Summary
Two teams race to build a working smartphone app, planning the screens first and then debugging the logic until the thing actually does what a user expects.
Viewer safety
Ages 7+
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Teaching resources
Discussion questions
Discussion
Full episode (28 min) from SciGirls, season 2.
- What did the teams plan before they wrote any code?
- How did they find the bug when the app misbehaved?
- What app would you build for your school?
Quick work-a-long
Vocabulary: app, code, debug, user.
Try it: Sketch three screens for an app that solves a problem at your school. Write what happens when a user taps each button.

