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Year 1 / Science / Term 2 / Weeks 11 12 / Teacher / Examples

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C14 · A different history, an open cause

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Teacher copy · prompts and answer keys

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. Two broad paper tabs have the same outline. TabOne has an earlier fold; TabTwo was uncreased. The same adult describes each short action as a similar gentle press on the same flat mat. TabOne rests bent and TabTwo rests flatter. Exact force/contact duration are not measured and there is one try per tab. Their prior histories differ; no next attempt is supplied.

Own invitation: What differs in the records and what prevents a universal history-only explanation?

Worked possibility and a different next teaching invitation

**Source-supported possibility:** The resting shapes and prior fold histories differ. Intended similar actions and outline/mat matches are useful, but exact contact/strength were not measured and there is only one try each. A question about prior history can guide more careful matching; it does not prove history alone caused every outcome. **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 C15’s deliberately changed material question. Ask what was intended to change, which matches help and which unmeasured detail remains. Listen for a bounded relation instead of “different means unfair” or a universal material rule.

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