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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How to Learn Basic English (Chinese Edition) | Start Here | 零基础英语入门
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.001 | Start With the Most Useful Words | 先学最有用的单词
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.002 | Learn Meaning, Sound and Spelling Together | 意思、发音和拼写一起学
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.003 | Learn Words in Phrases, Not Alone | 单词要放进短语和句子里
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.004 | Remember Words With Retrieval and Spaced Review | 用回忆和间隔复习记住单词
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.005 | People and Family Words | 人与家庭英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.006 | Home and Everyday Objects | 家与日常物品英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.007 | Food and Drink | 食物与饮料英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.008 | Core Action Verbs | 核心动作动词
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.009 | Basic Adjectives and Opposites | 基础形容词与反义词
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.010 | Numbers, Time and Days | 数字、时间与星期
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.011 | Question Words | 英语疑问词
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.012 | Places and Transport | 地点与交通英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.013 | Body and Health Words | 身体与健康英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.014 | School and Work Words | 学习与工作英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.015 | Common Verb Phrases | 常用动词短语
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.016 | Word Families for Beginners | 初级词族
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.017 | Clothes and Colours | 衣服与颜色英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.018 | Weather and Seasons | 天气与季节英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.019 | Shopping and Money | 购物与金钱英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.020 | Technology and Communication | 科技与通讯英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.021 | Hobbies and Free Time | 兴趣爱好与休闲英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.022 | Nature and Outdoors | 自然与户外英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.023 | Everyday Polite Words | 日常礼貌英语词汇与短语
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.024 | Signs, Notices and Simple Instructions | 标识、通知与简单指令英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.025 | Housework and Tidying Up | 家务与整理英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.026 | Feelings and Everyday Needs | 感受与日常需要英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.027 | Materials, Shapes and Sizes | 材料形状与大小英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.028 | Using a Learner’s Dictionary | 零基础英语词典查词方法
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.029 | Pronouns and Possessive Words | 人称代词与所属词
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.030 | Articles and Quantity Words | 冠词与数量词
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.031 | Prepositions of Place, Time and Movement | 地点、时间与方向介词
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.032 | Connecting and Sequence Words | 连接词与顺序词
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.033 | Frequency and Habit Words | 频率与习惯英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.034 | Degree and Intensity Words | 程度与强度英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.035 | Ability, Permission and Possibility Words | 能力、许可与可能性英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.036 | Comparison and Difference Words | 比较与差异英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.037 | Negation and Limiting Words | 否定与限制英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.038 | Time Reference Words | 时间指示英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.039 | Adverbs of Manner and Speed | 方式与速度英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.040 | Thinking, Knowing and Memory Words | 思考、理解与记忆英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.041 | Animals and Pets | 动物与宠物英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.042 | Kitchens, Meals and Cooking | 厨房、餐食与烹饪英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.043 | Hotels and Accommodation | 酒店与住宿英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.044 | Restaurants and Eating Out | 餐馆与外出用餐英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.045 | Holidays and Vacation Travel | 假期与旅行英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.046 | Airports and Flights | 机场与航班英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.047 | Celebrations, Parties and Special Days | 庆祝、聚会与特别日子英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.048 | Accessories and Personal Belongings | 配饰与随身物品英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.049 | Cinema, Television and Entertainment | 电影、电视与娱乐英语词汇
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.
