For the student who understands the problem and still cannot write it
The gap between knowing what to do and being able to type it is where most students stall. This teaches the reasoning first, then removes the scaffolding a piece at a time.
- Two phases: work out the logic, then write the code for the logic you worked out
- Scaffolding fades across a track, so the support disappears before the exam does
- Edge cases are derived from the function signature, and answers by real execution
- A recorded step-through shows exactly which line broke the reasoning
The detail that makes it checkable
The difficulty ramp is enforced when the track is built, not left to chance.
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