Classroom mode
A question for the whole room
One story to open. A room full of ideas to test.
Ready in three steps
- Open the story.Read and try the first pages together.
- Pause for a prediction.At the story’s question, read its choices aloud. Invite a vote and ask, “What makes you think that?”
- Run it. Watch. Wonder.Choose the class’s prediction, run the experiment, and compare what happened with your guesses.
Different guesses are welcome. The experiment gives everyone something to rethink.
Something to put on paper
A one-page prediction and observation sheet. No answers included.
After the experiment: discussion notes
Talk about what happened
- Why must a six-tooth output turn three times for an eighteen-tooth driver?
- Why can a longer handle help while a wider rope drum makes a load harder to turn?
- Which real losses make actual gear trains differ from this ideal model?
Where it shows up in real life
- A bicycle shifting between different sprocket sizes
- Clock hands driven at different turning rates by a gear train
- A hand drill or egg beater whose crank turns a smaller gear
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