Computing · Year 6

Active learning ideas

Introduction to Network Security

Active learning turns abstract security ideas into tangible skills students can practise and defend. When Year 6 learners create, test, and debate passwords and Wi-Fi habits, they move from hearing rules to owning them.

• National Curriculum Attainment Targets
• KS2: Computing - Computer Systems and Networks
• KS2: Computing - Online Safety

• 25–45 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Case Study Analysis
• 30 min · Pairs

Pair Challenge: Password Cracker Test

Pairs create three passwords: weak, medium, strong. Use a free online password strength tool to check crack times and record results. Discuss patterns in a class share-out, noting why complexity resists attacks.

Explain why strong passwords are essential for online safety.

Facilitation Tip

During the Password Cracker Test, circulate with the timer visible so students feel the pressure of brute-force attacks in real time.

What to look for

On a slip of paper, ask students to write: 1. One reason why a password like '123456' is weak. 2. One type of personal information they should never share on public Wi-Fi. 3. One rule for using public Wi-Fi safely.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

Activity 02

• Case Study Analysis
• 45 min · Small Groups

Small Group: Wi-Fi Risk Scenarios

Provide printed scenarios of public Wi-Fi use, like banking or chatting. Groups identify risks, propose safe alternatives, and draft two rules each. Present to class for a combined rule set.

Assess the risks of sharing personal information on unsecured networks.

Facilitation Tip

For Wi-Fi Risk Scenarios, assign roles that force students to speak from the hacker’s and the user’s perspectives to deepen empathy.

What to look for

Present students with three password examples: 'password', 'P@$$wOrd123', and 'MyDogSpot'. Ask them to hold up one finger for weak, two for moderate, and three for strong. Follow up by asking volunteers to explain their choices.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

Activity 03

• Case Study Analysis
• 40 min · Whole Class

Whole Class: Safe Behaviour Rule Vote

Brainstorm 10 online safety rules on the board. Class votes on top five using sticky notes, then illustrates them on a shared poster. Review how rules address passwords and networks.

Design a set of rules for safe online behavior when using public Wi-Fi.

Facilitation Tip

After the Safe Behaviour Rule Vote, post the winning rules on the wall so students can reference them during the Personal Safety Audit.

What to look for

Pose the question: 'Imagine you are at a library using their free Wi-Fi to look up homework. What are two things you should avoid doing, and why?' Facilitate a brief class discussion, guiding students to mention avoiding sensitive sites and logging out of accounts.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

Activity 04

• Case Study Analysis
• 25 min · Individual

Individual: Personal Safety Audit

Students list their online habits, flag risks like weak passwords, and rewrite one rule for public Wi-Fi. Share one change with a partner for feedback before class discussion.

Explain why strong passwords are essential for online safety.

Facilitation Tip

When students share audit results, ask them to point to the data on the wall to practise evidence-based reasoning.

What to look for

On a slip of paper, ask students to write: 1. One reason why a password like '123456' is weak. 2. One type of personal information they should never share on public Wi-Fi. 3. One rule for using public Wi-Fi safely.

• Analyze
• Evaluate
• Create
• Decision-Making
• Self-Management

A few notes on teaching this unit

Teachers should model vulnerability by sharing their own password mistakes and how they changed habits. Avoid long lectures; instead, let evidence from the cracker tool or scenario debates drive understanding. Research shows that peer explanation and immediate feedback close misconceptions faster than teacher correction alone.

By the end of the session, every student can explain why a strong password resists attacks and list two safe behaviours on public Wi-Fi. You’ll see confident discussion, revised passwords, and clear personal commitments on exit slips.

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Watch Out for These Misconceptions

• During the Password Cracker Test, watch for students who say a long word like 'password123' is strong.

  Pause the timer after the run and ask pairs to count character types; when they see only lowercase and numbers, guide them to revise the password by adding symbols and uppercase letters.

• During the Wi-Fi Risk Scenarios, watch for students who believe public Wi-Fi is safe because it is free.

  Hand each group a 'data interception' card that shows a pop-up message reading, 'Hacker captured your login'; students must explain how the interception happened and revise their scenario scripts.

• During the Personal Safety Audit, watch for students who think passwords only need changing if forgotten.

  Ask students to circle the date on a calendar and model how hackers can reuse old passwords; then have them draft a schedule for quarterly updates in their audit notes.

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Methods used in this brief

• Case Study Analysis