Tags: cybersecurity, cryptography, encryption, Caesar cipher, symmetric encryption, asymmetric encryption, HTTPS, TLS, computer science, STEM, high school

Description: ⚡ READY TO TEACH — no prep needed. Pick this up Sunday, teach it Monday.

Students crack a Caesar cipher live in class, compare symmetric and asymmetric encryption, and understand exactly what happens when they type a password into an HTTPS login page.

📦 WHAT'S INCLUDED (4 files)

✅ Student Worksheet + Answer Key (PDF) Encode and decode real Caesar cipher messages, complete a symmetric vs asymmetric comparison table, analyse HTTP vs HTTPS URLs, and create their own cipher. Full answer key included.

✅ 20-Point Quiz + Answer Key (PDF) 10 multiple choice + 2 short answer covering Caesar cipher, encryption types, HTTPS, and digital signatures. Model answers included.

✅ Complete Lesson Plan (PDF) Warm-up: write KHOOR ZRUOG on the board and race to crack it. Cipher decode race, encryption jigsaw, and HTTPS browser investigation.

✅ PowerPoint Slide Deck (PPTX) Live cipher decode activity, symmetric vs asymmetric comparison, HTTPS explained — with speaker notes.

📚 WHAT STUDENTS WILL LEARN

• How the Caesar cipher works and its two major weaknesses
• Symmetric vs asymmetric encryption — when to use each
• Why HTTPS protects login forms and payment pages
• How digital signatures prove identity and integrity

👩‍🏫 DETAILS

• No prior coding experience required
• Works printed OR digitally
• Grades 9–12 (adaptable for 7–8)
• 45–60 minutes
• Pack 3 of 10 — buy the full bundle and save

© Beyond CS Princess. Single classroom use only. Not for redistribution.