L102 · Allow 10–15 minutes for learners ready to move on. Answers are available after an attempt.
A solid enlarges by length factor 2.5. Find surface area and volume factors.
2.5²=6.25; 2.5³=15.625.
A learner uses the area factor for volume. Explain why this fails with dimensions.
Area has two length dimensions (k²); volume has three (k³).
Lesson L102: Paper 3 feedback and repair
Objective: Interpret feedback on mock Paper 3 and repair a priority misconception.
60-minute structure: 0-7 Connect & Check; 7-14 Share; 14-25 Present/model; 25-44 Apply route choice/practice; 44-52 independent exam-style check; 52-60 Recall & Review, WWW/EBI and next step.
I used my working and assessment evidence to identify the exact mathematical step that was secure and the specific misconception that needs attention.
I will correct one precise step, explain why the correction works and complete a fresh delayed question without the original scaffold.
Stretch: A solid enlarges by length factor 2.5. Find surface area and volume factors.
Deep challenge: A learner uses the area factor for volume. Explain why this fails with dimensions.