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 3 Mathematics Punggol | Build the Upper-Secondary Math Engine
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Secondary 3 Mathematics Sengkang | The Voyage of Water
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Secondary 3 Mathematics Tuition Sengkang | Upper Secondary Math, Transfer & SEC Readiness
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Secondary 3 Mathematics Tutor | Curie Series | Algebra, Functions and Examination-Ready Strategy Control
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Secondary 3 Mathematics | Why the Load Compounds Here | Darwin × Voyage
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Secondary 3 Science Tutor | Curie Series | Biology, Chemistry, Physics and Experimental Control
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Secondary 3 Tuition Sengkang | Upper-Secondary Specialisation & SEC Readiness
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Secondary 3–4 Additional Mathematics Punggol | From Entry to Examination
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Secondary 4 Additional Mathematics Learning Guide | Advanced Differentiation, Rates of Change and Second-Derivative Control
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Secondary 4 Additional Mathematics Learning Guide | Advanced Integration of Trigonometric and Exponential Functions and Signed Areas
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Secondary 4 Additional Mathematics Learning Guide | Algebra Under Pressure, Exact Forms and Manipulation Control
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Secondary 4 Additional Mathematics Learning Guide | Binomial Theorem and Coefficient Reasoning
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Secondary 4 Additional Mathematics Learning Guide | Calculator Discipline, Estimation and Exactness
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Secondary 4 Additional Mathematics Learning Guide | Case Analysis, Branching and Exhaustive Solution Sets
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Secondary 4 Additional Mathematics Learning Guide | Confidence Calibration, Error Prediction and Verification Budgeting
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Secondary 4 Additional Mathematics Learning Guide | Controlled Variation, Near-Miss Questions and Method Discrimination
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Secondary 4 Additional Mathematics Learning Guide | Coordinate Geometry, Circles and Linearisation
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Secondary 4 Additional Mathematics Learning Guide | Differentiation, Tangents, Normals and Stationary Points
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Secondary 4 Additional Mathematics Learning Guide | Domains, Constraints and Solution Filtering
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Secondary 4 Additional Mathematics Learning Guide | Error Maps, Paper Repair and Diagnostic Classification
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Secondary 4 Additional Mathematics Learning Guide | Essential Working, Evidence Preservation and Recoverable Marks
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Secondary 4 Additional Mathematics Learning Guide | Exponential and Logarithmic Functions and Equations
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Secondary 4 Additional Mathematics Learning Guide | Formula Sheet Intelligence, Memory Allocation and Retrieval Control
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Secondary 4 Additional Mathematics Learning Guide | Formula Sheet Intelligence, Memory Allocation and Retrieval Control
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Secondary 4 Additional Mathematics Learning Guide | Functions, Transformations and Inverse Structure
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Secondary 4 Additional Mathematics Learning Guide | Graph Sketching, Asymptotes and Turning-Point Interpretation
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Secondary 4 Additional Mathematics Learning Guide | Hidden Assumed Knowledge, Prerequisites and Fast Repair
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Secondary 4 Additional Mathematics Learning Guide | Integration, Definite Integrals and Area Under Curves
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Secondary 4 Additional Mathematics Learning Guide | Kinematics: Displacement, Velocity and Acceleration
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Secondary 4 Additional Mathematics Learning Guide | Linear Law, Transformations and Parameter Recovery
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Secondary 4 Additional Mathematics Learning Guide | Mastery Checkpoint, Full-Syllabus Diagnostic and Final-Year Readiness
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Secondary 4 Additional Mathematics Learning Guide | Mathematical Communication, Notation and Complete Reasoning
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Secondary 4 Additional Mathematics Learning Guide | Mathematical Modelling and Parameter Problems
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Secondary 4 Additional Mathematics Learning Guide | Method Economy, Shortest Safe Routes and Mark Efficiency
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Secondary 4 Additional Mathematics Learning Guide | Mixed-Topic Route Selection, Transfer and Integration
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Secondary 4 Additional Mathematics Learning Guide | Multi-Constraint Problems, Feasible Sets and Condition Stacking
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Secondary 4 Additional Mathematics Learning Guide | Multi-Stage Question Architecture, Subgoals and Dependency Chains
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Secondary 4 Additional Mathematics Learning Guide | Necessary and Sufficient Conditions, Converses and Logical Structure
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Secondary 4 Additional Mathematics Learning Guide | Non-Routine Problem Solving and Alternative Methods
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Secondary 4 Additional Mathematics Learning Guide | Past-Paper Forensics, Question Archetypes and Pattern Mining
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Secondary 4 Additional Mathematics Learning Guide | Past-Paper Forensics, Question Archetypes and Pattern Mining
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Secondary 4 Additional Mathematics Learning Guide | Plane Geometry Proofs and Circle Theorems
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Secondary 4 Additional Mathematics Learning Guide | Polynomials, Factor and Remainder Theorems and Partial Fractions
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Secondary 4 Additional Mathematics Learning Guide | Quadratic Functions and Discriminant Control
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Secondary 4 Additional Mathematics Learning Guide | Schema Extraction, Solution Compression and Reusable Mathematical Templates
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Secondary 4 Additional Mathematics Learning Guide | Surds, Rationalisation and Exact Algebra
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Secondary 4 Additional Mathematics Learning Guide | Topical-to-Full-Paper Progression, Prelim Calibration and Examination Transfer
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Secondary 4 Additional Mathematics Learning Guide | Topical-to-Full-Paper Progression, Prelim Calibration and Examination Transfer
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Secondary 4 Additional Mathematics Learning Guide | Topical-to-Full-Paper Progression, Prelim Calibration and Examination Transfer
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Secondary 4 Additional Mathematics Learning Guide | Trigonometric Functions, Identities and Equations
Browse every published Post
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How to Perform in PSLE | Learner’s Guide Vol 0024 | Mathematics: Choose the Method You Can Verify
25–37 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0021 | English: Trace the Cause Chain Before You Answer Why
19–28 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0021 | Secondary 4 Examination-Year Control: Revision, Stamina, Recovery and the Final Stretch
17–25 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0023 | English: Compare on the Same Basis Before You Write the Difference
24–36 minutes -
Advanced Mathematics Tutorials | Should Parents Sit In or Observe Mathematics Tuition?
42–63 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0020 | Science Quantitative Reasoning: Equations, Units, Graphs and Data
17–25 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0022 | Stop Checking When the Check Stops Producing New Information
25–38 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0020 | Answer Every Part Before You Combine Them
20–30 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0020 | Science Quantitative Reasoning: Equations, Units, Graphs and Data
17–25 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0024 | Science: Command Words — Describe, Explain, Predict, Suggest and Justify
19–29 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0021 | Science: Use What Stayed the Same to Test Your Explanation
25–38 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0023 | Mathematics: Mathematical Communication — Show the Method, Justify the Step, Interpret the Result
19–29 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0019 | Mathematics Statistics, Probability and Data Interpretation: Reasoning Under Uncertainty
17–25 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0020 | Mathematics: Reconstruct the Starting State From the Ending State
25–37 minutes -
Advanced Mathematics Tutorials | Mathematics Tuition the Day Before an Exam — Attend, Shorten, or Skip?
42–63 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0022 | English: Response Depth — How Much Is Enough?
20–30 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0020 | Science Quantitative Reasoning: Equations, Units, Graphs and Data-Based Conclusions
17–25 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0019 | English: Use Contrast Words to Find the Turning Point
20–30 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0021 | Recovery After Mistakes — Stop One Bad Question Becoming the Rest of the Paper
20–29 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0018 | Secure the Minimum Complete Answer Before You Add Detail
19–29 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0019 | Mathematics Statistics, Probability and Data Interpretation: From Calculation to Judgement
17–25 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0018 | English Listening and Oral Communication: Planned Response, Spoken Interaction and Real-Time Control
17–25 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0017 | Secondary 3 Integration: From Topic Mastery to Examination Transfer
17–25 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0016 | Science: Use a Counterexample to Challenge an Always-or-Never Claim
20–30 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0015 | Mathematics: Test the Method on a Small Case Before You Commit
21–31 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0014 | English: Resolve the Reference Before You Infer
22–32 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0017 | Science: Name What Was Actually Measured Before You Explain
19–29 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0016 | Mathematics: Use Units to Expose the Wrong Operation
20–31 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0020 | Science: Experimental Questions — Variables, Measurement Quality and Better Improvements
12–19 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0013 | Change an Answer Only When the Reason Changes
19–29 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0019 | Mathematics: Checking Systems — Estimate, Substitute, Reverse and Test
11–16 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0015 | English: When Two Answers Seem Plausible, Find the Decisive Evidence
19–29 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0014 | Use a Different Check for a Different Failure
21–32 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0018 | English: Answer Precision — Relevance, Completeness and Economy
11–17 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0017 | Examination Stamina: Protect Attention, Recover and Finish Strong
14–21 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0016 | Science Practical Investigations: Variables, Measurement, Uncertainty and Evaluation
11–16 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0015 | Mathematics Geometry, Trigonometry and Proof: From Diagrams to Justified Reasoning
9–14 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0014 | English Writing: Task Fulfilment, Register, Cohesion and Editing
10–14 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0013 | Secondary 2 Consolidation, Interleaving and Cumulative Review
10–15 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0012 | Science: Test the First Explanation Against an Alternative
19–28 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0011 | Mathematics: Name the Intermediate Quantity Before You Use It
18–27 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0012 | Science: Read a “No Change” Result Without Inventing a Cause
24–36 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0010 | English: Rephrase Without Changing the Meaning
19–28 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0011 | Mathematics: Estimate Before and After You Calculate
19–28 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0010 | English: Paraphrase Evidence Without Changing Meaning
19–28 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0009 | Classify the Error Before You Practise Again
20–29 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0009 | Use Confidence as a Signal, Not an Answer
20–30 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0016 | Science: Unfamiliar Contexts — Find the Familiar Science Inside
5–8 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0015 | Mathematics: Mixed-Topic Recognition — How to Know Which Method to Use
5–7 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0014 | English: Listening and Oral Communication in Real Time
5–7 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.
