 11: Codebreaking Techniques grades 4-5 · 25 questions Kit 12: Cybersecurity Foundations grades 4-5 · 25 questions Kit 13: Cross-Topic Connections grades 5-6 · 25 questions Kit 14: Real-World Applications grades 6-7 · 25 questions Kit 15: Misconceptions & Reasoning grades 6-7 · 25 questions Kit 16: Advanced Synthesis grades 7-8 · 25 questions