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 6 Science Tuition | Careless Mistakes, Timing and Examination Control
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Primary 6 Science Tuition | For Beginners | Master Primary 6 Science Tuition for Beginners Today
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Primary 6 Science Tuition | Graphs, Tables and Data Interpretation for PSLE
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Primary 6 Science Tuition | How Do Adaptations Help Living Things Survive?
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Primary 6 Science Tuition | How Does Conservation Protect Ecosystems?
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Primary 6 Science Tuition | How Does Energy Change Form in Everyday Devices?
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Primary 6 Science Tuition | How Does Pollution Change a Food Web?
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Primary 6 Science Tuition | How to Answer Open-Ended Questions for PSLE with eduKate Sengkang
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Primary 6 Science Tuition | How to Explain Food Web Population Changes
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Primary 6 Science Tuition | What Happens When a Habitat Is Destroyed?
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Primary 6 Science Tuition | What Happens When Forces Are Balanced or Unbalanced?
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Primary 6 Science Tuition | Why Do Living Things Compete for Food, Water, Light and Space?
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Primary 6 Science Tuition | Why Do Objects Fall? Gravity, Weight and Motion
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Primary 6 Science Tuition | Why Do Rough Surfaces Create More Friction?
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Primary 6 Science Tuition | Why Does a Bouncing Ball Lose Height?
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Primary 6 Science Tuition | Why Does a Stretched Spring Return? Elastic Spring Force
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Primary 6 Science Tuition | Why Is the Sun the Main Source of Energy in Food Chains?
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Primary 6 Science Tutor | Curie Series | Energy, Forces, Environment and PSLE Integration
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Primary 6 Science | Reconstruct the World Before You Answer | Darwin × Voyage
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Primary 6 Tuition Sengkang | PSLE Readiness, Exam Control & the Secondary Transition
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Primary English Learning Hub | Primary 1–6 English Guides
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Primary English Sengkang | Which Part Is Actually Weak?
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Primary English Tuition Punggol | P1–P6: Find Your Child’s Stage
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Primary English Tuition Sengkang | P1–P6 Language Capability Map
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Primary Mathematics Punggol | Local Entry to the P1–P6 Math System
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Primary Mathematics Sengkang | Catch Up, Keep Up or Move Ahead?
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Primary Mathematics Sengkang | The P1–P6 Capability Map
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Primary Mathematics Success | 7 Signs the Learning System Is Actually Improving
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Primary Mathematics to Secondary 1 | Why the Learning Method Must Evolve | Darwin × Voyage
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Primary Mathematics Tuition Punggol | P1–P6: Foundations to PSLE
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Primary Science Sengkang | 8 Capabilities Behind Strong Science
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Primary Science Tuition Punggol | P3–P6: Observe → Relate → Systems → Reconstruct
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Primary Science Tuition Sengkang | Managing Education
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Primary Science Tuition Sengkang | P3–P6: Observe → Relate → Systems → Reconstruct
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Primary Science Tuition Sengkang | The Next Clear Step
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Primary Science | Complete P1–P6 and PSLE Science Guide
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Primary Tuition Sengkang | P1–P6 Learning Progression, Subjects & Parent Guide
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Professional Adulthood Tutor | Curie Series | From Competence to Judgement
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Professional Practice & Standards Tutor | Curie Series | Learning to Work Within Standards
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Prompt Dependence | Marie Curie Series | When Correct Work Is Not Yet Independent
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PSLE English 2026 | What the Examination Requires Students to Do
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PSLE English AL1 | Why Ten Tips Are Not Enough | Voyage to Examination Craft
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PSLE English Preparation | The Intervention Window Gets Smaller
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PSLE English Sengkang | The Voyage of Water — Meaning Under Uncertainty
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PSLE English Sengkang | Why 3-Pax Helps Mark Conversion
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PSLE English Tuition Centre Sengkang | Diagnostic Checklist
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PSLE English Tuition Sengkang | What to Repair Before More Papers
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PSLE English | From Language Capability to Examination Craft
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PSLE Exam Day Routine: Sleep, Food, Stationery, the First Five Minutes
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PSLE Learning Guide | English, Mathematics & Science
Browse every published Post
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How to Learn Coordination Chemistry and Transition Metals: From Ligands and Crystal Fields to Colour, Magnetism and Reactivity
9–13 minutes -
How to Learn Aerosol Science and Atmospheric Particles: From PM2.5 to Clouds, Climate and Satellite Retrievals
8–13 minutes -
How to Learn Glaciology and Ice-Sheet Dynamics: From Snowfall and Ice Flow to Grounding Lines and Sea-Level Change
8–12 minutes -
How to Learn the Ubiquitin–Proteasome System and Protein Degradation: From Ubiquitin Tags to Proteasomal Quality Control and Targeted Degradation
10–15 minutes -
Parametric Search | Optimization by Decision Procedures Learning Guide
7–11 minutes -
How to Learn Ferroelectricity and Piezoelectric Materials: From Crystal Symmetry to Domains, Sensors and Memory
8–12 minutes -
How to Learn SMAWK: Totally Monotone Matrices, Row Minima, Reduce–Interpolate Recursion and Linear-Time DP Optimization
6–10 minutes -
How to Learn Manacher’s Algorithm: Palindrome Radii, Mirror Symmetry, Rightmost Boundaries and Linear-Time String Search
6–9 minutes -
How to Learn Meet-in-the-Middle Algorithms: Split Search Spaces, Subset Sum, Complement Matching and Time–Space Trade-Offs
6–9 minutes -
How to Learn DFA Minimization Algorithms: State Equivalence, Partition Refinement, Moore, Hopcroft and Myhill–Nerode
7–10 minutes -
How to Learn Fast Integer Multiplication: Schoolbook, Karatsuba, Toom–Cook, FFT and Algorithm Thresholds
6–9 minutes -
How to Learn Minimal Perfect Hashing Algorithms: Static Key Sets, Collision-Free Indexes, RecSplit, PTHash and PtrHash
7–11 minutes -
How to Learn Fibonacci Heap Algorithms: Lazy Consolidation, Decrease-Key, Cascading Cuts and Amortized Guarantees
7–10 minutes -
How to Learn Membrane Biophysics and Lipid Bilayers: From Self-Assembly to Curvature, Domains and Phase Separation
8–13 minutes -
How to Learn Metamaterials, Metasurfaces and Wave Engineering: From Effective Media to Metalenses and Programmable Surfaces
7–10 minutes -
How to Learn High-Pressure Physics and Planetary Materials: From Diamond Anvil Cells to Deep-Earth and Giant-Planet Matter
7–11 minutes -
How to Learn Nonlinear Dynamics, Chaos and Complex Systems: From Phase Space to Bifurcations and Predictability
7–11 minutes -
How to Learn Biomineralization and Biological Materials: From Shells and Bone to Nacre, Teeth and Magnetic Crystals
7–10 minutes -
How to Learn Statistical Mechanics and Ensembles: From Microstates and Entropy to Nonequilibrium Fluctuations
6–10 minutes -
How to Learn Solar Cells and Photovoltaics: From Photons and p–n Junctions to Tandem Devices and Grid Electricity
7–11 minutes -
How to Learn Biofilms and Microbial Communities: From Surface Attachment to Quorum Sensing and Spatial Ecology
7–10 minutes -
How to Learn X-Ray Crystallography and Structural Biology: From Diffraction Patterns to Atomic Models and MicroED
7–10 minutes -
How to Learn Paleoclimatology and Climate Proxies: From Ice Cores and Sediments to Deep-Time Climate Reconstruction
7–11 minutes -
How to Learn Neutrinos and Particle Detection: From Weak Interactions to Oscillations, IceCube and JUNO
6–9 minutes -
How to Learn Cryogenics and Low-Temperature Physics: From Gas Liquefaction to Millikelvin Quantum Systems
8–11 minutes -
How to Learn Vacuum Science and Thin-Film Deposition: From Mean Free Path to PVD, CVD and Atomic Layer Deposition
7–11 minutes -
How to Learn Ultrasound and Acoustic Imaging: From Sound Waves to Doppler, Beamforming and Super-Resolution
7–10 minutes -
How to Learn Photochemistry and Excited-State Molecular Dynamics: From Photon Absorption to Ultrafast Reaction Pathways
7–11 minutes -
How to Learn RANSAC Algorithms: Minimal Samples, Consensus Sets, Outliers, Stopping Probability and Robust Model Fitting
6–8 minutes -
How to Learn R-Tree Spatial Index Algorithms: Bounding Rectangles, Overlap, Splits, R*-Trees and Spatial Databases
5–8 minutes -
How to Learn Fractional Cascading: Repeated Binary Search, Catalog Links, Predecessor Queries and Space–Time Trade-Offs
5–8 minutes -
How to Learn Heavy-Light Decomposition Algorithms: Heavy Edges, Tree Flattening, Path Queries and Segment Trees
5–8 minutes -
How to Learn Rheology and Complex Fluids: From Viscosity to Viscoelasticity, Yield Stress and Flow Curves
6–9 minutes -
How to Learn Cycle-Finding Algorithms: Floyd’s Tortoise–Hare, Brent’s Method, Functional Graphs and Constant Memory
7–11 minutes -
How to Learn Exact-Cover Algorithms: Algorithm X, Dancing Links, Constraint Matrices and Reversible Backtracking
7–10 minutes -
How to Learn Global Minimum-Cut Algorithms: Random Contraction, Stoer–Wagner, Failure Probability and Exact Cuts
8–11 minutes -
How to Learn Treaps: Randomized Priorities, Split–Merge Operations, Expected Balance and Sequence Design
8–11 minutes -
How to Learn Exact-Cover Algorithms: Algorithm X, Constraint Matrices, Dancing Links and Backtracking Heuristics
6–10 minutes -
How to Learn Integer Predecessor Algorithms: van Emde Boas Trees, X-Fast Tries, Y-Fast Tries and Word-RAM Trade-Offs
6–9 minutes -
How to Learn Suffix Automata: End-Position States, Suffix Links, Cloning and Linear-Time String Indexing
6–10 minutes -
How to Learn Modern Open-Addressing Hash Tables: Linear Probing, Robin Hood, Cuckoo Hashing and Swiss-Table Ideas
7–10 minutes -
How to Learn Real-Time Scheduling Algorithms: Rate Monotonic, EDF, Schedulability Tests and Deadline Guarantees
6–9 minutes -
How to Learn Cartesian Trees and Static RMQ: Heap–Order Structure, Monotonic Construction, LCA Reduction and O(1) Queries
5–8 minutes -
How to Learn Monotonic Stack and Deque Algorithms: Dominance, Next-Greater Queries, Sliding Windows and Amortized O(n)
5–8 minutes -
Treap Algorithms | Split, Merge & Randomized BST Learning Guide
5–8 minutes -
How to Learn X-Ray Diffraction and Crystallography: From Bragg Peaks to Reciprocal Space and Crystal Structure
12–18 minutes -
How to Learn Corrosion and Materials Degradation: From Electrochemical Cells to Passivation, Pitting and Failure Analysis
11–17 minutes -
How to Learn Autophagy and Lysosomal Recycling: From Autophagosomes to Selective Quality Control and Cellular Flux
9–14 minutes -
How to Learn RNA Processing and Alternative Splicing: From Pre-mRNA to Isoforms, Surveillance and Long-Read Transcriptomics
9–13 minutes -
How to Learn Rivers, Sediment Transport and Fluvial Geomorphology: From Flowing Water to Channel Evolution
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.
