H04 · Two attempts can finish together

Source review complete · local suitability still needs review.

Complete source: Original fiction. A card starts at the same mark on the same mat twice. The adult uses a push called gentler once and a push called firmer once toward the goal. Both rest at a mark two equal drawn spaces away. Strength and the full paths were not measured.

Own invitation: What is the same in the record? Does that settle whether the forces were equal?

Wanted practical offer: If wanted, draw two equal wide spaces and use a large paper piece. Adult-controlled attempts may produce different actual records. Keep them as observed; do not force this fictional result.

Complete alternative and access: Tell the complete story. The child may draw two resting marks, point or use a neutral scribe. No numbers are required beyond what the child wants to communicate.

Notice and next: Equal resting positions alone do not identify equal forces. “We do not know” can be a useful finish.