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 5 Science Tuition | Why Do Plants Wilt Without Water?
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Primary 5 Science Tuition | Why Do We Breathe Faster After Exercise?
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Primary 5 Science Tuition | Why Do Wet Clothes Dry Faster? Evaporation, Heat, Wind and Surface Area
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Primary 5 Science Tuition | Why Does a Bulb Light Only in a Complete Circuit?
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Primary 5 Science Tutor | Curie Series | Integrated Systems, Variables and Evidence
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Primary 5 Science | When Science Becomes a Systems Problem | Darwin × Voyage
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Primary 5 to Primary 6 Mathematics Bridge | Algebra & Unknowns from Number Sentences, Models & Inverse Thinking
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Primary 5 to Primary 6 Mathematics Bridge | Average from Totals, Equal Sharing & Data
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Primary 5 to Primary 6 Mathematics Bridge | Ratio from Fractions, Rate & Multiplicative Comparison
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Primary 5 to Primary 6 Mathematics Bridge | Speed from Rate, Time & Unit Conversion
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Primary 5 Tuition Sengkang | Building the PSLE Engine Before the Final Year
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Primary 5 → Primary 6 Mathematics Bridge | Percentage Difference, Percentage Change & Changing Reference Bases
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Primary 6 English Learning Guide | Articles, Determiners and Quantifiers: Reference, Quantity and Scope
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Primary 6 English Learning Guide | Cause, Contrast, Sequence and Comparison: Reading Logical Relationships
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Primary 6 English Learning Guide | Composition Sentence Craft, Cohesion and Paragraph Flow
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Primary 6 English Learning Guide | Comprehension Cloze: Cohesion, Context and Whole-Text Meaning
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Primary 6 English Learning Guide | Comprehension Question Types and Answer Precision
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Primary 6 English Learning Guide | Continuous Writing: Picture Stimulus Selection and Integration
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Primary 6 English Learning Guide | Continuous Writing: Topic, Plot and Revision
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Primary 6 English Learning Guide | Exam Error Analysis, Correction and Transfer
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Primary 6 English Learning Guide | Exam Simulation, Stamina, Time Control and Recovery
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Primary 6 English Learning Guide | Final PSLE Revision and the Secondary 1 Handover
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Primary 6 English Learning Guide | Grammar Cloze, Editing and Sentence Control
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Primary 6 English Learning Guide | Grammar for Meaning: Modality, Conditionals, Reported Speech and Passive Voice
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Primary 6 English Learning Guide | Independent Weekly Revision: Retrieval, Spacing, Transfer and Self-Checking
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Primary 6 English Learning Guide | Inference Across Paragraphs: Motive, Change and Evidence Boundaries
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Primary 6 English Learning Guide | Listening Comprehension: Preview, Evidence and Distractor Control
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Primary 6 English Learning Guide | Listening Comprehension: Selective Note-Taking, Numbers, Speakers and Change Signals
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Primary 6 English Learning Guide | Listening, Oral, Examination Control and the Secondary 1 Bridge
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Primary 6 English Learning Guide | Metacognition, Self-Checking and Independent Exam Control
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Primary 6 English Learning Guide | Non-Fiction Reading: Claims, Evidence, Fact, Opinion and Reliability
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Primary 6 English Learning Guide | Open-Ended Answer Editing: Precision, Completeness and Meaning
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Primary 6 English Learning Guide | Oral Communication: Reading Aloud and Stimulus-based Conversation
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Primary 6 English Learning Guide | Oral on Unfamiliar Topics: Reasoning Without Specialised Knowledge or Prepared Scripts
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Primary 6 English Learning Guide | Paper 2 Mixed-Skill Switching and Diagnostic Practice
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Primary 6 English Learning Guide | Phrasal Verbs, Idioms and Fixed Expressions: Meaning, Register and Natural Use
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Primary 6 English Learning Guide | Prepositions and Fixed Collocations: Time, Place, Movement and Natural Usage
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Primary 6 English Learning Guide | PSLE English Myths and False Rules: What the 2026 Examination Actually Requires
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Primary 6 English Learning Guide | Punctuation and Sentence Boundaries: Commas, Apostrophes and Dialogue
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Primary 6 English Learning Guide | Question Command Words and Answer Forms
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Primary 6 English Learning Guide | Reading Aloud: Phrasing, Stress, Pace, Pronunciation and Recovery
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Primary 6 English Learning Guide | Reading Under Time: Passage Navigation, Evidence and Recovery
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Primary 6 English Learning Guide | Reading, Comprehension, Inference and Evidence
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Primary 6 English Learning Guide | Reference, Pronouns and Cohesion: Tracking Meaning Across a Passage
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Primary 6 English Learning Guide | Situational Writing: Content Points and Tone
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Primary 6 English Learning Guide | Situational Writing: Source-Pack Selection, Transformation and Task Accuracy
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Primary 6 English Learning Guide | Spelling, Morphology and Word Formation in Editing
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Primary 6 English Learning Guide | Stimulus-Based Conversation: Opinion, Reason, Example, Follow-Up and Recovery
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Primary 6 English Learning Guide | Subject–Verb Agreement: Finding the True Subject
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Primary 6 English Learning Guide | Synthesis and Transformation: Meaning Preservation
Browse every published Post
3746 results found
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How to Learn Legume–Rhizobium Root Nodule Symbiosis: From Nod Factors to Infection Threads, Nitrogenase and Fixed-Nitrogen Exchange
8–12 minutes -
How to Learn Molybdenum Cofactor Biogenesis: From cPMP and Molybdopterin to Sulfite Oxidase, MOCS Genes and Human Disease
7–10 minutes -
How to Learn Cellular Zinc Homeostasis: From ZIP and ZnT Transporters to Metallothionein, Organelle Zinc and Signalling
6–9 minutes -
How to Learn NAD+ Metabolism and Compartmentation: From Salvage Pathways to Sirtuins, PARPs, Mitochondrial Transport and Redox Control
7–11 minutes -
How to Learn Cellular Copper Homeostasis: From CTR1 Uptake to Metallochaperones, ATP7A/ATP7B Trafficking and Cuproptosis
7–10 minutes -
How to Learn cGAS–STING Cytosolic DNA Sensing: From DNA Recognition to 2′3′-cGAMP, Golgi STING Activation and Interferon Control
7–11 minutes -
How to Learn Cellular Cholesterol Homeostasis: From SREBP–SCAP Sensing to LDL Uptake, Organelle Transfer, Storage and Efflux
7–10 minutes -
How to Learn Human Iron–Sulfur Cluster Biogenesis: From NFS1–ISCU Assembly to Cluster Transfer, DNA Metabolism and Disease
7–11 minutes -
How to Learn the Endothelial Glycocalyx: From Proteoglycan Architecture to Shear Sensing, Barrier Function and Vascular Homeostasis
6–9 minutes -
How to Learn Sphingolipid Metabolism: From ER Ceramide Synthesis to CERT, Sphingomyelin, S1P Signalling and Lipid Homeostasis
5–8 minutes -
How to Learn mTORC1 Lysosomal Nutrient Sensing: From Amino-Acid Sensors to Rag GTPases, Rheb and Growth–Autophagy Decisions
8–11 minutes -
How to Learn Heme Biosynthesis and Trafficking: From ALAS and Porphyrins to Ferrochelatase, Heme Distribution and Porphyrias
6–9 minutes -
How to Learn Nuclear Speckles: From SON–SRRM2 Condensates to RNA Processing, Genome Proximity and Splicing Control
6–8 minutes -
How to Learn Chloroplast Division: From FtsZ Ring Positioning to ARC6–PDV Coordination, DRP5B Constriction and Plastid Number Control
8–11 minutes -
How to Learn Eukaryotic DNA Mismatch Repair: From MutSα Recognition to MutLα Incision, PCNA Strand Choice and Microsatellite Stability
7–11 minutes -
How to Learn Caveolae and Mechanoprotection: From Caveolin–Cavin Architecture to Membrane-Tension Buffering, Signalling and Disease
7–10 minutes -
How to Learn COPI Retrograde Trafficking: From ARF1–Coatomer Assembly to KDEL Retrieval, Golgi Homeostasis and ER Quality Control
7–10 minutes -
How to Learn Schöning’s Random-Walk k-SAT Algorithm: Unsatisfied Clauses, Hamming Distance, Random Restarts and O*((2−2/k)^n) Search
7–10 minutes -
How to Learn Cytokinesis: From RhoA and the Contractile Ring to Midbody Control, ESCRT Abscission and Division Failure
8–11 minutes -
How to Learn Bluestein’s FFT Algorithm: Chirp Multiplication, Convolution, Arbitrary-Length DFTs and Prime-Size Fourier Transforms
5–8 minutes -
How to Learn Biomolecular Condensates: From Phase Separation to Stress Granules, Dynamic Composition and Material-State Control
7–10 minutes -
How to Learn Schroeppel–Shamir Subset Sum: Four-Way Splitting, Heap-Generated Pair Sums, Meet-in-the-Middle and O*(2^(n/4)) Space
6–9 minutes -
How to Learn the Nuclear Lamina: From Lamins and Genome Organisation to Nuclear Mechanics, Rupture and Repair
7–11 minutes -
How to Learn Thorup–Zwick Approximate Distance Oracles: Random Hierarchies, Pivots, Bunches, Stretch 2k−1 and Near-Optimal Graph Distance Queries
8–11 minutes -
How to Learn Lipid Droplets: From Neutral-Lipid Storage to Organelle Contacts, Lipolysis and Metabolic Stress
7–11 minutes -
How to Learn Eukaryotic DNA Replication Termination: From Fork Convergence to CMG Passage, MCM7 Ubiquitination and p97-Driven Replisome Unloading
7–11 minutes -
How to Learn BAF/SWI–SNF Chromatin Remodeling: From ATP-Driven Nucleosome Sliding to Enhancer Accessibility, Complex Diversity and Epigenetic Control
7–11 minutes -
How to Learn Non-Photochemical Quenching: From Thylakoid Acidification to PsbS, Xanthophyll Cycling and Photoprotective Heat Dissipation
7–11 minutes -
How to Learn PINK1–Parkin Mitophagy: From Mitochondrial Import Failure to Phospho-Ubiquitin, Parkin Activation and Selective Organelle Clearance
8–12 minutes -
How to Learn PIEZO Mechanosensitive Ion Channels: From Membrane Tension to Blade Curvature, Pore Opening and Cellular Force Sensing
13–19 minutes -
How to Learn Chloroplast Retrograde Signalling: From Tetrapyrroles and PAP to MEcPP, ROS, GUN1 and Nuclear Gene Expression
10–15 minutes -
How to Learn Retromer and Endosomal Cargo Recycling: From VPS35–VPS29–VPS26 to SNX3/SNX-BAR Sorting, Tubulation and Receptor Retrieval
9–14 minutes -
How to Learn the Eukaryotic RNA Exosome and Nuclear RNA Surveillance: From MTR4 Targeting to 3′→5′ Decay, RNA Processing and Transcriptome Cleanup
11–17 minutes -
How to Learn Eukaryotic Translesion DNA Synthesis: From PCNA Ubiquitination to Y-Family Polymerase Switching, REV1–Pol ζ Extension and Damage Tolerance
10–15 minutes -
How to Learn Plant Photorespiration: From Rubisco Oxygenation to the C₂ Cycle, Organelle Shuttling and Carbon Recovery
9–13 minutes -
How to Learn Cohesin and CTCF Loop Extrusion: From SMC ATPase Rings to TAD Boundaries, Enhancer Contacts and Sister-Chromatid Cohesion
10–14 minutes -
How to Learn MicroRNA Biogenesis and RISC Silencing: From Drosha–DGCR8 to Dicer, Argonaute Targeting and mRNA Repression
10–15 minutes -
How to Learn the Unfolded Protein Response: From ER Stress Sensing to IRE1–XBP1, PERK–ATF4, ATF6, ERAD and Proteostasis Recovery
11–16 minutes -
How to Learn Telomeres and Telomerase: From the End-Replication Problem to Shelterin, T-Loops, Repeat Addition and Telomere Homeostasis
11–16 minutes -
How to Learn Plant Circadian Clocks and Photoperiodic Flowering: From Light Entrainment to CCA1–PRR–Evening Loops, CONSTANS and Florigen
11–16 minutes -
How to Learn Eukaryotic Ribosome Biogenesis: From Nucleolar rRNA Transcription to Pre-Ribosome Assembly, Nuclear Export and Cytoplasmic Maturation
11–16 minutes -
How to Learn RAD51–BRCA Homologous Recombination: From DNA-End Resection to BRCA2-Mediated Filament Assembly, Homology Search and Error-Free Repair
10–15 minutes -
How to Learn Chloroplast Thylakoid Protein Targeting: From cpSec and cpTat to cpSRP, Alb3, GET3B and Photosystem Assembly
10–15 minutes -
How to Learn ESCRT Membrane Scission: From Ubiquitinated Endosomal Cargo to ESCRT-III Filaments, VPS4 Remodeling and Membrane Repair
10–15 minutes -
How to Learn Ribosome-Associated Quality Control: From Ribosome Collisions to ZNF598, hRQT, NEMF/LTN1 and Nascent-Chain Clearance
10–16 minutes -
How to Learn Eukaryotic DNA Replication Licensing: From ORC–Cdc6–Cdt1 Loading to MCM Double Hexamers and CMG Origin Firing
10–15 minutes -
How to Learn the Spliceosome Catalytic Cycle: From U1/U2 Recognition to RNA Catalysis, ATPase Proofreading and mRNA Release
10–15 minutes -
How to Learn Clathrin-Mediated Endocytosis: From AP2 Cargo Capture to Coat Curvature, Dynamin Scission and Uncoating
10–14 minutes -
How to Learn Chien Search: Error-Locator Polynomials, Finite-Field Roots, Reed–Solomon/BCH Decoding and Parallel Evaluation
8–12 minutes -
How to Learn the Lemke–Howson Algorithm: Best-Response Polytopes, Labels, Complementary Pivoting and Bimatrix Nash Equilibria
8–12 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.
