Invitation: “Explore a new multi-path change with an open answer.” Prepare: STUDENT-CHECKS FW-D and fresh-d aid; held until now. Selected opportunities: U02 / I04; I01 / I06 / I07 / I08 if actually evidenced; conditional on actual component evidence, not blanket code completion.
Choose one first component · 5 minutes
Open unfilled FW-D without ordinary answers beside it. Read exact labels, links and change condition neutrally. Learner chooses a diagram/path, prediction or question first; one component now and another sitting later is valid. Privately note prior access/help.
Read the new source · 8 minutes
Explain that B decreasing is a hypothetical input, not a reported learner trial or later outcome. No population quantities are supplied. Read M→A, N→A, M→B, A→B, B→H in the given food-to-consumer convention. The labels are roles in an invented model, not verified diets of real species.
Keep the first response · 12 minutes
Learner makes/describes the selected arrows or other chosen component. Ask only for the arrow key if not supplied. They may work in a different layout; geometry is not a single prescribed answer. Record the first response before access to the separate key, then pause at the split.
Reason about change · 15 minutes
Invite a possible effect on one selected population with a path/mechanism and condition. Offer the source reread, not a fixed sign. An alternative or unknown is welcome. Learner may notice competing pathways without having to solve every node. A reasoned uncertain direction can be stronger than an unjustified certain result.
Optional revision · 6 minutes
Read back the learner's own words. They may retain, revise, choose pass or return later. Mark post-teaching revisions separately. Actual model construction/direction is recorded accurately; no ecosystem observation, numerical forecast or audience feedback is invented.
Choose a next invitation · 4 minutes
After the first response, use the descriptive teacher key and rubric to suggest a path, condition or communication next move. No timed success label, A–E grade, full-standard certification or required complete form.
Practical check: Sample one actual source-connected choice/reason in the chosen mode. Use Day 30 routes, two worked contexts and home/extra invitation only as useful.