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) | Lesson No.021 | Yesterday and Past Time | 昨天与过去时间
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How to Learn Basic English (Chinese Edition) | Lesson No.022 | Work and School | 工作与学校
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How to Learn Basic English (Chinese Edition) | Lesson No.023 | Phones and Messages | 电话与信息
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How to Learn Basic English (Chinese Edition) | Lesson No.024 | Invitations and Social English | 邀请与社交英语
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How to Learn Basic English (Chinese Edition) | Lesson No.025 | Reading Signs and Notices | 标志与通知
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How to Learn Basic English (Chinese Edition) | Lesson No.026 | Forms and Personal Information | 表格与个人信息
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How to Learn Basic English (Chinese Edition) | Lesson No.027 | Problems and Solutions | 问题与解决
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How to Learn Basic English (Chinese Edition) | Lesson No.028 | Review and Real-Life English | 复习与真实英语
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How to Learn Basic English (Chinese Edition) | Lesson No.029 | Listening to Everyday English | 听懂日常英语
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How to Learn Basic English (Chinese Edition) | Lesson No.030 | Reading Short Messages and Emails | 阅读短信息与邮件
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How to Learn Basic English (Chinese Edition) | Lesson No.031 | Writing Useful Short Messages | 写实用短信息
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How to Learn Basic English (Chinese Edition) | Lesson No.032 | Speaking with Confidence and Repair | 自信口语与交流修复
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How to Learn Basic English (Chinese Edition) | Lesson No.033 | Building Sentences from Chunks | 用语块造句
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How to Learn Basic English (Chinese Edition) | Lesson No.034 | Everyday Grammar Patterns | 日常英语语法模式
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How to Learn Basic English (Chinese Edition) | Lesson No.035 | Growing Vocabulary by Word Families | 用词族扩展词汇
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How to Learn Basic English (Chinese Edition) | Lesson No.036 | From A1 to A2 | 从 A1 走向 A2
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How to Learn Basic English (Chinese Edition) | Lesson No.037 | Present Perfect for Life Experience | 用现在完成时谈经历
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How to Learn Basic English (Chinese Edition) | Lesson No.038 | Longer Everyday Conversations | 更长的日常对话
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How to Learn Basic English (Chinese Edition) | Lesson No.039 | Reading Everyday Stories and Articles | 阅读日常故事与文章
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How to Learn Basic English (Chinese Edition) | Lesson No.040 | Writing Connected Paragraphs | 写连贯段落
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How to Learn Basic English (Chinese Edition) | Lesson No.041 | Making Comparisons and Choices | 比较与选择
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How to Learn Basic English (Chinese Edition) | Lesson No.042 | Giving Reasons, Opinions and Advice | 原因、观点与建议
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How to Learn Basic English (Chinese Edition) | Lesson No.043 | Past Stories with Background and Events | 用背景与事件讲过去故事
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How to Learn Basic English (Chinese Edition) | Lesson No.044 | A2 Review and Independent English | A2 复习与独立英语
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How to Learn Basic English (Chinese Edition) | Lesson No.045 | Present Perfect with For and Since | 用 for 和 since 表持续时间
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How to Learn Basic English (Chinese Edition) | Lesson No.046 | First Conditional for Real Plans | 第一条件句与真实计划
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How to Learn Basic English (Chinese Edition) | Lesson No.047 | Relative Clauses for Clearer Description | 用关系从句补充说明
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How to Learn Basic English (Chinese Edition) | Lesson No.048 | From A2 to B1 | 从 A2 走向 B1
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How to Learn Basic English (Chinese Edition) | Lesson No.049 | Second Conditional for Hypothetical Situations | 第二条件句与假设情况
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How to Learn Basic English (Chinese Edition) | Lesson No.050 | Phrasal Verbs in Everyday English | 日常英语短语动词
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How to Learn Basic English (Chinese Edition) | Lesson No.051 | Summarising and Note-Taking | 总结与笔记
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How to Learn Basic English (Chinese Edition) | Lesson No.052 | B1 Conversation and Connected Thinking | B1 对话与连贯思考
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How to Learn Basic English (Chinese Edition) | Lesson No.053 | Present Perfect Continuous | 现在完成进行时
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How to Learn Basic English (Chinese Edition) | Lesson No.054 | Reported Speech for Everyday Information | 日常转述
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How to Learn Basic English (Chinese Edition) | Lesson No.055 | Passive Voice in Everyday English | 日常英语被动语态
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How to Learn Basic English (Chinese Edition) | Lesson No.056 | B1 Reading and Writing Integration | B1 阅读写作整合
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How to Learn Basic English (Chinese Edition) | Lesson No.057 | Past Perfect for Earlier Past | 用过去完成时表达更早的过去
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How to Learn Basic English (Chinese Edition) | Lesson No.058 | Modals of Possibility and Deduction | 可能性与推断
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How to Learn Basic English (Chinese Edition) | Lesson No.059 | Formal and Informal English | 正式与非正式英语
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How to Learn Basic English (Chinese Edition) | Lesson No.060 | B1 Review and Real-World Performance | B1 复习与真实表现
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How to Learn Basic English (Chinese Edition) | Lesson No.061 | Gerunds and Infinitives in Everyday English | 动名词与不定式
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How to Learn Basic English (Chinese Edition) | Lesson No.062 | Third Conditional for Past Hypotheticals | 第三条件句与过去假设
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How to Learn Basic English (Chinese Edition) | Lesson No.063 | Linking Ideas Across Longer Texts | 长文本中的观点连接
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How to Learn Basic English (Chinese Edition) | Lesson No.064 | From B1 to B2 | 从 B1 走向 B2
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How to Learn Basic English (Chinese Edition) | Lesson No.065 | Mixed Conditionals and Time Relationships | 混合条件句与时间关系
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How to Learn Basic English (Chinese Edition) | Lesson No.066 | Advanced Modal Meaning and Stance | 高级情态意义与立场
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How to Learn Basic English (Chinese Edition) | Lesson No.067 | Paraphrasing Without Changing Meaning | 不改变原意的改写
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How to Learn Basic English (Chinese Edition) | Lesson No.068 | B2 Discussion, Argument and Evidence | B2 讨论、论证与证据
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How to Learn Basic English (Chinese Edition) | Lesson No.069 | Advanced Relative Clauses and Reduced Clauses | 高级关系从句与简化从句
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How to Learn Basic English (Chinese Edition) | Lesson No.070 | Nominalisation and Information Density | 名词化与信息密度
Browse every published Post
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How to Learn Respiration and Gas Exchange: From Breathing to Cellular Bioenergetics
2–3 minutes -
How to Learn Spectroscopy: From Colour and Spectral Lines to Molecular Fingerprints and Stellar Physics
2–3 minutes -
How to Learn Reproduction and Development: From Life Cycles to Embryology and Developmental Biology
2–3 minutes -
How to Learn Chemical Bonding and Molecular Structure: From Attractions to Quantum Models and Materials
2–3 minutes -
How to Learn the Nervous System and Neural Signalling: From Reflexes to Neural Circuits and Coding
2–4 minutes -
How to Learn Rocks, Minerals and the Rock Cycle: From Earth Materials to Deep Time and Petrology
2–3 minutes -
How to Learn Microorganisms, Infection and Immunity: From Invisible Life to Host–Pathogen Systems
2–4 minutes -
How to Learn Enzymes and Metabolism: From Biological Catalysts to Metabolic Networks and Flux
2–3 minutes -
How to Learn Diffusion, Osmosis and Membrane Transport: From Random Molecular Motion to Electrochemical Gradients
2–3 minutes -
How to Learn Homeostasis and Feedback: From Body Balance to Control Systems and Systems Physiology
3–4 minutes -
How to Learn Gravity, Orbits and the Solar System: From Falling Objects to Orbital Mechanics
3–4 minutes -
How to Learn Radioactivity and Nuclear Decay: From Unstable Nuclei to Half-Life, Risk and Detection
2–3 minutes -
How to Learn Evolution and Natural Selection: From Variation to Population Genetics and Phylogeny
2–3 minutes -
How to Learn Pressure and Fluids: From Everyday Forces to Fluid Dynamics
3–4 minutes -
How to Learn Plate Tectonics and Earth Systems: From Moving Plates to a Dynamic Planet
3–4 minutes -
How to Learn Magnetism and Electromagnetism: From Magnets to Fields, Motors and Induction
3–4 minutes -
How to Learn Acids, Bases and pH: From Indicators to Equilibria and Buffer Systems
2–4 minutes -
How to Learn Weather and Climate: From Daily Observations to Atmospheric Science
3–5 minutes -
How to Learn Genetics and Inheritance: From Traits to Genes, Genomes and Variation
3–4 minutes -
How to Learn Photosynthesis and Respiration: From Plant Food to Cellular Energy Networks
3–4 minutes -
How to Learn Heat and Temperature: From Everyday Warmth to Thermal Physics
4–5 minutes -
How to Learn Linear Programming Algorithms: Feasible Regions, Simplex, Duality and Numerical Reality
7–10 minutes -
How to Learn the Fast Fourier Transform: DFT Structure, Divide-and-Conquer, Butterflies and Convolution
5–8 minutes -
How to Learn Bipartite Matching Algorithms: Augmenting Paths, Hopcroft–Karp and Assignment
5–8 minutes -
How to Learn Data Compression Algorithms: Entropy, Huffman Coding, Lempel–Ziv and Real-World Trade-Offs
5–8 minutes -
How to Learn Cache-Efficient Algorithms: Locality, I/O Complexity, Blocking and Cache-Oblivious Design
6–9 minutes -
How to Learn Parameterized Algorithms: FPT, Branching, Kernelization and Choosing the Right Parameter
6–9 minutes -
How to Learn NP-Completeness and Reductions: Certificates, Polynomial Time, Hardness and Proof Design
6–9 minutes -
How to Learn Number-Theoretic Algorithms: GCD, Extended Euclid, Modular Exponentiation and Primality
6–8 minutes -
How to Learn Parallel Algorithms: Work, Span, Reduce, Scan and When More Processors Actually Help
5–8 minutes -
How to Learn Suffix Arrays and LCP Arrays: String Indexing, Binary Search and Repeated Structure
5–7 minutes -
How to Learn Computational Geometry Algorithms: Orientation, Convex Hulls, Sweep Lines and Robust Predicates
5–7 minutes -
How to Learn Bloom Filters: Probabilistic Membership, False Positives and Space–Accuracy Trade-Offs
5–7 minutes -
How to Learn Cells and Living Systems: Beginner to Advanced
5–8 minutes -
How to Learn Forces and Motion: Beginner to Advanced
5–7 minutes -
How to Learn Matter and Particles: Beginner to Advanced
4–6 minutes -
How to Learn Energy in Science: Beginner to Advanced
4–7 minutes -
How to Learn Streaming Algorithms: One Pass, Small Memory and Approximate Answers
5–8 minutes -
How to Learn Online Algorithms: Decisions Without Future Knowledge and Competitive Analysis
5–8 minutes -
How to Learn Approximation Algorithms: Near-Optimal Solutions, Approximation Ratios and Proofs
5–7 minutes -
How to Learn Algorithm Correctness Proofs: Preconditions, Loop Invariants, Induction and Termination
5–7 minutes -
How to Learn Amortized Analysis: Aggregate, Accounting and Potential Methods
5–7 minutes -
How to Learn Randomized Algorithms: Random Choices, Expected Cost, Las Vegas and Monte Carlo Guarantees
4–7 minutes -
How to Learn Strongly Connected Components: Mutual Reachability, Kosaraju, Tarjan and Condensation DAGs
5–7 minutes -
How to Learn Selection Algorithms: Quickselect, Order Statistics and Median-of-Medians
5–7 minutes -
How to Learn Network Flow Algorithms: Residual Graphs, Augmenting Paths and Max-Flow Min-Cut
5–7 minutes -
How to Learn Minimum Spanning Trees: Cut Property, Kruskal, Prim and Proof of Choice
4–7 minutes -
How to Learn Topological Sorting: DAGs, Indegrees, Kahn’s Algorithm and Cycle Detection
4–6 minutes -
How to Learn Tries: Prefix Trees, Search, Autocomplete and Memory Trade-Offs
4–7 minutes -
How to Learn Backtracking Algorithms: Choose, Explore, Undo and Prune
7–10 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.
