Job: respond to a different unperformed comparison proposal. Ready: only fresh D brief/fresh-d aid; key/model data held back. Say: “What could you change in this plan?”
- 0–3: Read/describe both exact source configurations and the proposed claim. It is a new model proposal, not an earlier learner trial. No prior result or local permission exists in the brief; geometry does not command a real setup.
- 3–12: Invite one own revision/question/reason. Capture the first response and help before giving examples or inviting the next component. Do not require a particular position, numerical ideal calculation, complete fair-test checklist or exact wording.
- 12–20: After capture, invite a prediction/evidence need, another component or later short sitting. If wanted, plan a locally reviewed actual comparison; actual conduct/observation remains separately dated and attributed. The key's multiple valid examples support teaching after first capture.
- 20–25: Unfinished = not yet observed; offer another short sitting, no completion-speed score. Identify available reasoning and one appropriate next invitation, with actual trial/equipment and missing parts still open. Ten authored starts do not certify the Science year.