Year 7 Science · Term 1 · Weeks 5–6 · Days 21–30 · ten optional 50-minute starts, each usable as two 25-minute sittings.
Make a useful food-web explainer from the first lesson: a paper network, spoken/described network, or learner-directed model. Choose a path, ask what might change, and show why a prediction needs conditions. One sound link or explanation component is a useful start; return later if wanted.
Start with little preparation
Read MATERIALS and the short source capsules. Use two existing broad sheets and any approved marker, or read the named nodes aloud. No device, print, live organism, field trip, cutting or purchase is needed. A teacher reads source capsules if full linked sources are unavailable. They are original factual paraphrases, not copies of expert images or tables. Keep fresh checks and the separate teacher key out of ordinary modelling until Days 25/30. No ordinary task uses either held graph.
Ten plans · 30 switchable routes · learner page · 20 worked contexts · home and extras · eight printable pairs and exact alternatives · source and rights · exact crosswalk · desk/render/verification record.
The Museum source download is currently unavailable. The dated access note in SOURCE-CAPSULES explains what was checked. Everything needed for the ten starts is supplied here; no external download is required.
Prepared opportunity and actual evidence
The ordinary web combines documented feeding possibilities into an original illustrative model. It is not a surveyed ecosystem, verified local co-occurrence, population census or prediction of an actual site. A learner can actually read, construct, compare, explain or revise this model. Moving a node does not conduct an ecosystem experiment. Record learner reasoning and support concisely; adult enactment, an unmade plan, observed model work, actual field observation and audience feedback remain different.
This leaf extends the earlier invented classification keys and brief food-web practice with resource-specific feeding links, matter/energy distinctions, alternate paths and conditional change predictions. It does not change the integrated year map or certify Year 7, every inquiry skill, all states or a full achievement standard. Untagged PDFs have exact linear/no-print alternatives; individual access, local materials and classroom pacing need human review.
Reproduce and check
From this folder: PYTHONDONTWRITEBYTECODE=1 python3 verify_pack.py. The default checks source/lesson/graph/rights/print/link/hash scope, makes 17 genuinely regenerated outputs in a temporary directory and tests meaningful faults in temporary copies. It does not write the authored pack. To intentionally refresh the inventory after an authorised edit: python3 verify_pack.py --write-manifest. To make print files in a separate empty directory: python3 make_printables.py --output /tmp/food-web-print-review. Commands do not rely on a private workstation path; use an available temporary directory. Python, Pillow, pypdf and installed rsvg-convert are required; no new dependency installation is part of this pack.