The 20-route learning estate
eduKateSengkang is organised as a Learning Castle: existing subject hubs, level routes, examination routes and learning-system pages retain their jobs. This page is the master upgrade directory. It does not replace those owners. It makes the work visible, assigns every upgrade to one route, and gives new or substantially revised articles stable IDs so later batches can be connected without losing track of what is complete.
Numbering rule
Each route has a -000 hub pointer. Article slots then use reserved tens: -010, -020, -030 and so on. The first upgrade programme reserves up to 150 article slots per route, ending at -1500. Existing high-value URLs are upgraded in place wherever practical; the ID identifies the editorial job, not a requirement to create a new URL.
| Route | Hub ID | Primary job | Existing owner / destination | Reserved article IDs | Status |
|---|---|---|---|---|---|
| SK-01 | SK-01-000 | Homepage, Sengkang Tuition, commercial/navigation/root accuracy | Homepage / Tuition Centre owner | SK-01-010–SK-01-1500 | OPEN |
| SK-02 | SK-02-000 | Primary 1–3 English | Primary English Learning Hub | SK-02-010–SK-02-1500 | OPEN |
| SK-03 | SK-03-000 | Primary 4–6 English + PSLE English | Primary English Learning Hub / PSLE Learning Guide | SK-03-010–SK-03-1500 | OPEN |
| SK-04 | SK-04-000 | Secondary 1–2 English | English Hub | SK-04-010–SK-04-1500 | OPEN |
| SK-05 | SK-05-000 | Secondary 3–4 English + SEC English | English Hub | SK-05-010–SK-05-1500 | OPEN |
| SK-06 | SK-06-000 | Vocabulary, grammar, reading, writing and English skills | Complete English Index | SK-06-010–SK-06-1500 | OPEN |
| SK-07 | SK-07-000 | Primary 1–3 Mathematics | Mathematics Hub | SK-07-010–SK-07-1500 | OPEN |
| SK-08 | SK-08-000 | Primary 4–6 Mathematics + PSLE Mathematics | Mathematics Hub / PSLE Learning Guide | SK-08-010–SK-08-1500 | OPEN |
| SK-09 | SK-09-000 | Secondary 1–2 Mathematics | Mathematics Hub | SK-09-010–SK-09-1500 | OPEN |
| SK-10 | SK-10-000 | Secondary 3–4 Mathematics + SEC Mathematics | Mathematics Hub | SK-10-010–SK-10-1500 | OPEN |
| SK-11 | SK-11-000 | Additional Mathematics | Additional Mathematics owner | SK-11-010–SK-11-1500 | OPEN |
| SK-12 | SK-12-000 | Primary 3–4 Science | Science Hub | SK-12-010–SK-12-1500 | OPEN |
| SK-13 | SK-13-000 | Primary 5–6 Science + PSLE Science | Science Hub / PSLE Science Learning Guide | SK-13-010–SK-13-1500 | OPEN |
| SK-14 | SK-14-000 | Secondary Science + scientific reasoning | Science Hub | SK-14-010–SK-14-1500 | OPEN |
| SK-15 | SK-15-000 | Learning Castle, Learning Runtime and study methods | Learning Runtime Hub | SK-15-010–SK-15-1500 | OPEN |
| SK-16 | SK-16-000 | Examination performance, revision, assessment and error repair | Examination Craft | SK-16-010–SK-16-1500 | OPEN |
| SK-17 | SK-17-000 | Parent guides, tuition, teaching and student support | Parents’ Guide | SK-17-010–SK-17-1500 | OPEN |
| SK-18 | SK-18-000 | Algorithms, computing and advanced mathematics | Algorithms & Computing Hub | SK-18-010–SK-18-1500 | OPEN |
| SK-19 | SK-19-000 | Advanced science and world-knowledge science material | Complete Science Index | SK-19-010–SK-19-1500 | OPEN |
| SK-20 | SK-20-000 | Estate archaeology: duplication, location leakage, orphan control, cannibalisation and consolidation candidates | Learning Castle Registry | SK-20-010–SK-20-1500 | OPEN |
Article register
The first-wave titles and status ledger are live in the eduKate Sengkang Article Register | SK-01 to SK-20. Use it to claim the next article ID, see protected owners and avoid duplicating work already active in another branch.
Protection-first reader standard
All 20 branches now follow the eduKate Sengkang Reader Experience Standard: protect strong pages, connect isolated pages, improve formatting only where it helps, use bounded surgery for specific defects, and modernise only when the existing article no longer completes its reader job.
Article state
Every inspected URL receives one state before work begins: PROTECT for ranking or strategically sensitive owners; KEEP for sound pages needing no substantial rewrite; MODERNISE for useful but outdated pages; SURGERY for small bounded repairs; RETARGET for pages that need a distinct adjacent search job; CONSOLIDATION CANDIDATE for overlapping intent that requires owner review; LOCATION LEAKAGE for misplaced locality; or HISTORICAL for material worth preserving without major reinvestment.
Completion rule
An article ID becomes complete only when the assigned existing URL or new article has a defined reader job, correct owner, current factual scope, useful internal return path and no unresolved collision with another Sengkang owner. A branch can therefore inspect more than 150 URLs without rewriting 150 pages. The 150 slots are a controlled first-wave capacity, not a quota.
Castle relationship
This programme sits under the existing Learning Castle and follows its one-owner-many-routes rule. English, Mathematics, Science, Examination Craft, Learning Runtime and Algorithms retain their existing canonical roles. The master directory exists to coordinate upgrades and make unfinished work visible; it does not create twenty competing subject hubs.
Complete-index crosswalk
Use the 20 routes above to decide ownership and upgrade work. Use these Complete Archives when the job is enumeration, orphan control or direct deep-article discovery.
English Archive · Mathematics Archive · Science Archive · Examination Archive · Learning Runtime Archive · Algorithms & Computing Archive
Deep fallback discovery
The subject hubs and Complete Archives remain the preferred routes. These live indexes are the final orphan-control layer: they expose every published Page and Post through paginated internal links so newly published or unusually placed content still has a crawlable return path while specialist routing is updated.
Browse every published Page
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Primary 5 Science Learning Guide | Mastery Diagnostic & Repair Lab
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Primary 5 Science Learning Guide | Measurement, Units, Range & Resolution
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Primary 5 Science Learning Guide | Mixed-Concept Transfer Challenge Lab
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Primary 5 Science Learning Guide | Models, Assumptions, Simplification & Limits
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Primary 5 Science Learning Guide | Observation, Inference, Prediction & Conclusion
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Primary 5 Science Learning Guide | Open-Ended Answer Construction Application Lab
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Primary 5 Science Learning Guide | Plant & Human Reproduction Comparison, Sequence & Evidence
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Primary 5 Science Learning Guide | Plant & Human Systems Application Lab
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Primary 5 Science Learning Guide | Plant Transport, Respiratory & Circulatory Systems
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Primary 5 Science Learning Guide | Pollination, Fertilisation, Seeds & Fruits
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Primary 5 Science Learning Guide | Practical Planning, Data Recording & Conclusions
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Primary 5 Science Learning Guide | Primary 5 to Primary 6 Bridge, Consolidation & the PSLE Runway
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Primary 5 Science Learning Guide | Question Deconstruction, Conditions & Constraints
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Primary 5 Science Learning Guide | Rates, Time, Change & Comparative Reasoning
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Primary 5 Science Learning Guide | Reliability, Accuracy, Validity & Data Quality
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Primary 5 Science Learning Guide | Reproduction Application Lab
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Primary 5 Science Learning Guide | Reproduction in Plants and Humans
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Primary 5 Science Learning Guide | Retrieval, Spaced Review & Concept Transfer
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Primary 5 Science Learning Guide | Scaling, Ratios, Proportional Thinking & Estimation
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Primary 5 Science Learning Guide | Scientific Communication & Evidence Chains
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Primary 5 Science Learning Guide | Scientific Vocabulary & Precision Challenge Lab
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Primary 5 Science Learning Guide | Self-Checking & Exam Readiness Challenge Lab
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Primary 5 Science Learning Guide | Sequence, Cycles, Dependencies & Order of Events
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Primary 5 Science Learning Guide | Structure, Function, Systems & Cause-and-Effect
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Primary 5 Science Learning Guide | Variables, Fair Tests & Experimental Design
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Primary 5 Science Learning Guide | Water & Food Transport in Plants
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Primary 5 Science Learning Guide | Water & State Change Application Lab
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Primary 5 Science Learning Guide | Water, Changes of State, the Water Cycle & Evidence
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Primary 5 Science Learning Guide | What-If Changes & System Failure Reasoning
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Primary 5 Science Learning Hub | Water, Reproduction, Systems & Electricity
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Primary 5 Science Punggol | Legacy Entry to Systems & Variables
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Primary 5 Science Punggol | Systems, Variables & the PSLE Runway
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Primary 5 Science Sengkang | Systems & Variables Diagnostic
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Primary 5 Science Sengkang | The Voyage of Water
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Primary 5 Science Tuition Punggol | Systems, Variables and Interactions | The Voyage Series
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Primary 5 Science Tuition Sengkang | Systems, Variables & PSLE Foundations
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Primary 5 Science Tuition | Answering Techniques for Open-Ended Questions
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Primary 5 Science Tuition | Conductors and Insulators in Electrical Circuits
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Primary 5 Science Tuition | For Beginners: The Year Science Becomes Serious
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Primary 5 Science Tuition | How Are Seeds Dispersed? Wind, Water, Animals and Explosive Action
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Primary 5 Science Tuition | How Do Water and Food Move Through Plants?
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Primary 5 Science Tuition | How Does Blood Transport Oxygen and Carbon Dioxide?
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Primary 5 Science Tuition | Pollination, Fertilisation, Seeds and Fruits
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Primary 5 Science Tuition | The PSLE Science Engine Year
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Primary 5 Science Tuition | The Revision System for the Year Before PSLE
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Primary 5 Science Tuition | What Do Seeds Need to Germinate? Water, Air and Suitable Warmth
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Primary 5 Science Tuition | What Happens When One Bulb Is Removed? Series and Parallel Circuits
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Primary 5 Science Tuition | Where Will Water Droplets Form?
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Primary 5 Science Tuition | Which Switch Controls Which Bulb?
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Primary 5 Science Tuition | Why Do Bulbs Get Dimmer? Circuit Changes and Brightness
Browse every published Post
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Advanced English Tutorials | How to Take Better Notes, Annotate Texts and Remember What You Read
18–26 minutes -
Advanced Additional Mathematics Tutorials | How to Know Whether A-Math Tuition Is Actually Working
5–8 minutes -
Advanced Mathematics Tutorials | Choosing Primary Mathematics Tuition in Sengkang — 12 Questions Parents Should Ask
5–7 minutes -
Advanced English Tutorials | How to Use Punctuation, Capitalisation and Sentence Boundaries Correctly
17–25 minutes -
Advanced Mathematics Tutorials | Why Primary Mathematics Homework Takes So Long — Diagnose the Minutes Before Adding More Work
4–6 minutes -
Advanced Mathematics Tutorials | Primary Mathematics Holiday Revision — Repair Weak Foundations or Get a Head Start?
4–6 minutes -
Advanced Mathematics Tutorials | PSLE Mathematics Paper 1 vs Paper 2 — How the 2026 Revised Format Changes Preparation
5–7 minutes -
Advanced Additional Mathematics Tutorials | Secondary 3 vs Secondary 4 A-Math Tuition — The Teaching Job Should Change
4–6 minutes -
Advanced Additional Mathematics Tutorials | Is A-Math Useful If You Are Not Going to JC? Polytechnic, Engineering and Technical Pathways
5–7 minutes -
Advanced Science Tutorials | Scientific Reasoning Skills for Students: Observation, Inference, Evidence and Causation
96–144 minutes -
Advanced Additional Mathematics Tutorials | When Should My Child Start A-Math Tuition? Secondary 2, 3 or 4
5–7 minutes -
Advanced Science Tutorials | Science Revision Timetable and Weekly Study Plan for Primary, PSLE and Secondary
109–164 minutes -
Advanced English Tutorials | How to Improve Creative Writing: Ideas, Plot, Character, Description and Revision
16–24 minutes -
Advanced Mathematics Tutorials | Choosing Secondary Mathematics Tuition in Sengkang — 12 Questions Parents Should Ask
6–9 minutes -
Advanced English Tutorials | How to Write Strong English Paragraphs: Topic Sentences, Evidence and Cohesion
16–24 minutes -
Advanced Science Tutorials | Science Calculations and Formulae: Units, Equations, Percentages and Problem Solving
102–153 minutes -
Advanced Mathematics Tutorials | Secondary Mathematics Calculator Discipline — Estimation, Exactness, Rounding and Input Control
4–7 minutes -
Advanced English Tutorials | How to Improve English Spelling, Word Formation and Dictation
17–25 minutes -
Advanced Mathematics Tutorials | Why Strong Secondary Mathematics Students Plateau — The Precision Problems Behind the Last Few Marks
5–7 minutes -
Advanced English Tutorials | How to Improve Reading Fluency, Speed and Stamina
17–26 minutes -
Advanced Additional Mathematics Tutorials | Hardest A-Math Topics — Why Trigonometry, Logarithms, Calculus and Mixed Questions Feel Difficult
6–9 minutes -
Advanced Science Tutorials | Accuracy, Precision and Uncertainty in Science: Error, Reliability and Validity
103–154 minutes -
Advanced Additional Mathematics Tutorials | 20 Parent Mistakes That Can Make A-Math Harder
5–8 minutes -
Advanced Additional Mathematics Tutorials | The Last 24 Hours Before an A-Math Exam — What to Do and What Not to Do
3–5 minutes -
Advanced Mathematics Tutorials | Is One Mathematics Tuition Lesson a Week Enough for Primary and PSLE?
5–7 minutes -
Advanced Mathematics Tutorials | PSLE Mathematics After Prelims — Turn the Prelim Paper Into a Final Recovery Plan
4–6 minutes -
Advanced Mathematics Tutorials | Primary 5 to Primary 6 Mathematics Transition — What Changes Under the 2026 Syllabus
4–7 minutes -
Advanced Mathematics Tutorials | When Should PSLE Mathematics Preparation Start? Primary 5 or Primary 6?
5–7 minutes -
Advanced Science Tutorials | Scientific Models for Students: Physical, Conceptual, Mathematical and Computer Models
108–162 minutes -
Advanced Additional Mathematics Tutorials | Why A-Math Homework Takes So Long — Diagnose the Minutes Before Telling Students to Work Faster
5–8 minutes -
Advanced Mathematics Tutorials | Secondary Mathematics After Prelims — Turn the Prelim Paper Into a Final Exam Recovery Plan
5–8 minutes -
Advanced Mathematics Tutorials | Is One Secondary Mathematics Tuition Lesson a Week Enough?
6–9 minutes -
Advanced Mathematics Tutorials | Secondary Mathematics Holiday Revision — Repair Weak Foundations or Get a Head Start?
5–8 minutes -
Advanced Mathematics Tutorials | How to Score A1 in G3 Mathematics — What Distinction-Level Performance Actually Requires
6–9 minutes -
Advanced Mathematics Tutorials | Secondary Mathematics Resources — School Notes vs Textbook vs Assessment Books vs Past Papers
6–8 minutes -
Advanced Science Tutorials | How to Write a Science Lab Report: Aim, Method, Results, Discussion and Conclusion
93–139 minutes -
Advanced Science Tutorials | Science Laboratory Safety Rules for Students: Hazards, Risk, PPE and Safe Practical Work
87–130 minutes -
Advanced English Tutorials | How to Write Argumentative and Discursive English With Evidence and Judgement
18–27 minutes -
Advanced Science Tutorials | Practical Science Skills: Measurement, Equipment, Observation and Laboratory Technique
106–159 minutes -
Advanced English Tutorials | How to Write Situational English for Audience, Purpose and Task Fulfilment
18–27 minutes -
Advanced Mathematics Tutorials | Private Tutor vs Small-Group Mathematics Tuition — What Parents Should Compare
5–7 minutes -
Advanced English Tutorials | How to Master Sentence Synthesis and Transformation Without Changing Meaning
17–26 minutes -
Advanced Mathematics Tutorials | Self-Study vs Mathematics Tuition — Which Support Does the Student Actually Need?
4–6 minutes -
Advanced Science Tutorials | Common Science Misconceptions: How to Find and Fix Wrong Scientific Ideas
107–160 minutes -
Advanced Mathematics Tutorials | Why Mathematics Homework Is Correct but Test Marks Still Fall
5–7 minutes -
Advanced Additional Mathematics Tutorials | A-Math After Prelims — Turn the Prelim Paper Into a Final Exam Recovery Plan
5–8 minutes -
Advanced Mathematics Tutorials | When Does My Child Need Mathematics Tuition? A Parent Diagnostic Guide
5–8 minutes -
Advanced Additional Mathematics Tutorials | A-Math Holiday Revision — Repair Weak Foundations or Get a Head Start?
4–6 minutes -
Advanced English Tutorials | How to Improve Inference, Evidence and Answer Precision
17–26 minutes -
Advanced Additional Mathematics Tutorials | Is One A-Math Tuition Lesson a Week Enough?
4–6 minutes
Routing rule: use this fallback only for discovery and orphan control. Canonical subject ownership, reader pathways and return logic continue to come from the Learning Castle, subject hubs and Complete Archives.
