Week 10 · Term Two opening · One inspectable transit model
Turn a mountain crossing into numbers a village can check: travel time, shared load, tower budget, a fare with a named reserve, and a public boarding brief that does not claim the railway already runs.
Monday converts distance and speed into a storm window. Tuesday shares a cabin load without inventing supports the tower cannot hold. Wednesday spends just enough stone to pass sway. Thursday posts cost and reserve as two numbers. Friday writes a brief a skeptical family can inspect.
20 minutes
Algebra · Distance, rate, and a hard window
Convert distance and speed into travel time, then test each result against a named constraint instead of choosing by appearance.
Make
A storm-window time card
Skyrail handoff: The survey files Ridge Line for the storm window. Cable load is still unread — a fast line is not yet a safe hitch.
25 minutes
Forces · Shared load and a working limit
Divide a load among supports, compare each share to a working limit, and reject a design that the hardware cannot hold even if the arithmetic looks lighter.
Make
A cable-load ledger
Skyrail handoff: The four-cable hitch is filed. Tower spacing is still open — a safe cabin is not yet a fundable span.
25 minutes
Engineering · Budget, sway, and one brace
Hold two constraints at once — material budget and a measured sway limit — and accept a design that spends just enough to pass both.
Make
A tower-span board
Skyrail handoff: The measured span and brace are filed. Fare is still open — a buildable line is not yet a fare families can verify.
20 minutes
Algebra · Unit cost and a visible reserve
Divide a total cost by a count, then add a named reserve instead of treating a popular price as automatically fair.
Make
A fare ledger
Skyrail handoff: The 38-coin fare is filed with a visible reserve. Who boards first is still open — a priced cabin is not yet a public rule.
25 minutes
Public writing · A brief families can inspect
Write a public recommendation that uses the week's constraints and does not claim more than the model proved.
Make
A Skyrail design brief
Skyrail handoff: The Skyrail design brief is filed. Term Two now has one inspectable transit model — not a claim that the mountain line already runs.
The brief uses only work entered here. It does not infer a built railway, a safety certificate, grades, mastery, attendance, or accreditation.
