Practice labs
Try the ideas with your own hands
Each lab runs entirely in your browser on fictional data. They are deterministic simulations — not AI models — so results are honest practice feedback, not proof of competence. Work here isn't saved; open the lab inside its course chapter to save it to your account.
Start here · about 8 minutes · deterministic simulation, not AI
Prompt workbench
A useful prompt names the task, supplies relevant context, sets boundaries, and makes success checkable. A good-looking prompt still needs a checked answer.
A fictional community group needs a two-hour, rain-friendly activity plan for eight adults. Budget: S$80 in total. No participant details are needed.
Why this is feedback, not a quality score
The checklist only checks whether you supplied four ingredients. It cannot judge factual accuracy, privacy, or how a real model will respond. Test the answer against your actual requirements.
A polished answer can still be wrong
“Book eight tickets at S$15 each; this fits the S$80 budget.” The arithmetic is wrong: 8 × 15 = S$120. Ask for the calculation and check it yourself. A request for evidence does not guarantee evidence exists.