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 6 Science Learning Guide | Inputs, Outputs, Conservation & Material Tracking for PSLE
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Primary 6 Science Learning Guide | Integrated Multi-Concept Reasoning & Unfamiliar PSLE Setups
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Primary 6 Science Learning Guide | Interactions Within the Environment: Food Chains, Food Webs and Survival
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Primary 6 Science Learning Guide | Investigations, Variables, Fair Tests & Method
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Primary 6 Science Learning Guide | Life Cycles: Stage Order, Growth vs Reproduction, Comparisons & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Light: Sources, Reflection, Straight-Line Travel, Shadows & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Living Together: Interdependence, Competition, Shared Resources & Survival for PSLE
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Primary 6 Science Learning Guide | Magnets: Attraction vs Repulsion, Magnetic Materials, Poles, Distance & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Man’s Impact on the Environment: Conservation, Reforestation, Pollution, Resources & Global Warming for PSLE
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Primary 6 Science Learning Guide | Mass vs Weight, Gravitational Force, Motion & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Materials: Properties vs Uses, Strength, Waterproofness, Conductors, Insulators & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Matter, Water Cycle, Light & Heat for PSLE
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Primary 6 Science Learning Guide | Matter: Air Has Mass, Solids vs Liquids vs Gases, Shape, Volume, Compression & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | MCQ Distractors, Elimination & Error Patterns for PSLE
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Primary 6 Science Learning Guide | Measurement, Units, Resolution & Repeatability for PSLE
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Primary 6 Science Learning Guide | Mixed PSLE Science Practice Workshop with Original Worked Answers
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Primary 6 Science Learning Guide | Models, Assumptions, Limits & Scientific Claims for PSLE
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Primary 6 Science Learning Guide | Multi-Step Problem Solving, Constraints & Decision Paths for PSLE
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Primary 6 Science Learning Guide | Observation, Inference, Prediction & Conclusion for PSLE
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Primary 6 Science Learning Guide | Open-Ended Answer Construction, Completeness & Mark-Bearing Science for PSLE
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Primary 6 Science Learning Guide | Operational Definitions, Measurable Criteria & Classification Rules for PSLE
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Primary 6 Science Learning Guide | Photosynthesis: Energy, Matter, Evidence and Explanation
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Primary 6 Science Learning Guide | Plant Food vs Mineral Salts, Photosynthesis, Respiration & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Plant Transport, Digestion, Respiration & Circulation for PSLE
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Primary 6 Science Learning Guide | Plant Transport: Water vs Food-Carrying Tubes, Roots, Stems, Leaves, Transpiration & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Practical Planning, Data Recording & Conclusions for PSLE
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Primary 6 Science Learning Guide | Prediction, What-If Reasoning, Extrapolation & Transfer for PSLE
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Primary 6 Science Learning Guide | PSLE Questions, Explanations, Error Analysis & Revision
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Primary 6 Science Learning Guide | Question Deconstruction, Conditions & Constraints for PSLE
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Primary 6 Science Learning Guide | Rates, Time, Change & Comparative Reasoning for PSLE
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Primary 6 Science Learning Guide | Reproduction: Pollination vs Fertilisation, Seeds, Fruits, Dispersal, Fertilised Eggs & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Respiratory & Circulatory Systems: Oxygen, Carbon Dioxide, Heart, Pulse, Exercise & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Retrieval, Spaced Review, Interleaving & Long-Term Memory for PSLE
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Primary 6 Science Learning Guide | Safety, Risk Assessment & Responsible Investigation for PSLE
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Primary 6 Science Learning Guide | Sampling, Field Surveys, Populations & Ecological Evidence for PSLE
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Primary 6 Science Learning Guide | Scaling, Ratios, Proportional Thinking & Estimation for PSLE
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Primary 6 Science Learning Guide | Science Reading Comprehension, Dense Question Stems & Information Filtering for PSLE
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Primary 6 Science Learning Guide | Scientific Communication, Findings & Evidence Presentation for PSLE
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Primary 6 Science Learning Guide | Scientific Vocabulary, Precision & Answer Language for PSLE
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Primary 6 Science Learning Guide | Secondary Science Bridge, Independent Learning & Model Transition
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Primary 6 Science Learning Guide | Self-Explanation, Metacognitive Checking & Answer Verification for PSLE
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Primary 6 Science Learning Guide | Sequence, Cycles, Dependencies & System Pathways for PSLE
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Primary 6 Science Learning Guide | Sources vs Forms of Energy, Energy Conversion & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Testable Questions, Hypotheses & Investigation Design for PSLE
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Primary 6 Science Learning Guide | Water Cycle: Clouds vs Water Vapour, Evaporation, Condensation, Transpiration & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | What-If Changes, System Failure & Counterfactual Reasoning for PSLE
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Primary 6 Science Learning Hub | Concepts, Inquiry, Evidence & PSLE Readiness
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Primary 6 Science Punggol | PSLE Reconstruction & Examination Craft
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Primary 6 Science Sengkang | The Voyage of Water
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Primary 6 Science Tuition Sengkang | 2026 PSLE Science & Scientific Reasoning
Browse every published Post
3746 results found
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How to Learn Placental Physiology and Maternal–Fetal Exchange: From Trophoblasts to Nutrient Transport and Fetal Growth
4–6 minutes -
How to Learn the Alias Method: Walker–Vose Tables, O(1) Discrete Sampling and Probability Buckets
3–4 minutes -
How to Learn Disjoint Sparse Tables: Associative Range Queries, Prefix–Suffix Blocks and O(1) Answers
2–4 minutes -
How to Learn Interval Trees: Overlap Queries, Max-End Augmentation, Search Pruning and Dynamic Updates
2–3 minutes -
How to Learn the Skin Barrier: From Keratinocytes and Ceramides to Water Loss, Immunity and Barrier Repair
4–6 minutes -
How to Learn the Hungarian Algorithm: Assignment Matrices, Potentials, Augmenting Paths and Optimal Matching
2–4 minutes -
How to Learn Pancreatic Glucose Control: From Islet Cells to Insulin, Glucagon and Whole-Body Metabolism
4–6 minutes -
How to Learn SA-IS Suffix Array Construction: L/S Types, LMS Substrings, Induced Sorting and Linear-Time Text Indexing
8–11 minutes -
How to Learn Matroid Intersection: Independence Oracles, Exchange Graphs, Augmenting Paths and Combinatorial Optimization
8–12 minutes -
How to Learn the Number Theoretic Transform: Modular Roots of Unity, Butterflies, Exact Convolution and CRT
7–10 minutes -
How to Learn Wavelet Matrices: Bitvector Rank, Range Quantiles, Frequency Queries and Succinct Sequence Indexing
8–11 minutes -
How to Learn the Berlekamp–Massey Algorithm: Linear Recurrences, Discrepancies, Minimal Polynomials and BCH Decoding
8–11 minutes -
How to Learn Work-Stealing Schedulers: Deques, Fork–Join Parallelism, Steals, Work–Span Bounds and Runtime Locality
7–11 minutes -
Chandy–Lamport Snapshot | Distributed Systems Learning Guide
7–11 minutes -
How to Learn Contraction Hierarchies: Node Contraction, Shortcut Edges, Witness Searches and Fast Road Routing
8–12 minutes -
How to Learn Atmospheric Electricity and Lightning: From Charge Separation to Leaders, Sprites, Gamma-Ray Flashes and Satellite Detection
8–12 minutes -
How to Learn Thermoelectricity and Thermoelectric Materials: From the Seebeck and Peltier Effects to zT, Cooling and Waste-Heat Power
9–13 minutes -
How to Learn Synthetic Biology and Gene Circuits: From Promoters and Feedback to Cell-Free Systems, Biofoundries and Programmable Living Systems
8–11 minutes -
How to Learn Geophysical Fluid Dynamics: From Coriolis and Geostrophic Balance to Rossby Waves, Eddies and Planetary Circulation
8–12 minutes -
How to Learn Reaction–Diffusion and Biological Pattern Formation: From Turing Instability to Morphogens, Waves and Tissue Morphogenesis
6–8 minutes -
How to Learn Electrocatalysis and Fuel Cells: From Electrode Kinetics to ORR, HER, Electrolysers and Energy Conversion
6–9 minutes -
How to Learn Single-Cell and Spatial Omics: From Cell Heterogeneity to Transcriptomes, Proteomes and Tissue Maps
6–9 minutes -
How to Learn Cryobiology and Biopreservation: From Ice Formation to Vitrification, Nanowarming and Organ Banking
6–9 minutes -
How to Learn Membrane Separations and Desalination: From Osmosis and Selectivity to Reverse Osmosis, Nanofiltration and Precision Ion Transport
6–9 minutes -
How to Learn Isotope Geochemistry and Environmental Tracers: From Fractionation and Delta Notation to Water, Climate, Provenance and Earth-System History
5–8 minutes -
How to Learn Protein Engineering and Directed Evolution: From Sequence–Structure–Function to Fitness Landscapes, Selection and De Novo Design
6–9 minutes -
How to Learn Quantum Sensing and Precision Metrology: From Shot Noise to Atomic Clocks, NV Magnetometry and Rydberg Sensors
6–8 minutes -
How to Learn Microplastics and Environmental Fate: From Polymer Fragmentation to Transport, Measurement, Plastisphere and Global Exposure
7–10 minutes -
How to Learn Magnetohydrodynamics and Plasma Flows: From Frozen-In Magnetic Fields to Alfvén Waves, Reconnection and Space/Fusion Plasmas
6–9 minutes -
How to Learn Porous Materials and Adsorption: From Surface Area and Pores to Zeolites, MOFs and Molecular Separation
7–10 minutes -
How to Learn Ecotoxicology and Environmental Risk: From Dose–Response to Bioaccumulation and Ecosystem Protection
6–9 minutes -
How to Learn Computational Chemistry and Molecular Simulation: From Potential Energy Surfaces to Quantum Chemistry, Molecular Dynamics and Machine-Learned Potentials
6–10 minutes -
How to Learn Plasma Physics: From Ionised Gas to Debye Shielding, Waves and Magnetised Plasmas
6–9 minutes -
How to Learn Stem Cells and Cell Differentiation: From Potency to Cell-Fate Decisions and Regeneration
5–7 minutes -
How to Learn the Blood–Brain Barrier and Neurovascular Unit: From Tight Junctions to Selective Brain Transport
5–7 minutes -
How to Learn Gomory–Hu Trees: All-Pairs Minimum Cuts, Cut-Equivalent Trees, n−1 Max-Flows and Query Compression
8–12 minutes -
How to Learn Directed Minimum Spanning Trees: Arborescences, Chu–Liu/Edmonds, Cycle Contraction and Rooted Optimization
8–11 minutes -
How to Learn the FM-Index: Burrows–Wheeler Transform, Backward Search, Rank Queries and Compressed Full-Text Search
7–11 minutes -
How to Learn Suffix Trees with Ukkonen’s Algorithm: Compressed Suffixes, Active Points, Suffix Links and Linear-Time Construction
8–12 minutes -
How to Learn Delaunay Triangulation Algorithms: Empty Circles, Randomized Incremental Insertion, Edge Flips and Robust Predicates
8–12 minutes -
How to Learn Dominator-Tree Algorithms: Control-Flow Graphs, Immediate Dominators, Lengauer–Tarjan and SSA
8–12 minutes -
How to Learn Retroactive Data Structures: Editing the Past, Partial and Full Retroactivity, Timelines and Consistency
8–12 minutes -
How to Learn Fusion Trees: Word-RAM Parallelism, Key Sketches, Predecessor Search and Sublogarithmic Queries
9–14 minutes -
How to Learn Eertrees (Palindromic Trees): Distinct Palindromes, Suffix Links, Online Updates and Factorization
9–13 minutes -
How to Learn Li Chao Trees: Dynamic Line Envelopes, Point Queries, Segment Variants and DP Optimization
9–13 minutes -
How to Learn Mo’s Algorithm: Offline Range Queries, Block Ordering, Window Updates and Locality Optimization
8–12 minutes -
How to Learn Soft Heaps: Controlled Key Corruption, Meldable Priority Queues, Amortized Bounds and MST Applications
9–14 minutes -
How to Learn Tropical Cyclones and Rapid Intensification: From Warm Oceans and Eyewalls to Vortex Alignment and Forecast Uncertainty
11–17 minutes -
How to Learn Wave Optics, Interference and Polarization: From Double Slits to Coherence, Diffraction and Optical Information
9–14 minutes -
How to Learn Supramolecular Chemistry and Molecular Recognition: From Noncovalent Forces to Host–Guest Systems and Molecular Machines
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.
