0–4 orient: Show 3% every month in the exhibition message; ask which source would establish that period. 4–9 source read: Read the desk note's per year, simple, and two years. 9–16 model: Write I = P × i × n; keep $, decimal 0.03/year, and 2 years visible. Sketch a model where interest is calculated on the same $1,200 principal each year. 16–27 route: Learners calculate interest and ending balance, then revise the message without predicting equipment affordability. 27–32 audit: Compare the revised claim to the original—did the month disappear and did any upgrade become bounded? 32–35 exit: Collect $72 and $1,272 with a reason. After this lesson, give fresh Check A if scheduled; collect its first response before showing the public key.
Development draft · local review needed
Day 15 · Interest has a time unitYear 11 Inquiry · T1 W3–4 · Day 15 lesson
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Year 11 / Integrated / Term 1 / Weeks 03 04
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.
Teacher copy: This page may include teaching prompts or answer keys. Answer keys in this public library can be viewed by anyone. Give learners a clean prompt, use checks as formative evidence, and change a case locally when prior access matters.