0–4 launch: Show the team's two imagined cropped price cards with 25% up, 25% down. 4–9 source: Reveal $96 and $120, and ask what the crop does not show about product quality or access. 9–16 model: Mark $24 rise as 24/96=25%; to return, $24 decrease is 24/120=20%. Put both bases on the change ladder. 16–27 independent route: Learners produce a two-step receipt, tactile ladder or private spoken/AAC explanation; the optional offline change-base lab follows a prediction and has a paper route. 27–32 audit: Pair checks whether a second 25% cut would reach $90, not $96. 32–35 exit: Replace the cancellation claim with an exact conditional return statement.
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Day 24 · The return percentage changes baseYear 11 Inquiry · T1 W5–6 · Day 24 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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