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Day 2 — Totals must agreeYear 12 Maths · T1 W1–2 · Day 2 lesson

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Year 12 / Mathematics / Term 1 / Weeks 01 02

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

Open for this lesson: Pack 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.

Success: Complete row, column and grand totals and cross-check them two ways.

  1. Notice · 3 min. Display Card A with question marks. Ask which sums should agree at the bottom-right cell.
  2. Model · 5 min. Complete morning 12 + 8 = 20. Say “row total is visits in this session, across both choices”.
  3. Try · 6 min. Learners complete afternoon, quiet and group totals independently, with counters or a table reader if helpful.
  4. Compare · 5 min. Add row totals and column totals separately. Both must give 40; diagnose a deliberate incorrect bottom-right 42.
  5. Transfer · 4 min. Ask which total answers “all quiet-table visits” and which answers “all afternoon visits”, with labels.
  6. Exit · 2 min. Collect completed four cells and one cross-check. Reteach row/column orientation if either total differs.

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