Goal: directly observe which of two simultaneous paper actions lasts longer, using stop/continue evidence. Proposed code: AC9MFM01. Prepare: Card 116, two large labelled lanes and Set E from Materials.
- Notice · 3 min. Ask what it would mean for two actions to start together; give one shared accessible START cue.
- Model · 4 min. Start A and B markers together. Stop A while B continues, then stop B. Say “B lasted longer because it was still going after A stopped.”
- Guide · 5 min. Repeat with new markers. Child points, feels or reports the moment one stops and the other continues; adult labels the two events without colour dependence.
- Independent try · 7 min. Run a new start-together pair and ask child to name first stop, continuing action and longer duration, with an observed reason. Record first response.
- Check · 4 min. Move one marker farther than the other while keeping original stop order. Ask whether distance proves duration; return to the stop/continue evidence.
- Exit · 2 min. Child completes “Both started together. ___ kept going, so ___ lasted longer.” If reversed, use STOP cards tomorrow.