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 Vocabulary (Chinese Edition) | Lesson No.050 | Sports, Games and Competition | 体育、游戏与比赛英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.051 | Appointments and Scheduled Services | 预约与定时服务英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.052 | Post, Parcels and Deliveries | 邮寄、包裹与配送英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.053 | Everyday Banking and Payments | 日常银行与付款英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.054 | Bills, Utilities and Household Services | 账单、水电与家庭服务英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.055 | Measurements, Units and Everyday Quantities | 测量、单位与日常数量英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.056 | Household Appliances and Controls | 家用电器与控制英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.057 | Renting a Home and Moving In | 租房与入住英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.058 | Subscriptions, Memberships and Renewals | 订阅、会员与续费英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.059 | Product Labels, Packaging and Dates | 商品标签、包装与日期英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.060 | Office Documents, Files and Equipment | 办公文件、档案与设备英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.061 | Countries, Nationalities and Languages | 国家、国籍与语言英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.062 | Personal Care and Toiletries | 个人护理与洗漱用品英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.063 | Library, Books and Borrowing | 图书馆、书籍与借阅英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.064 | Job Applications and Employment Basics | 求职申请与就业基础英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.065 | Courses, Classes and Enrolment | 课程、课堂与报名英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.066 | Haircuts, Barbers and Salon Services | 理发、理发店与美发服务英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.067 | Meetings, Agendas and Workplace Coordination | 会议、议程与工作协调英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.068 | Neighbours, Roommates and Shared Living | 邻居、室友与共同居住英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.069 | Museums, Galleries and Exhibitions | 博物馆、美术馆与展览英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.070 | Pharmacy and Medicine-Label Vocabulary | 药房与药品标签基础英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.071 | School Reports, Homework and Parent–Teacher Communication | 学校报告、作业与家校沟通英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.072 | Emergency Signs and Asking for Help | 紧急标识与求助英语词汇
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.073 | Say, Tell, Speak and Talk | 说话动词辨析与练习
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How to Learn Basic English Vocabulary (Chinese Edition) | Lesson No.074 | Hear, Listen, See, Look and Watch | 听与看动词辨析与练习
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How to Learn Basic English Vocabulary (Chinese Edition) | Start Here | 零基础英语词汇入门
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How to Learn Basic English | Start Here
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How to Measure Mathematics Improvement | Better Than One Test Score
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How to Read a Primary Report Book and WA Scores
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How to Read Your Child’s Prelim Paper: The 20-Minute Mark Audit
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How to Revise for End-of-Year Exams in Primary 3, 4 and 5
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How to Stop Rushing Through Schoolwork | A One-Week Checking Reset
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How to Study When Four Papers Land in One Week
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How to Use Past-Year Papers Without Wasting Them
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How to Work as a Tutor | A Professional Guide to Diagnosing, Teaching, Reviewing and Releasing Support
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How to Work With a Tutor | A Student Guide to Getting Help and Becoming More Independent
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How to Work With Your Child’s Tutor | A Parent Guide to Better Tuition and Independent Learning
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How Tone, Attitude and Viewpoint Shape Interpretation | English Tuition Sengkang
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How Transitive and Intransitive Verbs Control Direct and Indirect Objects | English Learning Guide
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How Tuition Works | From Diagnosis to Independent Performance
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How Understanding Works in Learning | Meaning, Structure, Explanation, Transfer and Reconstruction
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How Unexpected Results Reveal Hidden Variables in Science | Science Tuition Sengkang
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How Units and Measurement Protect Mathematical Meaning | Mathematics Tuition Sengkang
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How Very, Too, Enough, So, Such and Other Degree Expressions Change the Strength of a Description | English Learning Guide
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How Vocabulary Becomes Writing Power | English Tuition Sengkang
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How Vocabulary Works Across Reading and Writing | From Word Encounter to Precise Use
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How We Know Learning Has Really Held | From Practice to Transfer and Examination
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How Worked Examples Work in Learning | Seeing the Route, Explaining the Decisions and Then Carrying It Alone
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How Working Memory Works in Learning | Holding, Updating, Linking and Losing the Problem
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How Writing Moves From Sentence to Paragraph to Essay | English Tuition Sengkang
Browse every published Post
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How to Learn Krylov-Subspace Algorithms: Conjugate Gradient, GMRES, Residuals and Preconditioning
7–11 minutes -
How to Learn Numerical ODE Solver Algorithms: Euler, Runge–Kutta, Adaptive Step Size, Stiffness and BDF
9–13 minutes -
How to Learn Graph Partitioning Algorithms: Edge Cuts, Kernighan–Lin, Fiduccia–Mattheyses and Multilevel Methods
8–12 minutes -
How to Learn Compiler Data-Flow Analysis Algorithms: Control-Flow Graphs, Liveness, Reaching Definitions and Fixed Points
8–12 minutes -
How to Learn Conflict-Free Replicated Data Type (CRDT) Algorithms: State Merges, Concurrent Updates, OR-Sets and Convergence
8–12 minutes -
How to Learn Byzantine Fault-Tolerant Consensus Algorithms: Quorums, PBFT, View Changes and HotStuff
6–9 minutes -
How to Learn External-Sorting Algorithms: Runs, Multiway Merge, Replacement Selection and I/O-Aware Design
5–8 minutes -
How to Learn Numerical Root-Finding Algorithms: Bisection, Newton, Secant, Brent and Safeguarded Solvers
5–8 minutes -
How to Learn Automatic Differentiation Algorithms: Dual Numbers, Forward Mode, Reverse Mode, JVPs and VJPs
6–9 minutes -
How to Learn Combinatorial Generation Algorithms: Permutations, Combinations, Gray Codes and Ranking/Unranking
11–17 minutes -
How to Learn PageRank and Graph-Ranking Algorithms: Random Walks, Power Iteration, Personalization and Scalable Computation
10–14 minutes -
How to Learn Network Congestion-Control Algorithms: AIMD, Reno, CUBIC, ECN, BBR and L4S
10–15 minutes -
How to Learn Rate-Limiting Algorithms: Fixed Windows, Sliding Windows, Token Buckets and Distributed Limits
10–15 minutes -
How to Learn CPU-Scheduling Algorithms: FCFS, SJF, Round Robin, MLFQ, CFS and EEVDF
8–12 minutes -
How to Learn Database Crash-Recovery Algorithms: WAL, Checkpoints, ARIES, Redo and Undo
8–13 minutes -
How to Learn Database Concurrency-Control Algorithms: Two-Phase Locking, MVCC, OCC and Serializable Execution
9–13 minutes -
How to Learn Heuristic Search Algorithms: A*, Admissible Heuristics, Consistency and Memory–Optimality Trade-Offs
9–14 minutes -
How to Learn Merkle-Tree Algorithms: Hash Commitments, Inclusion Proofs, Consistency Proofs and Authenticated Data Structures
8–12 minutes -
How to Learn Matrix-Multiplication Algorithms: Classical Loops, Blocking, Strassen, GEMM and Performance Engineering
8–12 minutes -
How to Learn Stable-Matching Algorithms: Deferred Acceptance, Blocking Pairs, Proposer Optimality and Market Design
8–11 minutes -
How to Learn Regular-Expression Matching Algorithms: Thompson NFAs, DFAs, Backtracking and ReDoS Safety
8–12 minutes -
How to Learn Glaciers, Ice Sheets and the Cryosphere: From Snowfall to Ice Flow, Sea Level and Paleoclimate
6–9 minutes -
How to Learn Turbulence and Flow Instability: From Laminar Streams to Energy Cascades and Computational Fluid Dynamics
5–7 minutes -
How to Learn Smell, Taste and Flavour: From Chemical Molecules to Chemosensory Neural Coding
3–5 minutes -
How to Learn Liver Physiology, Metabolism and Detoxification: From Portal Blood to Metabolic Zonation
4–6 minutes -
How to Learn Solar Activity and Space Weather: From Sunspots to Flares, CMEs and Geomagnetic Storms
4–6 minutes -
How to Learn Volcanoes, Magma and Eruptions: From Melting Rock to Volcanic Hazards and Monitoring
4–7 minutes -
How to Learn Bone Remodeling, Calcium Homeostasis and Skeletal Physiology: From Structure to Mechanotransduction
4–6 minutes -
How to Learn Neural Memory and Synaptic Plasticity: From Experience to Lasting Neural Change
4–6 minutes -
How to Learn General-Graph Matching Algorithms: Augmenting Paths, Blossoms, Weighted Matching and Primal-Dual Reasoning
8–12 minutes -
How to Learn Cache-Replacement Algorithms: FIFO, LRU, CLOCK, ARC and Modern Page-Reclaim Policies
8–12 minutes -
How to Learn Minimum-Cost Flow Algorithms: Residual Costs, Potentials, Successive Shortest Paths and Network Simplex
8–12 minutes -
How to Learn Edit-Distance Algorithms: Dynamic Programming, Hirschberg, Bit-Parallel Methods and Wavefront Alignment
9–13 minutes -
How to Learn Memory-Allocation Algorithms: Free Lists, Buddy Allocation, Slabs, Size Classes and Fragmentation
9–13 minutes -
How to Learn Load-Balancing Algorithms: Round Robin, Least Connections, Consistent Hashing and Power of Two Choices
8–12 minutes -
How to Learn LSM-Tree Algorithms: Memtables, SSTables, Compaction and Read–Write Amplification
8–13 minutes -
How to Learn Database Join Algorithms: Nested Loops, Hash Joins, Merge Joins and Join-Order Optimisation
8–13 minutes -
How to Learn Galaxies, Redshift and the Expanding Universe: From Starlight to Modern Cosmology
5–8 minutes -
How to Learn Nuclear Fission, Fusion and Reactor Physics: From Binding Energy to Controlled Chain Reactions and Fusion Plasmas
6–9 minutes -
How to Learn Groundwater, Aquifers and Hydrogeology: From Rain Infiltration to Subsurface Flow and Water Security
6–8 minutes -
How to Learn Hemostasis, Blood Clotting and Wound Healing: From a Cut to Coagulation and Tissue Repair
5–7 minutes -
How to Learn Exoplanets and Planetary Habitability: From Transit Signals to Comparative Planetology
5–7 minutes -
How to Learn Ocean Tides and Coastal Dynamics: From Lunar Gravity to Real Shorelines
5–7 minutes -
How to Learn Plant Hormones, Tropisms and Growth Signalling: From Auxin to Developmental Control
5–8 minutes -
How to Learn Hearing and Auditory Transduction: From Sound Waves to Neural Coding
4–7 minutes -
How to Learn the Carbon Cycle and Biogeochemistry: From Photosynthesis to Oceans, Rocks and Climate Feedbacks
5–7 minutes -
How to Learn Earth’s Magnetic Field and the Geodynamo: From Compass Needles to Paleomagnetism and Core Dynamics
4–6 minutes -
How to Learn Vision and Phototransduction: From Light Entering the Eye to Neural Coding and Perception
6–8 minutes -
How to Learn the Digestive System, Nutrient Absorption and the Gut Microbiome: From Food Breakdown to Gastrointestinal Physiology
6–8 minutes -
How to Learn Atmospheric Chemistry, Ozone and Air Pollution: From Air Composition to Photochemical Reaction Networks
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.
