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 Learning Guide | Inputs, Outputs, Conservation & Material Tracking for PSLE
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Primary 6 Science Learning Guide | Integrated Multi-Concept Reasoning & Unfamiliar PSLE Setups
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Primary 6 Science Learning Guide | Interactions Within the Environment: Food Chains, Food Webs and Survival
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Primary 6 Science Learning Guide | Investigations, Variables, Fair Tests & Method
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Primary 6 Science Learning Guide | Life Cycles: Stage Order, Growth vs Reproduction, Comparisons & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Light: Sources, Reflection, Straight-Line Travel, Shadows & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Living Together: Interdependence, Competition, Shared Resources & Survival for PSLE
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Primary 6 Science Learning Guide | Magnets: Attraction vs Repulsion, Magnetic Materials, Poles, Distance & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Man’s Impact on the Environment: Conservation, Reforestation, Pollution, Resources & Global Warming for PSLE
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Primary 6 Science Learning Guide | Mass vs Weight, Gravitational Force, Motion & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Materials: Properties vs Uses, Strength, Waterproofness, Conductors, Insulators & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Matter, Water Cycle, Light & Heat for PSLE
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Primary 6 Science Learning Guide | Matter: Air Has Mass, Solids vs Liquids vs Gases, Shape, Volume, Compression & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | MCQ Distractors, Elimination & Error Patterns for PSLE
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Primary 6 Science Learning Guide | Measurement, Units, Resolution & Repeatability for PSLE
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Primary 6 Science Learning Guide | Mixed PSLE Science Practice Workshop with Original Worked Answers
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Primary 6 Science Learning Guide | Models, Assumptions, Limits & Scientific Claims for PSLE
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Primary 6 Science Learning Guide | Multi-Step Problem Solving, Constraints & Decision Paths for PSLE
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Primary 6 Science Learning Guide | Observation, Inference, Prediction & Conclusion for PSLE
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Primary 6 Science Learning Guide | Open-Ended Answer Construction, Completeness & Mark-Bearing Science for PSLE
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Primary 6 Science Learning Guide | Operational Definitions, Measurable Criteria & Classification Rules for PSLE
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Primary 6 Science Learning Guide | Photosynthesis: Energy, Matter, Evidence and Explanation
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Primary 6 Science Learning Guide | Plant Food vs Mineral Salts, Photosynthesis, Respiration & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Plant Transport, Digestion, Respiration & Circulation for PSLE
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Primary 6 Science Learning Guide | Plant Transport: Water vs Food-Carrying Tubes, Roots, Stems, Leaves, Transpiration & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Practical Planning, Data Recording & Conclusions for PSLE
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Primary 6 Science Learning Guide | Prediction, What-If Reasoning, Extrapolation & Transfer for PSLE
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Primary 6 Science Learning Guide | PSLE Questions, Explanations, Error Analysis & Revision
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Primary 6 Science Learning Guide | Question Deconstruction, Conditions & Constraints for PSLE
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Primary 6 Science Learning Guide | Rates, Time, Change & Comparative Reasoning for PSLE
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Primary 6 Science Learning Guide | Reproduction: Pollination vs Fertilisation, Seeds, Fruits, Dispersal, Fertilised Eggs & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Respiratory & Circulatory Systems: Oxygen, Carbon Dioxide, Heart, Pulse, Exercise & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Retrieval, Spaced Review, Interleaving & Long-Term Memory for PSLE
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Primary 6 Science Learning Guide | Safety, Risk Assessment & Responsible Investigation for PSLE
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Primary 6 Science Learning Guide | Sampling, Field Surveys, Populations & Ecological Evidence for PSLE
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Primary 6 Science Learning Guide | Scaling, Ratios, Proportional Thinking & Estimation for PSLE
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Primary 6 Science Learning Guide | Science Reading Comprehension, Dense Question Stems & Information Filtering for PSLE
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Primary 6 Science Learning Guide | Scientific Communication, Findings & Evidence Presentation for PSLE
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Primary 6 Science Learning Guide | Scientific Vocabulary, Precision & Answer Language for PSLE
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Primary 6 Science Learning Guide | Secondary Science Bridge, Independent Learning & Model Transition
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Primary 6 Science Learning Guide | Self-Explanation, Metacognitive Checking & Answer Verification for PSLE
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Primary 6 Science Learning Guide | Sequence, Cycles, Dependencies & System Pathways for PSLE
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Primary 6 Science Learning Guide | Sources vs Forms of Energy, Energy Conversion & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Testable Questions, Hypotheses & Investigation Design for PSLE
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Primary 6 Science Learning Guide | Water Cycle: Clouds vs Water Vapour, Evaporation, Condensation, Transpiration & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | What-If Changes, System Failure & Counterfactual Reasoning for PSLE
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Primary 6 Science Learning Hub | Concepts, Inquiry, Evidence & PSLE Readiness
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Primary 6 Science Punggol | PSLE Reconstruction & Examination Craft
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Primary 6 Science Sengkang | The Voyage of Water
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Primary 6 Science Tuition Sengkang | 2026 PSLE Science & Scientific Reasoning
Browse every published Post
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How to Learn Respiration and Gas Exchange: From Breathing to Cellular Bioenergetics
2–3 minutes -
How to Learn Spectroscopy: From Colour and Spectral Lines to Molecular Fingerprints and Stellar Physics
2–3 minutes -
How to Learn Reproduction and Development: From Life Cycles to Embryology and Developmental Biology
2–3 minutes -
How to Learn Chemical Bonding and Molecular Structure: From Attractions to Quantum Models and Materials
2–3 minutes -
How to Learn the Nervous System and Neural Signalling: From Reflexes to Neural Circuits and Coding
2–4 minutes -
How to Learn Rocks, Minerals and the Rock Cycle: From Earth Materials to Deep Time and Petrology
2–3 minutes -
How to Learn Microorganisms, Infection and Immunity: From Invisible Life to Host–Pathogen Systems
2–4 minutes -
How to Learn Enzymes and Metabolism: From Biological Catalysts to Metabolic Networks and Flux
2–3 minutes -
How to Learn Diffusion, Osmosis and Membrane Transport: From Random Molecular Motion to Electrochemical Gradients
2–3 minutes -
How to Learn Homeostasis and Feedback: From Body Balance to Control Systems and Systems Physiology
3–4 minutes -
How to Learn Gravity, Orbits and the Solar System: From Falling Objects to Orbital Mechanics
3–4 minutes -
How to Learn Radioactivity and Nuclear Decay: From Unstable Nuclei to Half-Life, Risk and Detection
2–3 minutes -
How to Learn Evolution and Natural Selection: From Variation to Population Genetics and Phylogeny
2–3 minutes -
How to Learn Pressure and Fluids: From Everyday Forces to Fluid Dynamics
3–4 minutes -
How to Learn Plate Tectonics and Earth Systems: From Moving Plates to a Dynamic Planet
3–4 minutes -
How to Learn Magnetism and Electromagnetism: From Magnets to Fields, Motors and Induction
3–4 minutes -
How to Learn Acids, Bases and pH: From Indicators to Equilibria and Buffer Systems
2–4 minutes -
How to Learn Weather and Climate: From Daily Observations to Atmospheric Science
3–5 minutes -
How to Learn Genetics and Inheritance: From Traits to Genes, Genomes and Variation
3–4 minutes -
How to Learn Photosynthesis and Respiration: From Plant Food to Cellular Energy Networks
3–4 minutes -
How to Learn Heat and Temperature: From Everyday Warmth to Thermal Physics
4–5 minutes -
How to Learn Linear Programming Algorithms: Feasible Regions, Simplex, Duality and Numerical Reality
7–10 minutes -
How to Learn the Fast Fourier Transform: DFT Structure, Divide-and-Conquer, Butterflies and Convolution
5–8 minutes -
How to Learn Bipartite Matching Algorithms: Augmenting Paths, Hopcroft–Karp and Assignment
5–8 minutes -
How to Learn Data Compression Algorithms: Entropy, Huffman Coding, Lempel–Ziv and Real-World Trade-Offs
5–8 minutes -
How to Learn Cache-Efficient Algorithms: Locality, I/O Complexity, Blocking and Cache-Oblivious Design
6–9 minutes -
How to Learn Parameterized Algorithms: FPT, Branching, Kernelization and Choosing the Right Parameter
6–9 minutes -
How to Learn NP-Completeness and Reductions: Certificates, Polynomial Time, Hardness and Proof Design
6–9 minutes -
How to Learn Number-Theoretic Algorithms: GCD, Extended Euclid, Modular Exponentiation and Primality
6–8 minutes -
How to Learn Parallel Algorithms: Work, Span, Reduce, Scan and When More Processors Actually Help
5–8 minutes -
How to Learn Suffix Arrays and LCP Arrays: String Indexing, Binary Search and Repeated Structure
5–7 minutes -
How to Learn Computational Geometry Algorithms: Orientation, Convex Hulls, Sweep Lines and Robust Predicates
5–7 minutes -
How to Learn Bloom Filters: Probabilistic Membership, False Positives and Space–Accuracy Trade-Offs
5–7 minutes -
How to Learn Cells and Living Systems: Beginner to Advanced
5–8 minutes -
How to Learn Forces and Motion: Beginner to Advanced
5–7 minutes -
How to Learn Matter and Particles: Beginner to Advanced
4–6 minutes -
How to Learn Energy in Science: Beginner to Advanced
4–7 minutes -
How to Learn Streaming Algorithms: One Pass, Small Memory and Approximate Answers
5–8 minutes -
How to Learn Online Algorithms: Decisions Without Future Knowledge and Competitive Analysis
5–8 minutes -
How to Learn Approximation Algorithms: Near-Optimal Solutions, Approximation Ratios and Proofs
5–7 minutes -
How to Learn Algorithm Correctness Proofs: Preconditions, Loop Invariants, Induction and Termination
5–7 minutes -
How to Learn Amortized Analysis: Aggregate, Accounting and Potential Methods
5–7 minutes -
How to Learn Randomized Algorithms: Random Choices, Expected Cost, Las Vegas and Monte Carlo Guarantees
4–7 minutes -
How to Learn Strongly Connected Components: Mutual Reachability, Kosaraju, Tarjan and Condensation DAGs
5–7 minutes -
How to Learn Selection Algorithms: Quickselect, Order Statistics and Median-of-Medians
5–7 minutes -
How to Learn Network Flow Algorithms: Residual Graphs, Augmenting Paths and Max-Flow Min-Cut
5–7 minutes -
How to Learn Minimum Spanning Trees: Cut Property, Kruskal, Prim and Proof of Choice
4–7 minutes -
How to Learn Topological Sorting: DAGs, Indegrees, Kahn’s Algorithm and Cycle Detection
4–6 minutes -
How to Learn Tries: Prefix Trees, Search, Autocomplete and Memory Trade-Offs
4–7 minutes -
How to Learn Backtracking Algorithms: Choose, Explore, Undo and Prune
7–10 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.
