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 Balanced Search Trees: AVL, Red-Black Trees and Rotations
6–9 minutes -
How to Learn Binary Search Trees: Ordering Invariant, Search, Insert and Delete
6–8 minutes -
How to Learn Binary Trees and Traversals: Preorder, Inorder, Postorder and Level Order
6–9 minutes -
How to Learn String-Matching Algorithms: Brute Force, KMP, Rabin–Karp and Boyer–Moore
6–8 minutes -
How to Learn Union-Find: Connectivity, Representatives, Weighting and Path Compression
7–10 minutes -
How to Learn Heaps and Priority Queues: Invariants, Swim, Sink and Heapify
7–11 minutes -
How to Learn Hash Tables: Hash Functions, Collisions, Load Factor and Rehashing
7–11 minutes -
How to Learn Divide-and-Conquer Algorithms: Split, Solve, Combine and Analyse the Recurrence
7–10 minutes -
How to Learn Greedy Algorithms: Local Choices, Exchange Arguments and Counterexamples
7–10 minutes -
How to Learn Sorting Algorithms: From Visible Moves to Stability, Invariants and Algorithm Choice
7–11 minutes -
How to Learn Searching Algorithms: Linear Search, Binary Search and the Invariant That Makes Halving Safe
7–10 minutes -
How to Learn Dynamic Programming: State, Recurrence, Memoization and Bottom-Up Design
5–8 minutes -
How to Learn Graph Algorithms: Representation, BFS, DFS and Shortest Paths
4–7 minutes -
How to Learn Recursion: Base Cases, Smaller Problems and the Call Stack
5–7 minutes -
How to Learn Algorithms with Pseudocode: From Plain-Language Steps to Executable Logic
4–6 minutes -
How Professionals Evaluate Algorithms: Correctness, Complexity, Benchmarks and Failure Modes
2–3 minutes -
How to Learn Light, Sound and Waves: From Everyday Signals to Professional Wave Models
4–5 minutes -
How Intermediate Learners Master Algorithms: Implement, Test, Retrieve and Transfer
2–3 minutes -
How Beginners Learn Algorithms: Trace, Predict and Explain Before Coding
2–3 minutes -
How to Learn Chemical Reactions: From Visible Change to Atoms, Rates and Equilibrium
3–5 minutes -
How to Learn Algorithms from Beginner to Professional Level: A Four-Stage Learning Roadmap
3–4 minutes -
How to Learn Electricity and Circuits: From Simple Loops to Current, Voltage and Fields
3–5 minutes -
How to Learn Ecosystems: From Food Chains to Population Dynamics and Resilience
3–5 minutes -
MindOS Learning Manual: Sampling-Reasoning State | A Large Sample Can Still Represent the Wrong Population
10–14 minutes -
Bolt Performance Calibration — A Student Survey Can Measure Response Style as Well as Teaching Quality
6–10 minutes -
MindOS Learning Manual: Estimation-and-Plausibility State | An Exact Calculator Answer Can Still Be Obviously Impossible
9–13 minutes -
Bolt Performance Calibration — Five Questions From One Passage Are Not Five Independent Pieces of Evidence
5–8 minutes -
Bolt Performance Calibration — Two Observers Can Watch the Same Lesson but Attend to Different Evidence
5–8 minutes -
MindOS Learning Manual: Deductive-Reasoning State | True Premises Are Not Enough If the Conclusion Does Not Follow
9–13 minutes -
Bolt Performance Calibration — A Classroom Observation Rubric Can Miss the Teaching It Was Meant to Measure
6–9 minutes -
Bolt Performance Calibration — A Passing Total Can Hide Failure on a Non-Negotiable Component
7–11 minutes -
Bolt Performance Calibration — An Access Arrangement Is Fair Only If It Changes Access Without Changing the Assessment Objective
7–11 minutes -
Bolt Performance Calibration — A Wrong Answer Given in Two Seconds May Not Be Evidence of a Wrong Idea
6–9 minutes -
MindOS Learning Manual: Probabilistic-Reasoning State | A High Percentage Can Still Answer the Wrong Probability Question
8–12 minutes -
Bolt Performance Calibration — A Test Can Be Reliable and Still Miss What Teaching Changed
6–10 minutes -
MindOS Learning Manual: Consistency-Checking State | Two Statements Can Each Sound Right and Still Not Fit Together
7–11 minutes -
MindOS Learning Manual: Argument-Mapping State | A Good Argument Can Disappear When Its Reasons and Objections Stay Buried in Paragraphs
7–10 minutes -
MindOS Learning Manual: Evaluative-Judgement State | Seeing a Strong Example Is Not the Same as Knowing Why It Is Strong
7–11 minutes -
MindOS Learning Manual: Method-of-Loci State | A Memory Palace Helps Recall Only If You Can Walk the Route Without the Palace Building You
11–16 minutes -
MindOS Learning Manual: Source-Monitoring State | You Can Remember the Fact and Forget Where It Came From
14–21 minutes -
MindOS Learning Manual: Temporal-Contiguity State | The Right Explanation at the Wrong Time Can Still Be Hard to Learn
13–20 minutes -
MindOS Learning Manual: Feedback-Timing State | Faster Feedback Is Not Always Better Feedback
9–14 minutes -
MindOS Learning Manual: Disconfirmation State | Evidence That Agrees With You Is Not Enough
7–10 minutes -
MindOS Learning Manual: Cognitive-Offloading State | Writing It Down Can Free the Mind—and Make the Mind Stop Carrying It
7–11 minutes -
MindOS Learning Manual: Causal-Reasoning State | Two Things Moving Together Does Not Tell You What Made What Happen
7–10 minutes -
MindOS Learning Manual: Inference-Generation State | The Meaning Can Be Necessary Even When the Author Never Wrote It
7–11 minutes -
Student/Studying Interface Learning Manual: Print-Preview Interface | The Page on Screen Can Be Correct and the Printed Study Object Still Be Wrong
3–5 minutes -
Student/Studying Interface Learning Manual: Toolbar Interface | Ten Visible Tools Do Not Mean Ten Tools Belong in This Study Step
3–4 minutes -
Student/Studying Interface Learning Manual: Notification Interface | A Useful Alert Can Arrive at the Wrong Moment and Steal the Study Route
3–4 minutes -
Student/Studying Interface Learning Manual: Context-Menu Interface | The Action You Need Can Exist Without Appearing on the Screen
3–4 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.
