0–4 launch: Read the mobile science-display caption with only the described $48 crop; ask what earlier value a viewer cannot see. 4–9 source: Reveal the $60 starting price and 20% decrease; the picture is an invented description, not a scientific record. 9–16 model: $60×0.20=$12, so $48; returning needs $12÷$48=25% increase. 16–27 independent route: Learners use a change ladder, proportional strips or a private explanatory script. 27–32 audit: Test the wrong repeated 20% of $48 = $9.60, giving $57.60, and explain why the crop makes the first base easy to miss. 32–35 exit: Give a claim naming both starting amounts and percentages.
Development draft · local review needed
Day 26 · The photograph shows a label, not a reverse ruleYear 11 Inquiry · T1 W5–6 · Day 26 lesson
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Year 11 / Integrated / Term 1 / Weeks 05 06
Part of the full two-week lesson sequence. Check the pack guide and taught point before teaching.
Open for this lesson: Pack guide · Fresh learner checks · Aids and text routes.
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