Paper bridge investigation
KS2 · 35 minutes · Compare two paper structures using a fair test.
Answer by: Type. You can change method or take a break at any time.
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Our learning goal
Compare two paper structures using a fair test.
Your turn: Choose one thing you would like to understand by the end.
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My lesson notes & project
Full teaching script
- Today: Paper bridge investigation. Our goal: Compare two paper structures using a fair test.
- Take one idea at a time. Pause after each sentence; ask for repetition whenever you need it.
- A structure is a shape that supports a load. Place two books a short distance apart on a stable table. Lay a flat sheet across the gap. A folded sheet can distribute a load differently. Predict which will hold more counters, but do not treat the prediction as a result. Keep the gap, paper, counter size and placement the same. Change only the fold. Add counters gently, one at a time, in the middle. Stop at ten or when the bridge bends; do not use heavy objects. Record what actually happens. Repeat with fresh sheets if possible. Worked example: flat paper holds three counters and folded paper holds seven in one trial. That trial suggests the folded structure supported more, not that every folded bridge is always stronger. Explain limitations such as uneven folds or different counter positions.
- Together: choose one example from the explanation and show how it works. What do you notice?
- Your turn: Draw your two designs and prediction. Test safely with an adult. Make a table with design, trial and counters supported. Compare observations, identify one limitation and propose one further test.
- Reflect: what made sense, and what would you like explained differently?
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