From Code to Your Pocket: teacher key

How Apps Work, grade 11 edition, written for 11th grade. An app is a software program made by developers, kept in its own sandbox on Android and sometimes talking to servers and advertisers. The COPPA rule protects children under 13, and a child asks a grown-up before getting an app.

Read the book. Print this page for the key.

Questions and answers

1. Why would a parent turn on Ask to Buy for a child's phone?
   • So the parent can approve or decline the request (answer)
   • So the phone gets faster
   • So the app costs nothing
2. What does each Android app live inside?
   • A hard drive
   • Its own security sandbox (answer)
   • A shared notification
3. What happens to third-party code built into an app when a person gives the app camera or location permission?
   • It receives those same permissions (answer)
   • It is deleted
   • It receives no permissions
4. Which children was the COPPA rule designed to protect?
   • Children under age 13 (answer)
   • Teenagers only
   • Adults
5. What may Apple's Kids Category apps not send to third parties?
   • Game scores
   • Personally identifiable information or device information (answer)
   • App icons
6. In the sentence "Encryption turns readable data into a form that hides its meaning," what does encryption do?
   • It hides what the data says (answer)
   • It makes the phone faster
   • It shows an ad

Words

• sandbox: app's own space
• encryption: data scrambling
• phishing: scam tries
• notification: short message