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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100 Primary English Tips Rebuilt as 10 Language Capabilities | Darwin × Voyage
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100 Primary Mathematics Tips Rebuilt as 10 Capabilities | Darwin × Voyage
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100 Primary Science Tips Rebuilt as 10 Scientific Capabilities | Darwin × Voyage
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7 Mathematics Strategies That Survive Unfamiliar Questions
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A Capability Profile Without Labelling the Child | Evidence, Support Conditions and the Next Learning Move
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A Workable Weekday Routine for P4 to P6: School, Rest, Screens, Study
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Accessible Learning Tasks Without Silent Target Changes | Change Access, Preserve the Learning Goal
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Accessible Learning Tasks Without Silent Target Changes | Preserve the Learning Goal While Changing Access
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Additional Mathematics Challenging Questions | An Advanced Worked Workshop
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Additional Mathematics Classroom | Chapter 10: Differentiation — Gradient Functions, Power/Product/Quotient/Chain Rules, Tangents, Normals and Rates | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 11: Further Applications of Differentiation — Increasing/Decreasing Functions, Stationary Points, First/Second Derivative Tests and Optimisation | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 12: Differentiation of Trigonometric, Exponential and Logarithmic Functions — Advanced Chain Rule, Tangents, Rates and Optimisation | SEC G3 K341
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Additional Mathematics Classroom | Chapter 13: Integration — Reverse Differentiation, Constants, Linear-Factor Integrals and G3 Trigonometric/Exponential/Logarithmic Extension | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 14: Applications of Integration — Definite Integrals, Signed Accumulation, Area Under Curves and Axis Crossings | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 15: Kinematics — Displacement, Velocity, Acceleration, Direction Changes, Total Distance and Motion Through Calculus | SEC G3 K341
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Additional Mathematics Classroom | Chapter 1: Simultaneous Equations, Polynomials and Partial Fractions | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 2: Quadratic Functions, Discriminants, Inequalities and Line–Curve Conditions | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 3: Binomial Theorem, General Terms and Coefficient Reasoning | SEC G3 K341
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Additional Mathematics Classroom | Chapter 4: Surds, Exact Algebra and Rationalising Denominators | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 5: Exponential and Logarithmic Functions, Laws, Equations, Graphs and Models | SEC G3 K341
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Additional Mathematics Classroom | Chapter 6: Coordinate Geometry in Two Dimensions — Lines, Midpoints, Rectilinear Areas and Circles | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 7: Linear Law, Straight-Line Transformations, Parameter Recovery and Model Testing | SEC G3 K341
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Additional Mathematics Classroom | Chapter 8: Trigonometric Functions, Graphs, Identities, Formulae and Equations | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 9: Proofs in Plane Geometry — Parallel Lines, Congruence, Similarity, Midpoint and Tangent–Chord Reasoning | SEC G3 K341
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Additional Mathematics Classroom | Complete Chapter-by-Chapter SEC 2027 Route | G2 K232 / G3 K341
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Additional Mathematics Learning Hub | Secondary 3–4 A-Math Guides
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Additional Mathematics Strategies | Build the Algebra Route Before Speed
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Additional Mathematics Study Guide | SEC G2 & G3, Topics and Worked Examples
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Additional Mathematics Tuition Punggol | Secondary 3–4 A-Math | The Voyage Series
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Additional Mathematics Tuition Sengkang | S3–S4 Learning System
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Additional Mathematics Word Problems | Worked Examples from Situations to Equations and Calculus
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Algorithms & Computing Hub | From First Principles to Professional Systems
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Algorithms Learning Roadmap | Trace, Reconstruct, Design and Evaluate
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Algorithms Quartermaster | Methods, Tools and Representations Agent
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Alicia’s First Secondary 1 Report
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Anchor Green Primary School: A Parent’s Learning Guide
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Anomaly | When Learning Behaves Differently Than Expected
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Archivist | Index, Enumeration and Orphan-Control Agent
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Arrival State | What Has Actually Arrived at the Tutorial?
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Assembly and Configuration | Putting the Right Supports Around the Learner
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Baseline Before Intervention | Marie Curie Series | What Could the Learner Do Before We Changed Anything?
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Beatrice’s PSLE Week
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Becoming a Private Tutor in Singapore | Professional, Business, Tax, Privacy and Home-Tuition Responsibilities
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Before the First Tuition Lesson in Sengkang | What Parents Should Prepare
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Biochemistry, Metabolism & Molecular Homeostasis | Cofactors, Metals, Lipids and Flux
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Biology & Living Systems | Cells, Organisms, Structure and Function
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Bridgekeeper | Cross-Fort Handoff Agent
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Cape Canaveral Series | The Learning Place Where Preparation Becomes Independent Motion
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Career & Workplace Literacy Tutor | Curie Series | Understanding How Work Systems Change
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Career Change & Reinvention Tutor | Curie Series | Moving Capability Into a New Field
Browse every published Post
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How to Learn Neighbouring Group Participation: From Anchimeric Assistance and Bridged Ions to Rate Acceleration, Stereochemistry and Mechanistic Proof
5–7 minutes -
How to Learn Transition State Theory and the Eyring Equation: From Molecular Barriers and Activated Complexes to ΔG‡, ΔH‡, ΔS‡ and Rate Constants
5–7 minutes -
How to Diagnose a PSLE Science Paper by Error Type
14–21 minutes -
How to Use a PSLE Science Correction Book as a Scientific Learning Tool
13–19 minutes -
How to Combine Two Science Concepts in One PSLE Question
13–19 minutes -
How to Check a PSLE Science Answer Without Re-doing the Whole Question
12–18 minutes -
How to Learn X-ray Photoelectron Spectroscopy (XPS): From the Photoelectric Effect and Binding Energy to Surface Composition, Chemical Shifts and Evidence Limits
8–12 minutes -
How to Learn the Trans Effect and Trans Influence: From Square-Planar d8 Complexes to Associative Substitution, Bond Weakening and Ligand-Directed Reactivity
7–11 minutes -
How to Learn the Woodward–Hoffmann Rules: From Orbital Symmetry to Electrocyclic Reactions, Cycloadditions, Sigmatropic Rearrangements and Stereochemical Prediction
7–10 minutes -
How to Learn Debye–Hückel Theory and Ionic Activity: From Ionic Strength and Electrostatic Screening to Activity Coefficients, Equilibria and Model Limits
7–11 minutes -
How to Learn Microwave Kinetic Inductance Detectors (MKIDs): From Cooper-Pair Breaking and Quasiparticles to Resonator Shifts, Multiplexing and Cryogenic Photon Detection
11–16 minutes -
How to Learn Laser Ultrasonics: From Thermoelastic Generation and Acoustic Propagation to Interferometric Detection, Dispersion and Non-Contact Material Measurement
9–14 minutes -
How to Learn Landauer Conductance and Ballistic Quantum Transport: From Transmission Channels to 2e²/h, Quantum Point Contacts and Mesoscopic Resistance
10–15 minutes -
How to Rebuild a PSLE Science Explanation When One Condition Changes
12–18 minutes -
How to Learn Optical Frequency Combs: From Mode-Locked Pulse Trains to f_rep and f_CEO, Self-Referencing and Optical Frequency Metrology
10–15 minutes -
How to Recover When You Cannot Start a PSLE Science Question
10–15 minutes -
How to Use Counterexamples to Test a PSLE Science Answer Choice
10–14 minutes -
How to Reason From Unexpected Experimental Results in PSLE Science
11–16 minutes -
How to Learn Cyclic Voltammetry: From Potential Sweeps and Diffusion Peaks to Reversibility, Scan-Rate Diagnostics and Reaction Mechanisms
8–12 minutes -
How to Learn Hard and Soft Acids and Bases (HSAB): From Lewis Acidity and Polarizability to Metal–Ligand Selectivity, Stability and Model Limits
7–10 minutes -
How to Learn the Curtin–Hammett Principle: From Conformer Equilibria to Competing Transition States, Product Ratios and Stereochemical Control
7–10 minutes -
How to Learn Marcus Electron Transfer Theory: From Redox Thermodynamics to Reorganisation Energy, Activation Barriers, Electronic Coupling and the Inverted Region
7–10 minutes -
How to Learn Superconducting Nanowire Single-Photon Detectors: From Cooper-Pair Condensates and Hotspots to Switching Pulses, Timing Jitter and Quantum-Light Detection
12–18 minutes -
How to Learn Phononic Crystals and Acoustic Band Gaps: From Periodic Elastic Structure to Bragg Scattering, Local Resonance, Dispersion and Wave Control
11–17 minutes -
How to Learn Coulomb Blockade and Single-Electron Tunnelling: From Charging Energy and Tunnel Junctions to Coulomb Diamonds, Quantum Dots and Electron Counting
10–15 minutes -
How to Learn Pound–Drever–Hall Laser Frequency Stabilisation: From Phase Modulation and Cavity Reflection to Error Signals, Feedback Loops and Sub-Linewidth Frequency Control
11–16 minutes -
How to Learn Mitochondrial β-Barrel Assembly by the SAM Complex: From TOM–Small Tim Transfer to SAMM50 Lateral Gating, Tom40/VDAC Folding and Outer-Membrane Architecture
11–16 minutes -
How to Learn the Bacterial Tol–Pal Complex: From TolQRA Proton-Motive Force to Pal–Peptidoglycan Coupling, Outer-Membrane Homeostasis and Cell Division
11–16 minutes -
How to Learn Chloroplast Cyclic Electron Flow Around Photosystem I: From PGR5/PGRL1 and NDH Pathways to Proton-Motive Force, ATP Balance and Photoprotection
11–17 minutes -
How to Learn the ER Membrane Protein Complex (EMC): From EMC3–EMC6 Insertase Architecture to Difficult Transmembrane Helices, Multipass Protein Biogenesis and Quality Control
8–12 minutes -
How to Learn Hopcroft–Tarjan Triconnected Decomposition: Separation Pairs, DFS Lowpoints, Split Components and SPQR-Tree Foundations
9–14 minutes -
How to Learn Kirkpatrick’s Planar Point-Location Algorithm: Triangulations, Low-Degree Independent Sets, Hierarchies and O(log n) Queries
7–11 minutes -
How to Learn the Hirschberg–Sinclair Leader-Election Algorithm: Bidirectional Probes, Exponential Radius, Active Candidates and O(n log n) Messages
8–11 minutes -
How to Learn Pippenger Multi-Scalar Multiplication: Scalar Windows, Buckets, Running Sums and High-Performance Elliptic-Curve MSM
8–12 minutes -
Jonker–Volgenant Assignment Algorithm | LAPJV Learning Guide
8–13 minutes -
How to Learn the Ryu Float-to-String Algorithm: IEEE 754, Shortest Round-Trip Decimals, Integer Arithmetic and Fast Number Formatting
8–12 minutes -
How to Learn the Schieber–Vishkin LCA Algorithm: Inlabels, Ascendant Bitsets, Path Heads and O(1) Lowest-Common-Ancestor Queries
7–11 minutes -
How to Learn Cole–Vishkin Deterministic Coin Tossing: Bit Differences, Colour Reduction, O(log* n) Rounds and Distributed Ring Algorithms
7–11 minutes -
How to Learn Taphonomy and Fossil Preservation: From Death and Decay to Burial, Diagenesis, Lagerstätten and Fossil-Record Bias
8–12 minutes -
How to Learn Epitranscriptomics and RNA Modifications: From m6A and Pseudouridine to RNA Fate, Single-Cell Maps and Quantitative Modification Biology
8–12 minutes -
How to Learn Landslides and Slope Stability: From Shear Strength and Pore Pressure to Rainfall Thresholds, InSAR Monitoring and Cascading Hazards
7–11 minutes -
How to Learn Rémy’s Algorithm: Uniform Random Binary Trees, Random Grafting, Catalan Structure and Exact Sampling
7–10 minutes -
How to Learn Geobiology and Microbe–Mineral Interactions: From Microbial Metabolism and Mineral Redox to Biosignatures, Deep Life and Astrobiology
8–11 minutes -
How to Learn the Sugiyama Framework: Cycle Removal, Layer Assignment, Crossing Minimization and Hierarchical Graph Drawing
6–9 minutes -
How to Learn the Chinese Postman Algorithm: Euler Tours, Odd-Degree Vertices, Minimum-Weight Matching and Route Inspection
6–9 minutes -
How to Learn Barrett Reduction: Reciprocal Precomputation, Quotient Approximation, Correction Steps and Fast Modular Arithmetic
6–9 minutes -
How to Learn Mammalian DNA Methylation Maintenance: From Replication-Generated Hemi-Methylated CpGs to UHRF1, DNMT1, PAF15/H3 Ubiquitin Signals and Epigenetic Inheritance
6–9 minutes -
How to Learn Plant Ammonium Uptake and Homeostasis: From AMT1 Root Transport to CIPK23 Phosphorylation, GS–GOGAT Assimilation and Ammonium-Toxicity Control
5–8 minutes -
How to Learn Bacterial Undecaprenyl Phosphate Carrier Recycling: From C55-P Lipid Carriers to UppP/BacA Dephosphorylation, UptA Flipping and Cell-Envelope Glycan Supply
6–9 minutes -
How to Learn Bacterial Lipoprotein Maturation: From Sec-Exported Prolipoproteins and Lgt Diacylglycerylation to LspA Cleavage, Lnt/LnsAB N-Acylation and Membrane Anchoring
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.
