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 2 Mathematics Learning Guide | Scaffolding & Guided Practice: Prompting, Fading Support & Independent Transfer
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Primary 2 Mathematics Learning Guide | Shape Composition & Decomposition: Semicircles, Quarter Circles, Grids, Lines, Curves & Flat Faces
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Primary 2 Mathematics Learning Guide | Shapes, Picture Graphs, Word Problems & Mathematical Models
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Primary 2 Mathematics Learning Guide | Time, Duration, Timelines & Schedule Reasoning
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Primary 2 Mathematics Learning Guide | Whole Numbers, Place Value, Addition & Subtraction
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Primary 2 Mathematics Learning Hub | Number Sense, Operations, Fractions, Measurement, Shapes, Data & Problem Solving
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Primary 2 Mathematics Practice Guide | Money, Measurement, Time, Geometry & Data: Applied Questions & Worked Solutions
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Primary 2 Mathematics Practice Guide | Multiplication, Division & Fractions: Fact Fluency, Equal Groups, Fraction Reasoning & Worked Solutions
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Primary 2 Mathematics Practice Guide | Numbers to 1000, Addition & Subtraction: Topical Questions, Mixed Practice & Worked Solutions
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Primary 2 Mathematics Practice Guide | Word Problems, Heuristics & Mixed Revision: Model Drawing, Non-Routine Problems & Worked Solutions
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Primary 2 Mathematics Sengkang | The Voyage of Water
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Primary 2 Mathematics Tuition Sengkang | Build Fluency, Models & Problem Solving
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Primary 2 Mathematics Tutor | Curie Series | From Number Sense to Relational Fluency
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Primary 2 Mathematics | When Fluency Becomes a Tool for Problem Solving | Darwin × Voyage
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Primary 2 Science Tutor | Curie Series | Evidence, Prediction and the Handover Into Formal Science
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Primary 2 Tuition Sengkang | From Supported Learning to Independent Foundations
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Primary 3 English Learning Guide | Author’s Purpose and Craft Workshop: Audience, Structure, Evidence and Language Choices
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Primary 3 English Learning Guide | Character Motivation, Emotion and Evidence in Reading: Inference, Change and Response
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Primary 3 English Learning Guide | Collaborative Discussion: Turn-Taking, Clarification, Building on Ideas and Respectful Disagreement
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Primary 3 English Learning Guide | Comma Precision Workshop: Series, Dates, Places, Introductory Elements, Direct Address and Compound Sentences
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Primary 3 English Learning Guide | Common and Proper Nouns + Capitalisation Workshop: Names, Places, Days, Months, Languages, Titles and Geographic Names
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Primary 3 English Learning Guide | Comparing Stories in a Series Workshop: Theme, Setting, Plot, Recurring Characters, Changed Circumstances and Evidence
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Primary 3 English Learning Guide | Comparing Two Texts: Similarities, Differences, Purpose and Evidence
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Primary 3 English Learning Guide | Comprehension Cloze: Cohesion, Context and Whole-Text Meaning
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Primary 3 English Learning Guide | Comprehension Question Types and Answer Precision
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Primary 3 English Learning Guide | Concrete and Abstract Nouns Workshop: Ideas, Qualities, Feelings, States, Word Formation and Clear Writing
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Primary 3 English Learning Guide | Consolidation and the Primary 4 Handover
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Primary 3 English Learning Guide | Context Clues Workshop: Definition, Restatement, Synonym, Antonym, Example and General Context
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Primary 3 English Learning Guide | Countable and Uncountable Nouns Workshop: Quantifiers, Measure Words and Precise Meaning
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Primary 3 English Learning Guide | Descriptive Writing: Observation, Sensory Detail, Precise Nouns, Verbs and Comparison
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Primary 3 English Learning Guide | Dialogue and Punctuation: Speech, Reporting Clauses, Voice and Meaning
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Primary 3 English Learning Guide | Email and Digital Message Writing: Purpose, Audience, Subject, Tone and Complete Information
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Primary 3 English Learning Guide | Error Analysis, Self-Correction, Retrieval and Transfer
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Primary 3 English Learning Guide | Explanatory Writing: How, Why, Cause, Process and Precision
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Primary 3 English Learning Guide | Fact, Opinion, Inference and Evidence
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Primary 3 English Learning Guide | Figurative and Idiomatic Meaning in Context: Simile, Metaphor, Personification and Idioms
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Primary 3 English Learning Guide | Grammar and Editing: Agreement, Tense, Pronouns, Connectors and Sentence Boundaries
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Primary 3 English Learning Guide | Homophones and Homographs Workshop: Context, Spelling, Multiple Meaning, Dictionary Checking and Editing
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Primary 3 English Learning Guide | Independent Reading: Book Choice, Response and Building a Reading Life
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Primary 3 English Learning Guide | Independent Study Routines for English: Retrieval, Spacing, Error Return, Transfer and Planning
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Primary 3 English Learning Guide | Information Synthesis Across Text and Visual Sources: Main Idea, Evidence and Integration
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Primary 3 English Learning Guide | Informational and Functional Writing: Purpose, Audience, Notes, Messages and Instructions
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Primary 3 English Learning Guide | Informational Text Structure Workshop: Description, Sequence, Cause–Effect, Compare–Contrast and Problem–Solution
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Primary 3 English Learning Guide | Listening Comprehension: Main Ideas, Details, Sequence and Change
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Primary 3 English Learning Guide | Main Idea and Supporting Details Workshop: Topic, Stated and Implied Main Ideas, Key Details and Summary
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Primary 3 English Learning Guide | Modal Verbs: Certainty, Possibility, Permission, Advice and Obligation
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Primary 3 English Learning Guide | Narrative Writing: Character, Choice, Consequence and Pacing
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Primary 3 English Learning Guide | Narrator and Point of View Workshop: First Person, Third Person, Knowledge, Perspective and Evidence
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Primary 3 English Learning Guide | Nonfiction and Informational Reading: Main Idea, Structure, Comparison and Evidence
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Primary 3 English Learning Guide | Nonfiction Text Features and Search Tools Workshop: Headings, Captions, Diagrams, Labels, Glossary, Index and Navigation
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.
