How to Use This Course
Every chapter follows the same structure — phenomenon, variables, experiment, observation, model, transfer.
Chapter structure
| # | Step | What it does |
|---|---|---|
| 1 | Phenomenon | Something happens: the coffee tastes sour. |
| 2 | Variables | What might control it? |
| 3 | Experiment | Change one variable. |
| 4 | Observation | What happened? |
| 5 | Model | Why? |
| 6 | Transfer | Apply the model to a real cup. |
| + | Misconceptions | |
| + | Real Lab | |
| + | Check Your Model | |
The first six steps are a small loop of scientific method: notice something, find the variables that might control it, change one at a time, observe, build an explanation, and apply it to a real cup.
Predict before you look
Café OS rarely uses multiple choice. More often: before a simulation runs, write down what you expect; afterwards, say what changed; then answer "if the cup turned bitter and drying, what would you change next?" That tests the model, not memory.
3D cannot teach taste
This limit is stated up front. Every scene ends by sending you back to the kitchen:
- Explore
- Predict
- Brew Real Coffee
- Taste
- Record
- Return to Model
- Compare
The physical cup remains essential.
What "mastery" means
Each concept tracks five levels. "Explained" is much stronger than "lesson completed":
- Seen：Read or watched the concept.
- Explored：Changed its variables in a scene.
- Predicted：Wrote a prediction before seeing the result.
- Applied：Used it on a real cup.
- Explained：Explained in their own words why a result happened.