Lesson Plan

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Lesson Plan
Grade: Date: 25/02/2026
Subject: Information Communication Technology ICT
Lesson Topic: Know and understand secure socket layer (SSL) including encrypted links between the server and the client computer
Learning Objective/s:
  • Describe the purpose of SSL/TLS and the concept of encrypted links between client and server.
  • Explain the SSL handshake process, including the roles of public‑key and symmetric cryptography.
  • Identify the components of a digital certificate and how it establishes authentication.
  • Analyse common SSL vulnerabilities and recommend best‑practice measures.
  • Apply knowledge by interpreting a simple SSL handshake diagram.
Materials Needed:
  • Projector or interactive whiteboard
  • Computers with internet access for each student
  • Sample SSL handshake diagram handout
  • Short video demonstration of an HTTPS connection
  • Worksheet with scenario questions
  • Web browser with HTTPS sites for live demo
 Introduction:
Begin with a quick poll: who has noticed the padlock icon when shopping online? Explain that this tiny symbol represents a secure link protecting their data. Remind students they already know basic encryption, and today they will see how browsers and servers create that secure connection. Success will be measured by their ability to explain each step of the SSL handshake and spot weak configurations.
Lesson Structure:
  1. Do‑now (5') – Students list examples of trusted websites and note any security indicators; teacher checks understanding.
  2. Mini‑lecture (10') – Overview of SSL purpose, encryption types, and digital certificates using slides.
  3. Handshake walkthrough (15') – Project SSL handshake diagram; students annotate each step on the handout while the teacher explains the sequence from ClientHello to Finished messages.
  4. Guided practice (10') – In pairs, learners use a browser’s security info to identify protocol version, cipher suite, and certificate details for a chosen HTTPS site.
  5. Vulnerabilities discussion (10') – Whole‑class brainstorm of outdated protocols and weak ciphers; link to real‑world attacks such as POODLE.
  6. Consolidation quiz (5') – Quick Kahoot/exit ticket with three scenario questions to check comprehension.
Conclusion:
Summarise that SSL/TLS creates an encrypted tunnel using a handshake that swaps a public‑key encrypted secret for fast symmetric encryption. Ask students to write one key takeaway on a sticky note as an exit ticket. For homework, they will research the current TLS version supported by their school’s website and note any recommendations.