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 the Mechanical Behaviour of Materials: From Stress–Strain to Fracture and Materials Selection
6–9 minutes -
How to Learn Quantum Measurement, Superposition and Tunnelling: From Experiments to Quantum-State Reasoning
6–8 minutes -
How to Learn Protein Folding and Proteostasis: From Amino-Acid Sequence to Cellular Quality Control
7–10 minutes -
How to Learn Garbage-Collection Algorithms: Reachability, Mark–Sweep, Generations, Barriers and Concurrent GC
11–16 minutes -
How to Learn Model-Checking Algorithms: State Spaces, Temporal Logic, BDDs, SAT and Counterexamples
10–15 minutes -
How to Learn Dynamic Graph Algorithms: Updates, Connectivity, Dynamic Trees and Amortized Trade-Offs
9–13 minutes -
How to Learn Mixed-Integer Programming Algorithms: Relaxations, Branch-and-Bound, Cutting Planes and Branch-and-Cut
10–14 minutes -
How to Learn Clustering Algorithms: k-Means, Hierarchical Clustering, DBSCAN and Spectral Methods
8–12 minutes -
How to Learn Error-Correcting Code Algorithms: Hamming Distance, Syndromes, Reed–Solomon and Iterative Decoding
7–10 minutes -
How to Learn Markov Chain Monte Carlo Algorithms: Metropolis–Hastings, Gibbs Sampling, HMC and Convergence Diagnostics
7–11 minutes -
How to Learn Numerical Linear Algebra Algorithms: Gaussian Elimination, LU, QR, SVD and Conditioning
8–11 minutes -
How to Learn Submodular Optimisation Algorithms: Diminishing Returns, Greedy Guarantees and Constraint-Aware Selection
7–11 minutes -
How to Learn Algorithmic Game Theory: Best Responses, Nash Equilibria, Regret and Mechanism Design
7–11 minutes -
How to Learn Succinct Data Structures: Bit Vectors, Rank/Select, Wavelet Trees and Space–Time Trade-Offs
7–11 minutes -
How to Learn Nearest-Neighbour Search Algorithms: k-d Trees, LSH, HNSW and Recall–Latency Trade-Offs
8–12 minutes -
How to Learn Persistent Data Structures: Structural Sharing, Path Copying, Versioned Trees and Persistence Trade-Offs
8–11 minutes -
How to Learn Sketching Algorithms: Count-Min Sketch, HyperLogLog, Error Bounds and Mergeable Summaries
7–10 minutes -
How to Learn Constraint Programming: Variables, Domains, Propagation, Arc Consistency and Search
7–10 minutes -
How to Learn Concurrent Algorithms: Linearizability, Compare-and-Swap, Lock-Free Progress and Memory Reclamation
7–11 minutes -
How to Learn Semiconductors and Transistors: From Energy Bands to Modern Electronics
9–13 minutes -
How to Learn Microscopy and Scientific Imaging: From Magnification to Super-Resolution and Image Evidence
9–13 minutes -
How to Learn DNA Replication and Repair: From Semiconservative Copying to Genome Stability
8–11 minutes -
How to Learn Skeletal Muscle and Human Biomechanics: From Muscle Contraction to Movement Analysis
7–11 minutes -
How to Learn Oscillations, Resonance and Simple Harmonic Motion: From Swings to Modal Analysis
8–12 minutes -
How to Learn Chromatography and Chemical Separation: From Paper Spots to HPLC and Analytical Chemistry
8–12 minutes -
How to Learn Atomic Structure and the Periodic Table: From Protons and Electrons to Orbitals and Periodicity
7–11 minutes -
How to Learn Kidney Function, Osmoregulation and the Nephron: From Filtration to Renal Physiology
7–11 minutes -
How to Learn Distributed Algorithms: Logical Clocks, Leader Election, Consensus and Failure Models
8–12 minutes -
How to Learn Graph Coloring Algorithms: Greedy Ordering, DSATUR, Backtracking and Chromatic Number
6–10 minutes -
How to Learn Parsing Algorithms: Grammars, Recursive Descent, LL/LR Parsing and Abstract Syntax Trees
7–10 minutes -
How to Learn B+ Tree Algorithms: Pages, Branching Factor, Splits, Merges and Database Indexes
8–11 minutes -
How to Learn Numerical Optimisation Algorithms: Gradient Descent, Newton Methods, Line Search and Convergence
7–11 minutes -
How to Learn Game-Search Algorithms: Minimax, Alpha–Beta Pruning, Evaluation Functions and Monte Carlo Tree Search
7–10 minutes -
How to Learn SAT-Solving Algorithms: DPLL, Unit Propagation, Clause Learning and Modern CDCL
7–10 minutes -
How to Learn Range-Query Algorithms: Fenwick Trees, Segment Trees, Lazy Propagation and Choosing the Right Structure
7–11 minutes -
How to Learn Soil Science and Nutrient Cycling: From Soil Particles to Living Biogeochemical Systems
3–4 minutes -
How to Learn Seismology and Earthquake Waves: From Ground Shaking to Imaging Earth’s Interior
3–4 minutes -
How to Learn the Cell Cycle, Mitosis and Growth Control: From Cell Division to Checkpoints and Cancer Biology
2–3 minutes -
How to Learn Thermodynamics and Entropy: From Heat and Work to the Direction of Natural Processes
3–4 minutes -
How to Learn Ocean Surface Currents, Upwelling and Gyres: From Wind to Marine Productivity
2–3 minutes -
How to Learn Solutions, Solubility and Crystallisation: From Dissolving to Phase Formation
2–3 minutes -
How to Learn Rotational Motion and Angular Momentum: From Turning Forces to Rigid-Body Dynamics
2–3 minutes -
How to Learn the Endocrine System and Hormonal Signalling: From Glands to Dynamic Control Networks
2–3 minutes -
How to Learn Stars, Fusion and Stellar Evolution: From Starlight to the Life Cycles of Stars
2–3 minutes -
How to Learn Gene Expression and Protein Synthesis: From DNA Information to Cellular Regulation
2–3 minutes -
How to Learn Organic Chemistry and Carbon Compounds: From Functional Groups to Reaction Mechanisms
2–3 minutes -
How to Learn Momentum, Impulse and Collisions: From Moving Objects to Conservation Laws
2–3 minutes -
How to Learn Electrochemistry and Batteries: From Redox Reactions to Cell Potentials and Energy Storage
2–3 minutes -
How to Learn Plant Transport and Transpiration: From Roots and Xylem to Plant Hydraulics
2–3 minutes -
How to Learn Blood Circulation and Oxygen Transport: From Heart Loops to Hemodynamics
2–3 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.
