For visitors who'd rather read than walk.
# From farm to tray — Period-3 Agriculture, fall semester
You're Mr. Diaz, high-school agriculture teacher. Period-3 in the
fall. The tomato project — seed to tray, lunch tray — runs all
semester.
The hook on Merkle Trust's landing: the kids do real work; the work
has nowhere to live; the chain is where the work can live, and the
kids can run the chain themselves once you show them how, once.
Four real paths exist. For a school agriculture program, the order
is GitHub-first or operator-managed depending on the district's IT
posture, with FERPA/COPPA scoped carefully.
Clone GarrisonNode from GitHub. Self-install on a school
machine if the IT department permits. Open source.
Join the mesh. GitHub install plus mesh anchoring with peer
schools and the FFA chapter. The deepest path; appropriate for
districts with multi-school program coordination.
Subscribe to a regional operator. Operator-managed under
FERPA-aware data-handling rules. The path most teachers take when
the district's IT timeline is slower than a semester.
Paste the markdown into your LLM. Lightest path; useful for
evaluation against state vocational-education association
guidance.
A sandboxed Merkle Trust loads the synthetic class project: a
heirloom tomato variety from a regional seed library, a class of
twenty-eight students, four months of records.
The walk takes the walk-a-tomato-from-seed-to-tray sidebar — the
full chain across the semester for one tomato.
Seed-stock attestation: heirloom variety, regional seed library,
date received, signed by Mr. Diaz.
Sowing day: each student plants a tray, signs the planting,
photographs the labeled tray.
Daily care log: temperature, watering, pest checks, growth
notes — signed by the student on care duty that day.
Transplant attestation: greenhouse to plot, student signs the
row transition.
Pest event (week five, leaf miners). Outbreak; student team
handled it; photos and response sealed.
Harvest attestation: weighed, signed by the student team.
Cafeteria handoff: signed by both the student team and the
cafeteria manager.
Lunch tray attestation: menu item linked back to the harvest
record.
The kiosk in the cafeteria displays the chain when students scan
the menu — and one entry on the chain reads: "external supplier,
not attested by us yet." Honest handoffs make for honest provenance.
Every student contribution is signed by the student responsible.
The chain knows who watered on which day. The chain knows who
pulled the leaf-miner-affected leaves. The chain knows who was on
the harvest team.
The cafeteria handoff is dual-signed. Student team and cafeteria
manager both sign. The chain links the produce to the menu without
requiring the cafeteria to use the school's software stack.
FERPA, COPPA, state student-privacy laws are honored by the
substrate's privacy-tier defaults. Student names are sealed inside
the chain; public-facing displays show pseudonymous role
identifiers ("care duty, day 47") unless the student and their
guardian explicitly opt in to public attribution.
The .md button puts the classroom-pattern summary into your
tag-along bundle. Comment field routes an FFA-style question to
your own claude.ai session.
Run a ceremony. Fifteen seconds.
Progress bar reads "done — 1,847 student contributions, 84
cafeteria handoffs, 1 semester of program records, all anchored.
New school anchor at " followed by the first eight hex characters
of the root.
Sealed: "Every student contribution and every program handoff is
sealed. Nothing has been altered since the date of seal. The
portfolios are current."
The most useful close for an FFA-affiliated program is to take the
state FFA partner kit. The state convention is in March, and the
kit is the conversation-starter. Local install bookmarked for the
following Saturday.
The package, the cert, the recovery seed — all ride along, with
appropriate FERPA-scoped framing about student data.
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That was the simulated path through Period-3 Agriculture and one
tomato's full chain to the tray. The full card breaks out the
honest-handoffs pattern, the kiosk display, and a
school-portfolio-portability prediction that's yours to test.