Night Before Guide

Provenance: compiled 2026-09-29. No new primary-source extraction — every claim below is inherited from research/veridian/WMA11-verified-facts.md §2 and §4, and from this folder's forge-forty-eight-hour-checklist.md and forge-spaced-repetition-schedule.md (read in full before drafting, specifically to stay additive to both — neither is repeated here). This is deliberately the shortest, last document in the sequence: not a schedule, not a formula sheet (forge-battle-card.md owns that), not exam-day mechanics (forge-exam-technique-guide.md §5, forge-exam-day-protocol-extended.md). Not affiliated with or endorsed by Pearson Edexcel.

#WMA11 — The Night Before

#Pearson Edexcel IAL Mathematics, Unit 1: Pure Mathematics P1

Five real things worth a last glance tonight, and four things not to start. Nothing else.

#Worth a last look

• "Translation," not "shift" or "move." The single most frequently confirmed named sub-topic in this paper's research (4 of 5 fully-read series) is graph transformations in words. On the one series with a detailed breakdown, examiners found it "extremely rare" to see a fully correct description, because candidates knew the graph moved but wouldn't write the word "translation" (Jan 2023 Q7(b) — facts bank §4.1).
• Sector area needs its ½; a "major" arc/sector needs 2π − θ first. The most consistently recurring question type across the whole corpus (3 of 5) is sector area/arc length, and its two real, repeated losses are dropping the ½ from A = ½r²θ (Jan 2023 Q6) and using the minor angle where the major arc was asked for (Oct 2021 Q7) — facts bank §4.3.
• Discriminant-with-a-parameter: check k = 0 separately, and use a strict inequality. Two independent series show the same pair of losses — candidates solving the inequality in k correctly, then forgetting a stated k ≠ 0 constraint, or writing ≤ where < was needed at the boundary (Jan 2023 Q4, Jan 2019 Q9 — facts bank §4.1).
• Hidden-quadratic substitution: solve back for the original variable. Confirmed on two independent series — candidates correctly solve the quadratic in the substituted variable (e.g. p = 3ˣ) and then simply stop, never returning to find x itself (Jan 2023 Q5, Jan 2025 Q4(b) — facts bank §4.1).
• The formula booklet's entire P1 section is two lines: sphere/cone mensuration, and the cosine rule. Everything else — quadratic formula, sine rule, ½ab sin C, arc length, sector area, both power rules — has no fallback on the page if memory fails tonight (facts bank §2).

Also worth five minutes: check the calculator itself against the printed restriction (no symbolic algebra, no symbolic differentiation/integration, no stored retrievable formulae — facts bank §2) while there's still time to swap it, not in tomorrow's queue.

#Not tonight

• Content that isn't on this paper. The chain rule is explicitly excluded by the spec ("Knowledge of the chain rule is not required," 4.1); the factor/remainder theorem, circle geometry, sequences/series, exponentials and logarithms are all P2/P3. None of it can appear.
• A technique you've never had solidly. If tonight is the first time you'd be learning it, a 90-minute paper tomorrow isn't where it gets safe to use.
• Reciprocal inequalities, if you don't already have the method. Real P1 content with no dedicated lesson file in this course — a fast read of one CODEX section is the honest ceiling for tonight; building the intuition from scratch isn't (48-hour checklist §4).
• A new past paper, a new topic, or a new calculator setting. If you haven't practised with it already, tonight is not the night to start.

No likelihood, no grade boundary, and no "confirmed in every series" claim appears above — none exists in this course's verified sources for WMA11 (facts bank §7; spaced-repetition schedule §5–6).