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 5 English Learning Guide | Reading Tables, Charts, Timetables and Maps: Labels, Units, Comparison and Evidence
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Primary 5 English Learning Guide | Reading Viewpoint and Bias: Perspective, Language, Selection and Evidence
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Primary 5 English Learning Guide | Reading, Comprehension, Inference and Evidence
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Primary 5 English Learning Guide | Reference Tools: Dictionary, Thesaurus, Glossary, Index and Alphabetical Order
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Primary 5 English Learning Guide | Research and Information Literacy: Questions, Sources, Keywords, Notes and Synthesis
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Primary 5 English Learning Guide | Sentence Combining and Cohesion: Connectors, Pronouns, Reference and Paragraph Flow
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Primary 5 English Learning Guide | Sentence Types and Punctuation: Statements, Questions, Commands, Exclamations, Capitals, Commas and Apostrophes
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Primary 5 English Learning Guide | Situational Writing: Content Points, Audience and Tone
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Primary 5 English Learning Guide | Spelling and Word Study: Morphology, Prefixes, Suffixes, Word Families and Dictation
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Primary 5 English Learning Guide | Summarising and Note-Making: Main Ideas, Keywords, Paraphrase and Recall
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Primary 5 English Learning Guide | Synthesis and Transformation: Meaning Preservation
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Primary 5 English Learning Guide | Tense and Time Control: Past, Present, Future, Progressive, Perfect and Consistency
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Primary 5 English Learning Guide | The PSLE Runway
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Primary 5 English Learning Guide | Vocabulary in Context, Collocation and Vocabulary Cloze
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Primary 5 English Learning Guide | Vocabulary, Grammar, Synthesis, Cloze and Editing
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Primary 5 English Learning Guide | Whole-Text Revision: Purpose, Cohesion, Consistency, Repetition, Variety and Proofreading
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Primary 5 English Learning Guide | Word Meaning Relationships: Synonyms, Antonyms, Multiple Meanings, Shades and Collocation
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Primary 5 English Learning Guide | Writing for Purpose, Audience, Situational Writing and Continuous Writing
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Primary 5 English Learning Overview | The PSLE Runway and Weekly Learning Cycle
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Primary 5 English Sengkang | The Voyage of Water
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Primary 5 English Sengkang | Why 3-Pax Helps the PSLE Runway
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Primary 5 English Tuition Sengkang | PSLE English Preparation Starts Here
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Primary 5 English Tutor | Curie Series | Holding Meaning Under Greater Load
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Primary 5 English | Why the PSLE Runway Starts Here | Darwin × Voyage
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Primary 5 Mathematics Examination Guide | Paper 1, Paper 2, Calculator Discipline & Long-Answer Strategy
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Primary 5 Mathematics Learning Guide | Act It Out: Simulation, State Tracking, Movement & Process Problems
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Primary 5 Mathematics Learning Guide | Angle Reasoning: Straight Lines, Vertically Opposite Angles & Triangles
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Primary 5 Mathematics Learning Guide | Angles, Triangles, Quadrilaterals, Area & Volume
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Primary 5 Mathematics Learning Guide | Assumption Method, Fixed Totals, Equalisation & Difference Reasoning
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Primary 5 Mathematics Learning Guide | Before–After Models, Change Unknowns & Working Backwards
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Primary 5 Mathematics Learning Guide | Comparison Bar Models, Difference & Multiplicative Comparison
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Primary 5 Mathematics Learning Guide | Constant Total, Constant Difference & Constant Single-Subject Problems
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Primary 5 Mathematics Learning Guide | Cuboids, Volume, Unit Cubes & Water-Level Problems
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Primary 5 Mathematics Learning Guide | Data, Tables, Bar Graphs, Line Graphs & Interpretation
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Primary 5 Mathematics Learning Guide | Diagnostics, Mastery Map & Primary 6 Transition
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Primary 5 Mathematics Learning Guide | Equal Stage Method, Before–After Equalisation & Same-State Anchors
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Primary 5 Mathematics Learning Guide | Estimation, Calculator Control & Answer Verification
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Primary 5 Mathematics Learning Guide | Excess & Shortage, Gap & Difference, Distribution Plans
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Primary 5 Mathematics Learning Guide | Find a Pattern: Repetition, Recursive Change, Generalisation & Invariants
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Primary 5 Mathematics Learning Guide | Fraction Word Problems, Reference Wholes & Unknown Parts
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Primary 5 Mathematics Learning Guide | Fractions, Decimals & Percentage
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Primary 5 Mathematics Learning Guide | Grouping Method, Equal Groups, Quotient–Remainder & Whole-Object Constraints
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Primary 5 Mathematics Learning Guide | Guess, Check, Improve: Intelligent Trial, Bounds & Systematic Refinement
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Primary 5 Mathematics Learning Guide | Internal & External Transfer Problems, Before–After Models & Conservation
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Primary 5 Mathematics Learning Guide | Logical Deduction & Elimination: Constraints, Contradictions, Impossible Cases & Proof by Exclusion
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Primary 5 Mathematics Learning Guide | Mathematical Communication, Working, Notation & Explanation
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Primary 5 Mathematics Learning Guide | Mathematical Modelling: Real Situations, Assumptions & Returning to Context
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Primary 5 Mathematics Learning Guide | Measurement, Units, Conversion, Time & Quantitative Reasoning
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Primary 5 Mathematics Learning Guide | Metacognition, Self-Monitoring, Strategy Control & Error Recovery
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Primary 5 Mathematics Learning Guide | Mixed Practice, Error Analysis & PSLE Runway
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.
