Teacher copy: This page may include teaching prompts or answer keys. Answer keys in this public library can be viewed by anyone. Give learners a clean prompt, use checks as formative evidence, and change a case locally when prior access matters.
Complete source: Original fiction. A broad card is already sliding slowly toward a drawn star. An adult gently contacts its right edge and pushes toward a nearby drawn square. The record says its direction changes toward the square and it then comes to rest. Its full curved path, contact strength and travel distance are not recorded. No child performed the action.
Own invitation: What changed in motion? What would make an instruction about the contact clearer?
Worked possibility and a different next teaching invitation
**Source-supported possibility:** The supplied adult contact changes the motion’s direction from toward the star to toward the square, followed by rest. It does not establish an exact path or strength. A clearer instruction can keep right-edge contact and square direction together; no child-operation claim.
**Unknown/limits:** Keep every missing force, path, future attempt, actual child operation and player response within this source’s stated limits. A complete fictional record is source evidence, not performed-investigation evidence.
**Full next teaching:** Use C13’s start/action/rest record to separate motion from final stillness. Read all moments and invite one change description. Listen for earlier movement retained despite a still finish, without prompting an invented path.
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