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
2756 results found
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Primary 3 English Learning Guide | Opinion Writing: Claim, Reasons, Examples, Audience and Revision
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Primary 3 English Learning Guide | Oral Communication: Reading Aloud, Conversation, Idea Development and Recovery
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Primary 3 English Learning Guide | Paragraph Function and Logical Connections Workshop: Introduction, Explanation, Evidence, Sequence, Cause, Comparison and Transitions
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Primary 3 English Learning Guide | Parts of Speech in Context: Nouns, Verbs, Adjectives, Adverbs and Prepositions
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Primary 3 English Learning Guide | Personal Recount Writing: Chronology, Significant Moments, Reflection and Voice
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Primary 3 English Learning Guide | Phrasal Verbs and Common Multi-Word Expressions: Context, Collocation and Register
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Primary 3 English Learning Guide | Poetry and Literary Language: Imagery, Sound, Character, Theme and Response
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Primary 3 English Learning Guide | Possessive Nouns and Apostrophes Workshop: Singular and Plural Ownership, Association, Contractions and Editing
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Primary 3 English Learning Guide | Prefixes, Suffixes and Morphology Workshop: Base Words, Meaning, Word Families, Spelling and Context
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Primary 3 English Learning Guide | Prepositions Workshop: Time, Place, Movement and Precise Instructions
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Primary 3 English Learning Guide | Presentation Skills: Planning, Signposting, Voice, Visuals, Questions and Recovery
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Primary 3 English Learning Guide | Procedural Writing: Goal, Materials, Sequence, Conditions and Testing
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Primary 3 English Learning Guide | Pronouns, Articles and Reference Chains: Clarity, Cohesion and Meaning
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Primary 3 English Learning Guide | Question Generation and Metacognitive Reading: Prediction, Monitoring and Repair
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Primary 3 English Learning Guide | Questions and Negatives Workshop: Do, Does, Did, Be and Meaning-Preserving Rewrites
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Primary 3 English Learning Guide | Reading Fluency, Phrasing, Silent Reading Stamina and Strategic Rereading
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Primary 3 English Learning Guide | Reading Multi-Step Instructions and Task Language: Sequence, Conditions, Constraints and Checking
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Primary 3 English Learning Guide | Reading Tables, Charts, Timetables and Maps: Labels, Units, Comparison and Evidence
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Primary 3 English Learning Guide | Reading Viewpoint and Bias: Perspective, Language, Selection and Evidence
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Primary 3 English Learning Guide | Reading, Comprehension, Inference and Evidence Foundations
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Primary 3 English Learning Guide | Reference Tools: Dictionary, Thesaurus, Glossary, Index and Alphabetical Order
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Primary 3 English Learning Guide | Regular, Irregular and Collective Nouns Workshop: Plural Forms, Number Meaning, Determiners and Agreement
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Primary 3 English Learning Guide | Research and Information Literacy: Questions, Sources, Keywords, Notes and Simple Synthesis
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Primary 3 English Learning Guide | Sentence Combining and Cohesion: Connectors, Pronouns, Reference and Paragraph Flow
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Primary 3 English Learning Guide | Sentence Expansion: Phrases, Clauses, Reasons, Conditions, Time and Contrast
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Primary 3 English Learning Guide | Sentence Types and Punctuation: Statements, Questions, Commands, Exclamations, Capitals, Commas and Apostrophes
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Primary 3 English Learning Guide | Spelling and Word Study: Syllables, Prefixes, Suffixes, Word Families and Dictation
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Primary 3 English Learning Guide | Story Elements and Plot Workshop: Setting, Character Goal, Problem, Event Chain, Turning Point, Consequence and Resolution
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Primary 3 English Learning Guide | Subject and Predicate Workshop: Sentence Core, Complete and Simple Subjects, Compound Parts and Editing
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Primary 3 English Learning Guide | Subject, Object, Possessive and Reflexive Pronouns Workshop: Case, Sentence Roles and Clear Reference
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Primary 3 English Learning Guide | Subject–Verb Agreement Workshop: Head Nouns, Distractors and Independent Checking
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Primary 3 English Learning Guide | Summarising and Note-Making: Main Ideas, Keywords, Paraphrase and Recall
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Primary 3 English Learning Guide | Tense and Time Control: Past, Present, Future, Sequence and Consistency
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Primary 3 English Learning Guide | The Primary 3 Reset: From Learning to Read to Reading to Learn
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Primary 3 English Learning Guide | Theme and Central Message Workshop: Topic, Character Choice, Consequence and Evidence
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Primary 3 English Learning Guide | Verb Forms and Helping Verbs Workshop: Be, Have, Do, Regular and Irregular Forms, Questions and Negatives
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Primary 3 English Learning Guide | Visual and Multimodal Text: Purpose, Audience, Layout and Evidence
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Primary 3 English Learning Guide | Vocabulary in Context, Word Families and Cloze Meaning
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Primary 3 English Learning Guide | Vocabulary, Grammar, Listening and Oral Control
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Primary 3 English Learning Guide | Whole-Text Revision: Purpose, Cohesion, Consistency, Repetition, Variety and Proofreading
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Primary 3 English Learning Guide | Word Meaning Relationships: Synonyms, Antonyms, Multiple Meanings, Shades and Collocation
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Primary 3 English Learning Guide | Writing: Sentences, Paragraphs, Composition and Revision
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Primary 3 English Sengkang | The Voyage of Water
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Primary 3 English Tuition Sengkang | Comprehension, Grammar & Composition
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Primary 3 English Tutor | Curie Series | When Reading Becomes a Tool for Learning
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Primary 3 English | When English Stops Being Separate Skills | Darwin × Voyage
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Primary 3 Mathematics Learning Guide | Adding & Subtracting Related Fractions Within One Whole, Equivalent Denominators & Visual Models
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Primary 3 Mathematics Learning Guide | Addition, Subtraction, Multiplication & Division Word-Problem Structures
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Primary 3 Mathematics Learning Guide | Angles Smaller/Greater Than a Right Angle, Quarter-Turn Benchmarks, Rotation & Classification
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Primary 3 Mathematics Learning Guide | Angles, Right Angles, Parallel & Perpendicular Lines
Browse every published Post
3746 results found
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How to Learn Krylov-Subspace Algorithms: Conjugate Gradient, GMRES, Residuals and Preconditioning
7–11 minutes -
How to Learn Numerical ODE Solver Algorithms: Euler, Runge–Kutta, Adaptive Step Size, Stiffness and BDF
9–13 minutes -
How to Learn Graph Partitioning Algorithms: Edge Cuts, Kernighan–Lin, Fiduccia–Mattheyses and Multilevel Methods
8–12 minutes -
How to Learn Compiler Data-Flow Analysis Algorithms: Control-Flow Graphs, Liveness, Reaching Definitions and Fixed Points
8–12 minutes -
How to Learn Conflict-Free Replicated Data Type (CRDT) Algorithms: State Merges, Concurrent Updates, OR-Sets and Convergence
8–12 minutes -
How to Learn Byzantine Fault-Tolerant Consensus Algorithms: Quorums, PBFT, View Changes and HotStuff
6–9 minutes -
How to Learn External-Sorting Algorithms: Runs, Multiway Merge, Replacement Selection and I/O-Aware Design
5–8 minutes -
How to Learn Numerical Root-Finding Algorithms: Bisection, Newton, Secant, Brent and Safeguarded Solvers
5–8 minutes -
How to Learn Automatic Differentiation Algorithms: Dual Numbers, Forward Mode, Reverse Mode, JVPs and VJPs
6–9 minutes -
How to Learn Combinatorial Generation Algorithms: Permutations, Combinations, Gray Codes and Ranking/Unranking
11–17 minutes -
How to Learn PageRank and Graph-Ranking Algorithms: Random Walks, Power Iteration, Personalization and Scalable Computation
10–14 minutes -
How to Learn Network Congestion-Control Algorithms: AIMD, Reno, CUBIC, ECN, BBR and L4S
10–15 minutes -
How to Learn Rate-Limiting Algorithms: Fixed Windows, Sliding Windows, Token Buckets and Distributed Limits
10–15 minutes -
How to Learn CPU-Scheduling Algorithms: FCFS, SJF, Round Robin, MLFQ, CFS and EEVDF
8–12 minutes -
How to Learn Database Crash-Recovery Algorithms: WAL, Checkpoints, ARIES, Redo and Undo
8–13 minutes -
How to Learn Database Concurrency-Control Algorithms: Two-Phase Locking, MVCC, OCC and Serializable Execution
9–13 minutes -
How to Learn Heuristic Search Algorithms: A*, Admissible Heuristics, Consistency and Memory–Optimality Trade-Offs
9–14 minutes -
How to Learn Merkle-Tree Algorithms: Hash Commitments, Inclusion Proofs, Consistency Proofs and Authenticated Data Structures
8–12 minutes -
How to Learn Matrix-Multiplication Algorithms: Classical Loops, Blocking, Strassen, GEMM and Performance Engineering
8–12 minutes -
How to Learn Stable-Matching Algorithms: Deferred Acceptance, Blocking Pairs, Proposer Optimality and Market Design
8–11 minutes -
How to Learn Regular-Expression Matching Algorithms: Thompson NFAs, DFAs, Backtracking and ReDoS Safety
8–12 minutes -
How to Learn Glaciers, Ice Sheets and the Cryosphere: From Snowfall to Ice Flow, Sea Level and Paleoclimate
6–9 minutes -
How to Learn Turbulence and Flow Instability: From Laminar Streams to Energy Cascades and Computational Fluid Dynamics
5–7 minutes -
How to Learn Smell, Taste and Flavour: From Chemical Molecules to Chemosensory Neural Coding
3–5 minutes -
How to Learn Liver Physiology, Metabolism and Detoxification: From Portal Blood to Metabolic Zonation
4–6 minutes -
How to Learn Solar Activity and Space Weather: From Sunspots to Flares, CMEs and Geomagnetic Storms
4–6 minutes -
How to Learn Volcanoes, Magma and Eruptions: From Melting Rock to Volcanic Hazards and Monitoring
4–7 minutes -
How to Learn Bone Remodeling, Calcium Homeostasis and Skeletal Physiology: From Structure to Mechanotransduction
4–6 minutes -
How to Learn Neural Memory and Synaptic Plasticity: From Experience to Lasting Neural Change
4–6 minutes -
How to Learn General-Graph Matching Algorithms: Augmenting Paths, Blossoms, Weighted Matching and Primal-Dual Reasoning
8–12 minutes -
How to Learn Cache-Replacement Algorithms: FIFO, LRU, CLOCK, ARC and Modern Page-Reclaim Policies
8–12 minutes -
How to Learn Minimum-Cost Flow Algorithms: Residual Costs, Potentials, Successive Shortest Paths and Network Simplex
8–12 minutes -
How to Learn Edit-Distance Algorithms: Dynamic Programming, Hirschberg, Bit-Parallel Methods and Wavefront Alignment
9–13 minutes -
How to Learn Memory-Allocation Algorithms: Free Lists, Buddy Allocation, Slabs, Size Classes and Fragmentation
9–13 minutes -
How to Learn Load-Balancing Algorithms: Round Robin, Least Connections, Consistent Hashing and Power of Two Choices
8–12 minutes -
How to Learn LSM-Tree Algorithms: Memtables, SSTables, Compaction and Read–Write Amplification
8–13 minutes -
How to Learn Database Join Algorithms: Nested Loops, Hash Joins, Merge Joins and Join-Order Optimisation
8–13 minutes -
How to Learn Galaxies, Redshift and the Expanding Universe: From Starlight to Modern Cosmology
5–8 minutes -
How to Learn Nuclear Fission, Fusion and Reactor Physics: From Binding Energy to Controlled Chain Reactions and Fusion Plasmas
6–9 minutes -
How to Learn Groundwater, Aquifers and Hydrogeology: From Rain Infiltration to Subsurface Flow and Water Security
6–8 minutes -
How to Learn Hemostasis, Blood Clotting and Wound Healing: From a Cut to Coagulation and Tissue Repair
5–7 minutes -
How to Learn Exoplanets and Planetary Habitability: From Transit Signals to Comparative Planetology
5–7 minutes -
How to Learn Ocean Tides and Coastal Dynamics: From Lunar Gravity to Real Shorelines
5–7 minutes -
How to Learn Plant Hormones, Tropisms and Growth Signalling: From Auxin to Developmental Control
5–8 minutes -
How to Learn Hearing and Auditory Transduction: From Sound Waves to Neural Coding
4–7 minutes -
How to Learn the Carbon Cycle and Biogeochemistry: From Photosynthesis to Oceans, Rocks and Climate Feedbacks
5–7 minutes -
How to Learn Earth’s Magnetic Field and the Geodynamo: From Compass Needles to Paleomagnetism and Core Dynamics
4–6 minutes -
How to Learn Vision and Phototransduction: From Light Entering the Eye to Neural Coding and Perception
6–8 minutes -
How to Learn the Digestive System, Nutrient Absorption and the Gut Microbiome: From Food Breakdown to Gastrointestinal Physiology
6–8 minutes -
How to Learn Atmospheric Chemistry, Ozone and Air Pollution: From Air Composition to Photochemical Reaction Networks
6–9 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.
