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Day 5 · Public fresh check A: a new isotope archiveYear 11 Chemistry · T1 W1–2 · Day 5 lesson

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Year 11 / Chemistry / 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 · Daily routes · Worked swaps · Fresh learner checks · Aids and text routes.

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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 prompts

Target: independently transfer Z/A and isotope comparison to new Files R/S. The check and worked key are public, so it is formative only. Prepare: new case, neutral count mat, support log.

  1. Launch · 2 min. State the task: derive counts, compare two records, and refuse one unsupported claim.
  2. Source access · 4 min. Release Files R/S without the key; note read-aloud, scribing or other access support.
  3. Independent plan · 5 min. Learner marks each given Z/A/status, identifies the subtraction, and notes one claim the files cannot prove.
  4. Independent response · 7 min. Choose Day 5 route and capture a first response; do not supply worked counts during this window.
  5. Self-audit · 4 min. Learner checks p+n=A, neutral e=p and same-Z isotope reasoning.
  6. Submit · 3 min. Collect first response/support log; consult the public key for the next teaching move.

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