Goal: navigate C's paper screen conventions and compare them with a fixed sign without needing a device. Proposed codes: AC9EFLA04, AC9EFLY02, AC9EFLY05. Prepare: C on two large paper sheets, Next/Back cards, Card 154.
- Oral/print · 3 min. Adult says first / next / back; child directs three broad cards into an order. Child print remains a separate taught-point choice.
- View/listen · 4 min. Read C Frame 1. A child picks or directs one labelled choice. Adult reveals Frame 2; no click, account or personal information is used.
- Model · 5 min. Point to frame title, labelled options, Next and Back. Show that both options in this mockup lead to the same general return/tell frame; do not claim the paper screen responds differently or records a selection.
- Child try · 7 min. Child chooses a library, maker or paper transit route and directs an adult through choice → Next → Back, explaining one way this structure differs from B's single fixed sign.
- Check · 4 min. Hide the Back label, then ask what a user would need to go to Frame 1. Ask whether C requires a photo; text says no. A plain spoken transcript is equally valid.
- Exit · 2 min. Child names one screen feature that helps and one thing the screen cannot know from paper alone.