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 Learning Guide | Mastery Diagnostic & Repair Lab
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Primary 5 Science Learning Guide | Measurement, Units, Range & Resolution
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Primary 5 Science Learning Guide | Mixed-Concept Transfer Challenge Lab
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Primary 5 Science Learning Guide | Models, Assumptions, Simplification & Limits
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Primary 5 Science Learning Guide | Observation, Inference, Prediction & Conclusion
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Primary 5 Science Learning Guide | Open-Ended Answer Construction Application Lab
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Primary 5 Science Learning Guide | Plant & Human Reproduction Comparison, Sequence & Evidence
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Primary 5 Science Learning Guide | Plant & Human Systems Application Lab
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Primary 5 Science Learning Guide | Plant Transport, Respiratory & Circulatory Systems
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Primary 5 Science Learning Guide | Pollination, Fertilisation, Seeds & Fruits
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Primary 5 Science Learning Guide | Practical Planning, Data Recording & Conclusions
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Primary 5 Science Learning Guide | Primary 5 to Primary 6 Bridge, Consolidation & the PSLE Runway
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Primary 5 Science Learning Guide | Question Deconstruction, Conditions & Constraints
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Primary 5 Science Learning Guide | Rates, Time, Change & Comparative Reasoning
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Primary 5 Science Learning Guide | Reliability, Accuracy, Validity & Data Quality
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Primary 5 Science Learning Guide | Reproduction Application Lab
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Primary 5 Science Learning Guide | Reproduction in Plants and Humans
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Primary 5 Science Learning Guide | Retrieval, Spaced Review & Concept Transfer
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Primary 5 Science Learning Guide | Scaling, Ratios, Proportional Thinking & Estimation
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Primary 5 Science Learning Guide | Scientific Communication & Evidence Chains
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Primary 5 Science Learning Guide | Scientific Vocabulary & Precision Challenge Lab
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Primary 5 Science Learning Guide | Self-Checking & Exam Readiness Challenge Lab
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Primary 5 Science Learning Guide | Sequence, Cycles, Dependencies & Order of Events
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Primary 5 Science Learning Guide | Structure, Function, Systems & Cause-and-Effect
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Primary 5 Science Learning Guide | Variables, Fair Tests & Experimental Design
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Primary 5 Science Learning Guide | Water & Food Transport in Plants
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Primary 5 Science Learning Guide | Water & State Change Application Lab
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Primary 5 Science Learning Guide | Water, Changes of State, the Water Cycle & Evidence
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Primary 5 Science Learning Guide | What-If Changes & System Failure Reasoning
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Primary 5 Science Learning Hub | Water, Reproduction, Systems & Electricity
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Primary 5 Science Punggol | Legacy Entry to Systems & Variables
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Primary 5 Science Punggol | Systems, Variables & the PSLE Runway
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Primary 5 Science Sengkang | Systems & Variables Diagnostic
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Primary 5 Science Sengkang | The Voyage of Water
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Primary 5 Science Tuition Punggol | Systems, Variables and Interactions | The Voyage Series
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Primary 5 Science Tuition Sengkang | Systems, Variables & PSLE Foundations
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Primary 5 Science Tuition | Answering Techniques for Open-Ended Questions
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Primary 5 Science Tuition | Conductors and Insulators in Electrical Circuits
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Primary 5 Science Tuition | For Beginners: The Year Science Becomes Serious
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Primary 5 Science Tuition | How Are Seeds Dispersed? Wind, Water, Animals and Explosive Action
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Primary 5 Science Tuition | How Do Water and Food Move Through Plants?
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Primary 5 Science Tuition | How Does Blood Transport Oxygen and Carbon Dioxide?
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Primary 5 Science Tuition | Pollination, Fertilisation, Seeds and Fruits
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Primary 5 Science Tuition | The PSLE Science Engine Year
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Primary 5 Science Tuition | The Revision System for the Year Before PSLE
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Primary 5 Science Tuition | What Do Seeds Need to Germinate? Water, Air and Suitable Warmth
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Primary 5 Science Tuition | What Happens When One Bulb Is Removed? Series and Parallel Circuits
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Primary 5 Science Tuition | Where Will Water Droplets Form?
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Primary 5 Science Tuition | Which Switch Controls Which Bulb?
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Primary 5 Science Tuition | Why Do Bulbs Get Dimmer? Circuit Changes and Brightness
Browse every published Post
3746 results found
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How to Learn Bacterial Flagellar Motors: From Ion-Motive Force to Stator Remodeling, Torque and Directional Switching
11–17 minutes -
How to Learn Bacterial SMC Condensins and Chromosome Architecture: From ParB–parS Loading to Loop Organization, Replication and Segregation
11–16 minutes -
How to Learn Nitrogenase FeMo-Cofactor Assembly: From Iron–Sulfur Precursors to NifB, NifEN, NifH and Biological Nitrogen Fixation
11–16 minutes -
How to Learn Photosystem II Repair and D1 Turnover: From Photodamage to Thylakoid Remodeling, Proteolysis and Reaction-Centre Reassembly
10–15 minutes -
How to Learn Archaeal Histones and Chromatin: From DNA Wrapping to Hypernucleosomes, Gene Regulation and the Origins of Eukaryotic Chromatin
10–14 minutes -
How to Learn the Type VI Secretion System: From Contractile Phage-Tail Mechanics to Bacterial Competition, Effector Delivery and Immunity
11–17 minutes -
How to Learn Cyclic di-GMP Signalling: From GTP-Derived Second Messenger to Motility–Biofilm Switching and Local Bacterial Decisions
11–16 minutes -
How to Learn tmRNA–SmpB Trans-Translation and Bacterial Ribosome Rescue: From Nonstop mRNA to Protein Tagging, Proteolysis and Alternative Rescue Pathways
11–17 minutes -
How to Learn Bacterial Microcompartments and Metabolosomes: From Protein Shells to Toxic-Intermediate Control and Synthetic Metabolism
12–17 minutes -
How to Learn Riboswitches and Metabolite-Sensing RNA: From Aptamer Folding to Transcription, Translation and Catalytic Gene Control
11–16 minutes -
How to Learn Ferritin and Bacterioferritin: From Iron Oxidation to Mineral Nanocages, Ferritinophagy and Oxidative-Stress Control
10–15 minutes -
How to Learn Nuclear Pore Complexes and Nucleocytoplasmic Transport: From FG-Repeat Barriers to Ran-GTP Directionality and mRNA Export
11–16 minutes -
How to Learn Digital Holographic Microscopy (DHM): From Interference Holograms and Numerical Propagation to Quantitative Phase, 3D Tracking and Label-Free Cell Metrology
7–11 minutes -
How to Learn Cyanobacterial Circadian Clocks and KaiABC: From Protein Phosphorylation to Day–Night Anticipation and Metabolic Timing
11–17 minutes -
How to Learn Glow Discharge Optical Emission Spectroscopy (GD-OES/GDOES): From Argon Plasma Sputtering and Atomic Emission to Quantitative Coating Depth Profiles, Light Elements and Thin-Film Metrology
6–9 minutes -
How to Learn Differential Dynamic Microscopy (DDM): From Image Differences and Fourier Space to Diffusion, Active Matter, Microrheology and Cellular Dynamics
7–11 minutes -
How to Learn Low-Energy Ion Scattering (LEIS): From Binary Ion Collisions and Charge Exchange to Outermost-Layer Composition, Surface Segregation and Quantitative Interface Analysis
6–8 minutes -
How to Learn Intraflagellar Transport and Cilia: From Molecular Trains to Ciliary Assembly, Signalling and Motility
11–16 minutes -
How to Learn Interferometric Scattering Microscopy (iSCAT): From Rayleigh Scattering and Optical Interference to Single-Particle Tracking, Label-Free Proteins and Nanoscale Dynamics
8–11 minutes -
How to Learn Surface Forces Apparatus (SFA): From Molecular Separation and FECO Interferometry to DLVO Forces, Nanoconfinement, Adhesion and Boundary Lubrication
8–11 minutes -
How to Learn Thermally Stimulated Depolarization Current (TSDC/TSC): From Frozen Polarization and Thermally Activated Release to Dielectric Relaxation, Traps, Mobile Ions and Defect Spectroscopy
8–12 minutes -
How to Learn Gas Vesicles and Microbial Buoyancy: From GvpA Protein Shells to Vertical Migration and Acoustic Reporter Genes
10–16 minutes -
How to Learn Frederickson’s Heap-Selection Algorithm: Heap-Ordered Trees, Clans, Hierarchical Grouping, kth Selection and O(k) Optimality
8–12 minutes -
How to Learn the Goldberg–Radzik Shortest-Path Algorithm: Admissible Graphs, Topological Scans, Negative Edges and Bellman–Ford Engineering
7–10 minutes -
How to Learn Gabow’s Path-Based SCC Algorithm: DFS Preorders, Two Stacks, Component Roots and Linear-Time Strong Connectivity
6–10 minutes -
How to Learn Scanning Electrochemical Cell Microscopy (SECCM): From Nanopipette Meniscus Cells and Local Voltammetry to Grain-Boundary Electrochemistry, Electrocatalysis and Automated Nanoscale Mapping
8–12 minutes -
How to Learn the Micali–Vazirani Algorithm: Alternating Paths, Blossoms, Tenacity, Phases and O(√V·E) General Matching
7–11 minutes -
How to Learn Selenoproteins and Selenocysteine Recoding: From UGA Stop Codons to the 21st Amino Acid and Redox Enzymes
10–15 minutes -
How to Learn the Paterson–Stockmeyer Algorithm: Baby Steps, Giant Steps, Matrix Polynomials and Multiplication-Minimising Evaluation
6–10 minutes -
How to Learn the Coffman–Graham Algorithm: DAG Labels, Precedence Constraints, Two-Processor Optimality and Layered Scheduling
7–10 minutes -
How to Learn the Knuth–Yao DDG Algorithm: Probability Bits, Discrete Distribution Trees, Entropy Bounds and Exact Random Sampling
7–10 minutes -
How to Learn the Karp–Miller Coverability Algorithm: Petri Nets, ω-Acceleration, Ancestor Comparison, Finite Trees and Unbounded-State Reasoning
7–11 minutes -
How to Learn Ford–Johnson Merge-Insertion Sort: Pairing, Main Chains, Jacobsthal Insertion Order and Comparison-Minimising Sorting
8–11 minutes -
How to Learn Magnetosomes and Magnetotaxis: From Iron Biomineralization to Bacterial Compasses and Magnetofossils
11–17 minutes -
How to Learn the Cantor–Zassenhaus Algorithm: Square-Free Polynomials, Distinct Degrees, Random Splitting and Finite-Field Factorisation
7–11 minutes -
How to Learn Paige–Tarjan Partition Refinement: Blocks, Splitters, Bisimulation, Relational Coarsest Partitions and O(m log n) Engineering
8–12 minutes -
How to Learn the Garsia–Wachs Algorithm: Alphabetic Binary Trees, Weighted Path Length, Ordered Leaves and O(n log n) Construction
7–11 minutes -
How to Learn Reingold–Tilford Tree Layout: Tidy-Tree Aesthetics, Contours, Modifiers, Two-Pass Coordinates and Linear-Time Engineering
9–13 minutes -
How to Learn Murty’s Algorithm: Ranked Assignments, Partitioned Subproblems, Priority Queues and K-Best Data Association
8–13 minutes -
How to Learn the Hoshen–Kopelman Algorithm: Raster Scans, Union–Find Labels, Connectivity and Large-Scale Component Analysis
8–13 minutes -
How to Learn Dulmage–Mendelsohn Decomposition: Maximum Matchings, Structural Rank, Alternating Paths and Block-Triangular Sparse Systems
8–13 minutes -
How to Learn Circularly Polarized Luminescence (CPL): From Chiral Excited States and Dissymmetry Factors to Lanthanides, CP-OLEDs and Persistent Circular Emission
8–12 minutes -
How to Learn Capillary Electrophoresis (CE): From Electrophoretic Mobility and Electroosmotic Flow to CE-MS, Proteoforms and Biopharmaceutical Charge Variants
8–12 minutes -
How to Learn Fluorescence Anisotropy and Fluorescence Polarization: From Photoselection and Rotational Diffusion to Binding Assays, Membranes and Time-Resolved Dynamics
7–11 minutes -
How to Learn Hydrogen–Deuterium Exchange Mass Spectrometry (HDX-MS): From Amide Exchange and Deuterium Uptake to Protein Dynamics, Epitope Mapping and Residue-Level Binding
8–12 minutes -
How to Learn Differential Scanning Fluorimetry (DSF / Thermal Shift Assay): From Protein Unfolding and Fluorescence to Stability, Ligand Screening and Structural-Biology Optimization
7–10 minutes -
How to Learn Analytical Ultracentrifugation (AUC): From Sedimentation Boundaries and the Lamm Equation to Molecular Mass, Oligomers, Nanoparticles and Viral-Vector Quality
7–10 minutes -
How to Learn Bio-Layer Interferometry (BLI): From Optical Thickness and Sensorgrams to Binding Kinetics, Epitope Binning, Biologics and Viral-Vector Analysis
7–10 minutes -
How to Learn Microscale Thermophoresis (MST): From Temperature-Driven Molecular Motion to Binding Affinity, Complex Samples and Kinetic Interaction Analysis
7–10 minutes -
How to Learn Laser Speckle Contrast Imaging (LSCI): From Coherent Speckle Fluctuations to Blood-Flow Maps, Multi-Exposure Perfusion and Motion-Robust Biomedical Imaging
7–11 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.
