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PRIMARY ENGLISH OS (V1.1)

Definition Lock (V1.1)

Primary English OS builds reliable scoring by stabilising: vocabulary retrieval, grammar control, comprehension inference, and writing production under time pressure.

What mastery actually is (P3)

P3 Primary English means the student can:

  • read and infer accurately (literal + implied),
  • write with structure, clarity, and correct language control,
  • retrieve vocabulary quickly (not “on the tip of the tongue”),
  • remain stable across paper types and unfamiliar passages.

Top 6 failure modes

  1. Vocabulary retrieval gap (knows words passively; can’t use them)
  2. Grammar drift under speed (tense, agreement, punctuation collapse)
  3. Comprehension inference failure (cannot support answers with evidence)
  4. Question-type mismatch (literal vs inferential vs author’s intent)
  5. Writing structure failure (no planning; weak paragraph logic)
  6. Editing blindness (cannot detect own errors)

Sensor Pack (Primary English)

  • Active Vocabulary Output (AVO): can use target words in sentences correctly
  • Grammar Stability Index (GSI): error rate under timing
  • Comprehension Evidence Rate (CER): answers supported with text evidence
  • Inference Accuracy (IA): implied meaning questions
  • Writing Structure Integrity (WSI): clear beginning–middle–end + paragraph purpose
  • Editing Catch Rate (ECR-Eng): catches own errors in review pass
  • Time Pressure Collapse (TPC): quality drop under exam timing

Repair Loops (Primary English OS)

Loop 1 — Active Vocabulary Conversion

  • Word → definition → collocations → sentence → rewrite in new context (TS for vocab)

Loop 2 — Grammar Under Load

  • Micro-drills (target grammar) → timed application → edit pass
  • Track GSI + ECR-Eng

Loop 3 — Comprehension Evidence Loop

  • Question → locate clue → paraphrase answer → cite phrase
  • Track CER + IA

Loop 4 — Writing Production Loop

  • Plan (3–5 mins) → write → edit pass with checklist → rewrite one paragraph
  • Track WSI + error reduction

Directory to levels (Primary 1–6)

  • Pri 1–2: reading fluency + basic sentence control + vocab base
  • Pri 3–4: comprehension question types + paragraph writing + grammar stability
  • Pri 5: inference + synthesis + richer vocabulary output
  • Pri 6 / PSLE ramp: timed writing + comprehension reliability + editing discipline

Canonical takeaways (V1.1)

  • English improves fastest when you measure output, not exposure.
  • Writing is a production pipeline with planning + editing loops.
  • Reliability comes from stable language control under time.

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