KS3 Networks & Encryption – 6 Lessons

A complete 6-lesson KS3 Computing unit covering networks, network hardware, security threats, encryption, ciphers and decryption challenges.

This resource is a fully planned 6-week KS3 Computing scheme of work designed for Years 7–9, introducing students to computer networks, cyber security and encryption through clear explanations and engaging activities.

The unit includes:

Lesson 1: Networks – LAN, WAN and real-world network examples

Lesson 2: Network Hardware – routers, switches, servers and their roles

Lesson 3: Security Threats – malware, phishing and staying safe online

Lesson 4: Ciphers – introduction to encryption and Caesar ciphers

Lesson 5: More Ciphers – extended encryption and decryption practice

Lesson 6: Decrypting Challenges – Marvel-themed challenges to apply learning in a fun, motivating way

Each lesson is suitable for a 55–60 minute lesson and can be used as:

A half-term KS3 unit

A standalone encryption or networks topic

A foundation for GCSE Computer Science security concepts

Ideal for both specialist and non-specialist teachers, with engaging content designed to build knowledge, confidence and enjoyment.