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# Your digital footprint

Cyber safety and privacy · Protect your accounts

<!-- Speaker note: Students sort what an app records into data given and data collected as it is used, judge each sign-up field against the app's purpose, and set an account to its most private while keeping its purpose (AC9TDI8P14 nodes 1 to 3). A 5E mission lesson. About 40 minutes (Engage and Explore 10 min · Explain 8 min · Elaborate 16 min · Evaluate 6 min). -->

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## Today

**We are learning to** your digital footprint is everything apps record about you: what you give them, and what they collect as you use them (where you are, what you open, when). A good app collects only what its purpose needs. You manage your own footprint by checking settings, which often start open.

- I can name data an app collects without my typing it.
- I can judge whether data is needed for an app's purpose.
- I can set my own privacy settings and explain the trade-off.

<!-- Speaker note: Before class: Try the board yourself. Ava and the club app are made up. The one idea: collect only what the purpose needs, and check your own settings, because they often start open. Typical width (node 1): have pairs open the privacy section of one app they use (or a printed privacy policy) and list three things it collects, at least one collected as they use it. Teacher: Evaluate: discuss which of their own settings they'd change. -->

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## Why it matters

> Ava typed three things into the club app. It knows eight things about her. Where did the other five come from?

<!-- Speaker note: **Your mission:** the club app is about to launch. Find out what it records about members, cut what it doesn't need, and help Ava set up her own account. -->

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<span style="background:#dbeafe; color:#1a1a1a; border:1.5px solid #3b82f6; padding:6px 18px; border-radius:8px; font-size:1em; font-weight:500;">💬 Discussion</span>

## Engage: predict

**Ava types her name, school email and one poll answer into the club app. What else could the app know about her?**

- Only what her teacher tells it
- Lots: where she is, what she opens, when, and what device she uses
- Nothing: only what she typed
- Only her password

<!-- Speaker note: What happens: Lots. As she uses the app it can record where her phone is, which pages she opens and for how long, when she signs in, and her device. Take two or three predictions before anyone runs it. -->

<!-- Speaker note: Teacher: ask what an app might know that you never told it. -->

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<span style="background:#fef3c7; color:#1a1a1a; border:1.5px solid #f59e0b; padding:6px 18px; border-radius:8px; font-size:1em; font-weight:500;">✍️ Activity</span>

## Try it

{{embed: https://studio.learningwaypoints.com/tutorials/_playground-board/index.html?id=deck%2Fsystems%2Fcyber%2Ffootprint%2Fstep-2&code=widget%3A+cyber%0Amode%3A+footprint%0Aset%3A+collects%0A&fresh=1}}

[Open this step in the tutorial](https://studio.learningwaypoints.com/tutorials/systems/cyber/footprint/?full=step-2#step-2)

<!-- Speaker note: Was your prediction right? -->

<!-- Speaker note: Teacher: ask which collected-as-used items surprised them. -->

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<span style="background:#dcfce7; color:#1a1a1a; border:1.5px solid #22c55e; padding:6px 18px; border-radius:8px; font-size:1em; font-weight:500;">✅ Check</span>

## What happened?

* Lots. As she uses the app it can record where her phone is, which pages she opens and for how long, when she signs in, and her device.

<!-- Speaker note: Reveal after running. Ask who predicted it, and what made them think so. -->

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<span style="background:#dcfce7; color:#1a1a1a; border:1.5px solid #22c55e; padding:6px 18px; border-radius:8px; font-size:1em; font-weight:500;">✅ Check</span>

## Explain: does it need it?

**Sam builds the sign-up form. Click the line where it first goes wrong.**

```
 1  The club app sends members news about meetings.
 2  Sam builds its sign-up form: name, year level, school email.
 3  Sam adds date of birth and home address too, in case they are useful later.
 4  Sam stores everything the form collects.
```

* Answer: line 3

<!-- Speaker note: Line 3: news about meetings needs no birth date or home address. Data kept in case can still leak, and adds to every member's footprint. What this step is for: The teacher models judging one field against the app's purpose. Sam collects in case, the misconception planted after the method. -->

<!-- Speaker note: Teacher: model the purpose test on one field aloud. -->

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<span style="background:#fef3c7; color:#1a1a1a; border:1.5px solid #f59e0b; padding:6px 18px; border-radius:8px; font-size:1em; font-weight:500;">✍️ Activity</span>

## Elaborate: the sign-up form

{{embed: https://studio.learningwaypoints.com/tutorials/_playground-board/index.html?id=deck%2Fsystems%2Fcyber%2Ffootprint%2Fstep-4&code=widget%3A+cyber%0Amode%3A+footprint%0Aset%3A+club%0A&fresh=1}}

[Open this step in the tutorial](https://studio.learningwaypoints.com/tutorials/systems/cyber/footprint/?full=step-4#step-4)

<!-- Speaker note: What this step is for: One change at a time: the same form for two purposes, so the same field can be needed for one and not the other. -->

<!-- Speaker note: Teacher: ask why the phone number changed from Not needed to Needed. -->

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<span style="background:#fef3c7; color:#1a1a1a; border:1.5px solid #f59e0b; padding:6px 18px; border-radius:8px; font-size:1em; font-weight:500;">✍️ Activity</span>

## Make: Elaborate: Ava's settings



[Open this step](https://studio.learningwaypoints.com/tutorials/systems/cyber/footprint/?full=step-5#step-5)

<!-- Speaker note: What this step is for: Managing one's own footprint: students set an account to its most private while keeping what the app is for, and read each setting's trade-off. Hints, in order: Read what each setting does before you change it. / Meeting reminders are why Ava joined: keep those. For students who need more support: The purpose test on a card: what is the app for? Would it still work without this? For early finishers: Compare what two apps you use collect (their privacy pages) and decide which collects more than its purpose needs. The hard part, on purpose: Students mark everything Not needed. Ask what would stop working: an app needs some data to do its job. When students get stuck: A student keeps extra data just in case (Sam's mistake). Ask: Would the app still do its job without it? Fix: If yes, don't collect it. / A student turns meeting reminders off too. Ask: Why did Ava join the app? Fix: Keep what the purpose needs; turn off the rest. -->

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<span style="background:#dcfce7; color:#1a1a1a; border:1.5px solid #22c55e; padding:6px 18px; border-radius:8px; font-size:1em; font-weight:500;">✅ Check</span>

## Exit ticket

**Name one piece of data an app collects without you typing it, and one sign-up field a club newsletter doesn't need.**

* Location, pages opened, sign-in times or device. A home address or date of birth.

<!-- Speaker note: Students answer on paper or a mini whiteboard before the reveal. Anyone who cannot answer needs the main idea again next lesson. Where this leads: Next (Years 9–10): Threat models. -->