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Day 2 — A table is a model, not a quotationYear 8 Maths · T1 W1–2 · Day 2 lesson

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Year 8 / Term 1 / Weeks 01 02 / Mathematics

Part of the full two-week lesson sequence. Check the pack guide and taught point before teaching.

Open for this lesson: Sources and materials · Check guide.

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.

Success: calculate a table and identify what the model omits. (AC9M8A03)

Recall · 2 min. Ask for A and B at zero repairs: $18 and $0.
Model · 4 min. Fill n=2 and n=4: A $32/$46, B $20/$40; use substitution so each entry can be checked.
Guided finish · 5 min. Class completes n=6: both $60. Ask why equality at one count does not make all counts equal.
Independent table · 7 min. Learners fill n=8: A $74, B $80, then compare at n=0,2,4,6,8 in a sentence.
Assumption scan · 4 min. Circle omitted parts/quality/travel/eligibility. A correct model answer is not a real cheapest purchase claim.
Exit · 3 min. “At eight repairs, which model total is lower and by how much?” Key: A by $6.

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