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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Secondary 4 Additional Mathematics Learning Guide | Verification, Timing and Examination Recovery
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Secondary 4 Additional Mathematics Learning Guide | Worked Solutions, Hint Fading and Independent Reconstruction
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Secondary 4 Additional Mathematics Sengkang | The Voyage of Water
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Secondary 4 Additional Mathematics Tuition Sengkang | SEC 2027+ A-Math
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Secondary 4 English Examination Preparation | Protect the Working System
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Secondary 4 English Learning Guide | Argument, Evaluation and Discursive Writing
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Secondary 4 English Learning Guide | Comprehension Question Types and Answer Precision
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Secondary 4 English Learning Guide | Continuous Writing: Prompt Choice, Development, Style and Timed Revision
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Secondary 4 English Learning Guide | Editing, Situational Writing and Continuous Writing
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Secondary 4 English Learning Guide | Editing: Advanced Grammar, Sentence Boundaries and Error Control
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Secondary 4 English Learning Guide | Exam Error Analysis and Final Transfer
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Secondary 4 English Learning Guide | Language Effects: Word Choice, Imagery, Tone and Writer’s Perspective
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Secondary 4 English Learning Guide | Listening, Note-Taking and Real-Time Inference
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Secondary 4 English Learning Guide | Listening, Oral Communication, Vocabulary and Final Revision
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Secondary 4 English Learning Guide | Oral Communication: Planned Response, Spoken Interaction and Recovery
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Secondary 4 English Learning Guide | Reading, Comprehension, Inference and Summary Under Time
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Secondary 4 English Learning Guide | Situational Writing: Audience, Context, Information Transformation and Tone
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Secondary 4 English Learning Guide | Summary Mastery and Compression
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Secondary 4 English Learning Guide | The Last-Mile Examination Control System
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Secondary 4 English Learning Guide | Visual and Multimodal Text: Purpose, Layout, Evidence and Evaluation
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Secondary 4 English Learning Guide | Vocabulary in Context, Collocation, Register and Precision
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Secondary 4 English Sengkang | The Last-Mile Error Map
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Secondary 4 English Sengkang | The Voyage of Water
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Secondary 4 English Sengkang | Why 3-Pax Helps Last-Mile Examination Control
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Secondary 4 English Tuition at Punggol | O-Level Excellence with eduKate
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Secondary 4 English Tuition Sengkang | SEC 2027+ Exam Preparation
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Secondary 4 English Tutor | Curie Series | Integration, SEC and the Handover Beyond Secondary School
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Secondary 4 Mathematics 2026 | Final GCE Cohort Before SEC 2027 | Examination Craft
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Secondary 4 Mathematics Classroom | Chapter 1: Sets | SEC G3 K310
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Secondary 4 Mathematics Classroom | Chapter 2: Probability of Combined Events | SEC G3 K310
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Secondary 4 Mathematics Classroom | Chapter 3: Statistical Data Analysis | SEC G3 K310
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Secondary 4 Mathematics Classroom | Chapter 4: Matrices | SEC G3 K310
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Secondary 4 Mathematics Classroom | Chapter 5: Vectors | SEC G3 K310
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Secondary 4 Mathematics Classroom | Chapter 6: Numbers and Algebra Revision | SEC G3 K310
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Secondary 4 Mathematics Classroom | Chapter 7: Geometry and Measurement Revision | SEC G3 K310
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Secondary 4 Mathematics Classroom | Chapter 8: Probability and Statistics Revision | SEC G3 K310
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Secondary 4 Mathematics Classroom | Chapter-by-Chapter Learning Route | SEC G3 K310
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Secondary 4 Mathematics Learning Guide | Accuracy, Estimation and Calculator Discipline
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Secondary 4 Mathematics Learning Guide | Algebra, Functions and Graphs Under Mixed-Topic Conditions
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Secondary 4 Mathematics Learning Guide | Algebraic Expansion, Factorisation and Equivalent Forms
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Secondary 4 Mathematics Learning Guide | Algebraic Formulae, nth-Term Patterns and Change of Subject
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Secondary 4 Mathematics Learning Guide | Algebraic Fractions: Multiply, Divide, Add and Subtract
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Secondary 4 Mathematics Learning Guide | Angles, Polygons, Parallel Lines and Symmetry
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Secondary 4 Mathematics Learning Guide | AO2 Model Building: Relevant Information, Assumptions, Constraints and Validation
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Secondary 4 Mathematics Learning Guide | AO2 Translation: From Words, Tables, Graphs and Diagrams to Mathematics
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Secondary 4 Mathematics Learning Guide | AO3 Mathematical Argument: Justification, Counterexamples, Evidence and Complete Explanations
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Secondary 4 Mathematics Learning Guide | Bearings, Sine Rule, Cosine Rule and Triangle Area
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Secondary 4 Mathematics Learning Guide | Boundary Cases and Admissible Solutions: Domains, Restrictions, Integer Constraints and Impossible Answers
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Secondary 4 Mathematics Learning Guide | Build an Examination Route Before You Calculate
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Secondary 4 Mathematics Learning Guide | Circle Theorems and Geometrical Proof
Browse every published Post
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Advanced Science Tutorials | Science Project Ideas: Safe Experiments, Fair Tests and Measurable Questions
106–159 minutes -
Advanced Science Tutorials | Science Project Ideas for Students: 80 Safe Investigations From Primary to Secondary
93–140 minutes -
Advanced Science Tutorials | Scientific Investigation Cycle: Questions, Methods, Data and Conclusions
106–158 minutes -
Advanced Additional Mathematics Tutorials | How Much A-Math Practice Is Enough? Questions, Hours, Past Papers and Diminishing Returns
5–8 minutes -
Advanced Additional Mathematics Tutorials | How to Solve Unfamiliar A-Math Questions Without Memorising Every Question Type
6–9 minutes -
Advanced Mathematics Tutorials | Primary 6 Mathematics: PSLE Problem Solving, Ratio, Speed, Algebra and Exam Control
19–29 minutes -
Advanced Additional Mathematics Tutorials | A-Math Weekly Study Schedule — Balance School, Homework, Old Topics and Exam Practice
6–10 minutes -
Advanced Additional Mathematics Tutorials | How to Score A1 in A-Math — What Distinction-Level Performance Actually Requires
6–10 minutes -
Advanced Science Tutorials | Chemistry Reasoning: Five Questions for Matter, Particles and Reactions
92–138 minutes -
Advanced English Tutorials | How to Improve English Exam Skills for PSLE and SEC
17–26 minutes -
Advanced English Tutorials | How to Improve English Editing and Error Correction Skills
18–27 minutes -
Advanced Science Tutorials | Scientific Method: Investigation Decisions, Variables and Evidence
100–150 minutes -
Advanced Mathematics Tutorials | Why Primary 5 Mathematics Marks Fall: Hidden Dependency Gaps Behind Fractions, Percentage and Ratio
11–16 minutes -
Advanced English Tutorials | How to Improve English Cloze Passage Skills
17–25 minutes -
Advanced English Tutorials | How to Improve English Pronunciation and Reading Aloud
17–26 minutes -
Advanced Mathematics Tutorials | The Primary 3 Multi-Step Reasoning Shift: How Students Learn to Plan Before Calculating
13–19 minutes -
Advanced Mathematics Tutorials | Primary 6 Mathematics: PSLE Problem Solving, Revision and Exam Control
9–14 minutes -
Advanced Science Tutorials | Chemistry Foundations: Matter, Particles, Mixtures and Chemical Change
86–128 minutes -
Advanced Mathematics Tutorials | Primary 5 Mathematics: Ratio, Percentage, Fractions, Decimals and Multi-Step Problems
8–12 minutes -
Advanced Additional Mathematics Tutorials | How Parents Can Help With A-Math Homework Without Doing the Mathematics for Their Child
6–9 minutes -
Advanced Additional Mathematics Tutorials | From A-Math to JC Mathematics — What Skills Carry Forward After Secondary School
6–8 minutes -
Advanced Additional Mathematics Tutorials | A-Math Algebra Mastery — Factorisation, Indices, Equations and Fractions That Unlock the Subject
5–8 minutes -
Advanced Additional Mathematics Tutorials | I Know the Formula but I Don’t Know How to Start the A-Math Question
7–10 minutes -
Advanced Mathematics Tutorials | Why Primary 2 Word Problems Go Wrong: From Keywords to Mathematical Relationships
14–22 minutes -
Advanced Mathematics Tutorials | Primary 3 Mathematics: Fractions, Models, Multiplication and Multi-Step Problem Solving
10–15 minutes -
Advanced Mathematics Tutorials | Primary 2 Mathematics: Multiplication, Division, Fractions and Word Problems
11–17 minutes -
Advanced English Tutorials | How to Improve English Listening Skills for PSLE and SEC
17–25 minutes -
Advanced Science Tutorials | Environmental Science for Students: Ecosystems, Pollution, Conservation and Climate
12–18 minutes -
Advanced English Tutorials | How to Improve English Speaking and Oral Communication
17–25 minutes -
Advanced Science Tutorials | Earth Science for Beginners: Weather, Water Cycle, Rocks, Climate and Earth Systems
11–17 minutes -
Advanced Additional Mathematics Tutorials | How to Catch Up in A-Math Without Restarting the Whole Mathematics Syllabus
7–10 minutes -
Advanced Additional Mathematics Tutorials | What a 3-Student A-Math Tutorial Should Actually Do
7–11 minutes -
Advanced Additional Mathematics Tutorials | Can You Self-Study A-Math? When Independent Study Works and When Help Matters
8–11 minutes -
Advanced Additional Mathematics Tutorials | E-Math vs A-Math — What Actually Changes When Students Move Into Additional Mathematics
7–10 minutes -
Advanced English Tutorials | How to Build English Vocabulary for School and Exams
17–25 minutes -
Advanced Science Tutorials | Physics for Beginners: Forces, Energy, Heat, Light and Electricity
11–16 minutes -
Advanced English Tutorials | How to Improve English Grammar and Sentence Structure
17–25 minutes -
Advanced Science Tutorials | Biology for Beginners: Cells, Living Systems, Human Body and Ecosystems
13–19 minutes -
Advanced Science Tutorials | Science Experiments at Home: Safe Fair Tests, Variables, Evidence and Conclusions
10–14 minutes -
Advanced Science Tutorials | How to Read Science Diagrams, Graphs and Tables Without Guessing
10–15 minutes -
Advanced Science Tutorials | Science Vocabulary: How to Learn Scientific Terms and Use Them Correctly
10–15 minutes -
Advanced Science Tutorials | How to Improve Science Grades Without Doing More Worksheets
12–18 minutes -
Advanced Additional Mathematics Tutorials | A-Math Exam Technique — Time Management, Method Marks and Final Checks
8–11 minutes -
Advanced Additional Mathematics Tutorials | How to Improve A-Math Quickly — A 30-Day Recovery Plan
7–11 minutes -
Advanced Additional Mathematics Tutorials | A-Math Past Papers — How to Use Them Without Rehearsing the Same Mistakes
8–12 minutes -
Advanced Additional Mathematics Tutorials | How to Revise A-Math Effectively — From Weak Topic to Mixed-Paper Control
8–12 minutes -
PSLE Science Reality Lab Vol No.581 | “Solar Wind Speed = 600 km/s” — Is Air Blowing Through Earth’s Atmosphere at 600 km/s?
8–12 minutes -
Advanced Additional Mathematics Tutorials | A-Math Notes and Formula Revision — Build a Study System That Works Under Exam Pressure
10–15 minutes -
Advanced Additional Mathematics Tutorials | Common A-Math Mistakes — Why Correct Ideas Still Lose Marks
10–16 minutes -
Advanced Science Tutorials | From PSLE to Secondary Science G1, G2 and G3: A Parent Guide
11–16 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.
