My C case idea
Use the separate source. Keep your first thinking before help; showing a model or directing marks is enough.
1. Whether the starting parts fit the whole
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2. My move in the requested direction
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3. Both of my new parts
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4. What happened to the whole, and why
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Empty four-space aid · Full empty-space description.
Grown-up help
Do not prefill these spaces or substitute the separate key for a learner response. Recording may be spoken/signed/AAC/directed/scribed. Preserve what the learner actually chose, any hints and quantity changes. Selection/preparation.
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