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Day 8 — Fixed costs and what remainsYear 11 Maths · T1 W1–2 · Day 8 lesson

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Year 11 / 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.

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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.

Learner choices

Success: build a fictional budget from a total, fixed costs and an unassigned balance.

  1. Read · 2 min. Display the project fund $480; ask learners to distinguish money available from money already planned.
  2. Model · 4 min. Add $120+$70+$45=$235; subtract 480−235=$245 unassigned. No personal finances are discussed.
  3. Guided add-on · 5 min. If two large packs are selected for $54, remaining $191. If the $480 fund is unchanged, total planned cost is $289.
  4. Independent what-if · 7 min. Learners choose either three small packs at $55.20 or two large at $54 for 24 sheets; calculate total planned and remaining, and say what cost is still unknown.
  5. Check · 4 min. Partner verifies planned + remaining = 480 and refuses to set unknown delivery to $0.
  6. Exit · 3 min. Key: with small packs planned $290.20/remaining $189.80; with large $289/remaining $191.

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