Use a specific result to support an answer. Look for a pattern, including similarities and differences. If results vary, say so. Evidence from these paper pieces cannot tell us how every bridge behaves. Safety: Stable floor setup and light wooden pencil only. Stop if supports move. Stop: End after six light-load checks. Do not add trials simply to obtain the expected answer.

Materials: One wooden pencil, paper and ruler; Two equal sheets and two stable books 1. Ask: Which of these two paper shapes holds a pencil across a 10 cm gap? Predict, then make one flat sheet and one accordion sheet with alternating folds about two finger-widths wide. Position the folds along the span between books. 2. Place stable books 10 cm apart on the floor. Test each sheet with the same wooden pencil centred for a slow count of five. Reset and repeat each twice more. Keep overlap and pencil direction the same. 3. Record Design | Trial 1 | Trial 2 | Trial 3. Write holds or touches floor, plus any slip or tear. Do not remove a failed result because it differs from the others. 4. Underline a similarity, such as both were tested with one pencil. Circle an outcome difference or state that the designs had the same outcome. Count each design’s successful trials. 5. Write My answer is __. My evidence is __. This suggests __ for these materials. If the pattern is inconsistent, say the evidence does not give a clear winner and name a detail to check next time. Done: The learner names a similarity and an outcome pattern and supports an answer with two actual data points. Proof: Keep the full table and evidence sentence. Note assisted counting, folding and adult sentence suggestions. Stop: End after six light-load checks. Do not add trials simply to obtain the expected answer.