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
-
How to Learn Basic English (Chinese Edition) | Lesson No.071 | Listening to Implication, Attitude and Discourse | 听懂暗示、态度与篇章结构
-
How to Learn Basic English (Chinese Edition) | Lesson No.072 | B2 Reading and Writing Performance | B2 阅读写作表现
-
How to Learn Basic English (Chinese Edition) | Lesson No.073 | Inversion and Emphasis | 倒装与强调
-
How to Learn Basic English (Chinese Edition) | Lesson No.074 | Cleft Sentences and Information Focus | 分裂句与信息焦点
-
How to Learn Basic English (Chinese Edition) | Lesson No.075 | Multi-Source Synthesis and Source Positioning | 多来源综合与来源定位
-
How to Learn Basic English (Chinese Edition) | Lesson No.076 | From B2 to C1 | 从 B2 走向 C1
-
How to Learn Basic English (Chinese Edition) | Lesson No.077 | Advanced Hedging and Precision | 高级模糊限制与精确表达
-
How to Learn Basic English (Chinese Edition) | Lesson No.078 | Cohesion Across Long Arguments | 长篇论证中的衔接
-
How to Learn Basic English (Chinese Edition) | Lesson No.079 | Reading Assumptions, Bias and Framing | 阅读隐含前提、偏向与框架
-
How to Learn Basic English (Chinese Edition) | Lesson No.080 | C1 Discussion and Analytical Writing | C1 讨论与分析写作
-
How to Learn Basic English (Chinese Edition) | Lesson No.081 | Advanced Reporting Verbs and Source Distance | 高级转述动词与来源距离
-
How to Learn Basic English (Chinese Edition) | Lesson No.082 | Lexical Bundles and Academic Phraseology | 高频学术语块与短语结构
-
How to Learn Basic English (Chinese Edition) | Lesson No.083 | Listening to Nuance, Irony and Pragmatic Meaning | 听懂细微语气、反讽与语用意义
-
How to Learn Basic English (Chinese Edition) | Lesson No.084 | C1 Review and Independent Performance | C1 复习与独立表现
-
How to Learn Basic English (Chinese Edition) | Lesson No.085 | Advanced Collocation and Semantic Precision | 高级搭配与语义精度
-
How to Learn Basic English (Chinese Edition) | Lesson No.086 | Reading Complex Evidence and Method Claims | 阅读复杂证据与方法主张
-
How to Learn Basic English (Chinese Edition) | Lesson No.087 | Speaking Across Registers and Audiences | 跨语体与受众口语表达
-
How to Learn Basic English (Chinese Edition) | Lesson No.088 | From C1 Toward C2 | 从 C1 走向 C2
-
How to Learn Basic English (Chinese Edition) | Lesson No.089 | Precision in Metaphor, Analogy and Figurative Language | 比喻、类比与修辞语言的精确控制
-
How to Learn Basic English (Chinese Edition) | Lesson No.090 | Synthesising Across Disciplines | 跨学科综合
-
How to Learn Basic English (Chinese Edition) | Lesson No.091 | Advanced Editing for Meaning, Style and Register | 高级意义、风格与语体编辑
-
How to Learn Basic English (Chinese Edition) | Lesson No.092 | C2-Direction Review and Expert Communication | C2 方向复习与专家沟通
-
How to Learn Basic English (Chinese Edition) | Lesson No.093 | Negotiating Definitions, Standards and Criteria | 协商定义、标准与判据
-
How to Learn Basic English (Chinese Edition) | Lesson No.094 | Expert Listening and Multi-Layer Source Tracking | 专家听力与多层来源追踪
-
How to Learn Basic English (Chinese Edition) | Lesson No.095 | Writing Executive, Public and Technical Versions | 行政、公众与技术版本写作
-
How to Learn Basic English (Chinese Edition) | Lesson No.096 | C2-Direction Capstone and Lifelong Language Maintenance | C2 方向顶点与终身语言维护
-
How to Learn Basic English (Chinese Edition) | Lesson No.097 | Advanced Translation and Mediation Without Meaning Drift | 高级翻译与调解中的意义保持
-
How to Learn Basic English (Chinese Edition) | Lesson No.098 | Negotiation, Consensus and Productive Disagreement | 协商、共识与建设性分歧
-
How to Learn Basic English (Chinese Edition) | Lesson No.099 | Writing for Policy, Decisions and Recommendations | 政策、决策与建议写作
-
How to Learn Basic English (Chinese Edition) | Lesson No.100 | Mastery Review: From Beginner to Independent Expert English | 总复习:从零基础到独立专家英语
-
How to Learn Basic English (Chinese Edition) | Lesson No.101 | Research Reading and Verification | 研究阅读与验证
-
How to Learn Basic English (Chinese Edition) | Lesson No.102 | Communicating Uncertainty and Confidence | 表达不确定性与置信度
-
How to Learn Basic English (Chinese Edition) | Lesson No.103 | High-Stakes Professional Communication | 高风险专业沟通
-
How to Learn Basic English (Chinese Edition) | Lesson No.104 | Expert Maintenance Cycle and Deliberate Practice | 专家维护循环与刻意练习
-
How to Learn Basic English (Chinese Edition) | Lesson No.105 | Incident Reports, Postmortems and Learning Reviews | 事故报告、复盘与学习回顾
-
How to Learn Basic English (Chinese Edition) | Lesson No.106 | Explaining Models, Assumptions and Limits | 解释模型、假设与边界
-
How to Learn Basic English (Chinese Edition) | Lesson No.107 | Facilitating Meetings, Panels and Expert Q&A | 主持会议、讨论与专家问答
-
How to Learn Basic English (Chinese Edition) | Lesson No.108 | Annual Language Audit and Personal Expert Portfolio | 年度语言审计与个人专家作品集
-
How to Learn Basic English (Chinese Edition) | Lesson No.109 | Writing Playbooks, SOPs and Decision Guides | 编写操作手册、SOP 与决策指南
-
How to Learn Basic English (Chinese Edition) | Lesson No.110 | Communicating Metrics, Dashboards and Trends | 解释指标、仪表板与趋势
-
How to Learn Basic English (Chinese Edition) | Lesson No.111 | Coaching, Feedback and Performance Conversations | 教练、反馈与表现对话
-
How to Learn Basic English (Chinese Edition) | Lesson No.112 | Long-Term Expert Maintenance Review | 长期专家维护复盘
-
How to Learn Basic English (Chinese Edition) | Lesson No.113 | Writing Requirements, Specifications and Acceptance Criteria | 编写需求、规格与验收标准
-
How to Learn Basic English (Chinese Edition) | Lesson No.114 | Knowledge Handoffs, Succession and Institutional Memory | 知识交接、传承与组织记忆
-
How to Learn Basic English (Chinese Edition) | Lesson No.115 | Cross-Cultural Professional Communication | 跨文化专业沟通
-
How to Learn Basic English (Chinese Edition) | Lesson No.116 | Expert Systems Review: Language as Operational Infrastructure | 专家系统复盘:把语言作为操作基础设施
-
How to Learn Basic English (Chinese Edition) | Lesson No.117 | Communicating Risk, Controls and Assurance | 风险、控制与保证沟通
-
How to Learn Basic English (Chinese Edition) | Lesson No.118 | Writing Change Plans, Rollouts and Rollbacks | 编写变更计划、发布与回滚
-
How to Learn Basic English (Chinese Edition) | Lesson No.119 | Decision Logs, Governance and Accountability | 决策记录、治理与问责
-
How to Learn Basic English (Chinese Edition) | Lesson No.120 | Expert Maintenance Capstone: Operating in English Across Systems | 专家维护顶点:用英语跨系统运作
Browse every published Post
-
PSLE Science Reality Lab Vol No.344 | “Planet Equilibrium Temperature = 300 K” — Is the Surface Really 300 K?
9–13 minutes -
PSLE Science Reality Lab Vol No.343 | “Water Year 2026” — Did It Begin on 1 January 2026?
10–15 minutes -
PSLE Science Reality Lab Vol No.342 | “NRR 30 dB” — Will Earplugs Always Make the Sound 30 dB Quieter?
7–11 minutes -
PSLE Science Reality Lab Vol No.341 | “Water Resistant 10 Bar” — Does That Mean the Watch Is Safe for Any Activity at 100 m?
7–10 minutes -
PSLE Science Reality Lab Vol No.340 | “Battery Charge Rate = 1C” — Does That Mean Exactly One Hour to Full Charge?
7–10 minutes -
PSLE Science Reality Lab Vol No.339 | “48 MP Camera” — Does It Capture Four Times More Real Detail Than a 12 MP Camera?
8–11 minutes -
PSLE Science Reality Lab Vol No.338 | “ISO/IEC 17025 Accredited Laboratory” — Is Every Test the Lab Performs Accredited?
8–13 minutes -
PSLE Science Reality Lab Vol No.337 | “Magnitude 7 Earthquake” — Is It Just Seven Times a Magnitude 1?
8–12 minutes -
PSLE Science Reality Lab Vol No.336 | “HEPA: 99.97% at 0.3 µm” — Is 0.3 µm the Smallest Particle It Can Catch?
9–13 minutes -
PSLE Science Reality Lab Vol No.335 | “This Satellite Image Is Bright Red” — Is the Forest Really Red?
10–15 minutes -
PSLE Science Reality Lab Vol No.334 | “UL Listed” — Does That Mean the Product Can Never Fail or Be Unsafe?
9–13 minutes -
PSLE Science Reality Lab Vol No.333 | “This Paper Has a Correction” — Does That Mean the Whole Study Is Invalid?
8–12 minutes -
PSLE Science Reality Lab Vol No.332 | “This Study Was Preregistered” — Does That Mean the Result Must Be Correct?
8–12 minutes -
PSLE Science Reality Lab Vol No.331 | “SPF 50” — Does That Mean 50 Times Longer in the Sun?
8–13 minutes -
PSLE Science Reality Lab Vol No.330 | “NSF/ANSI 53 Certified Water Filter” — Does It Remove Every Contaminant?
9–13 minutes -
PSLE Science Reality Lab Vol No.329 | “Streamflow = 10th Percentile” — Is the River Flowing at 10% of Normal?
9–13 minutes -
PSLE Science Reality Lab Vol No.328 | “Fire Radiative Power = 50 MW” — Is the Whole Wildfire Producing Exactly 50 MW?
8–12 minutes -
PSLE Science Reality Lab Vol No.327 | “ENERGY STAR Score = 75” — Is the Building 75% Efficient?
9–13 minutes -
PSLE Science Reality Lab Vol No.326 | “Biodegradation = 70% in 28 Days” — Did 70% of the Object Visibly Disappear Everywhere?
13–19 minutes -
PSLE Science Reality Lab Vol No.325 | “Control = 100%” — Does 150% Mean the Treatment Had 150 Units?
12–17 minutes -
PSLE Science Reality Lab Vol No.324 | “DNA Barcode Match = 99%” — Does That Prove It Is Species A?
11–16 minutes -
PSLE Science Reality Lab Vol No.323 | “The Recorder Detected 500 Calls” — Were 500 Animals There?
11–17 minutes -
PSLE Science Reality Lab Vol No.322 | “Kills 99.9% of Germs” — Does That Mean 99.9% of Every Germ Dies in Every Use?
10–15 minutes -
PSLE Science Reality Lab Vol No.321 | “Plastic Code 1 in a Triangle” — Does That Guarantee It Can Be Recycled Here?
10–15 minutes -
PSLE Science Reality Lab Vol No.320 | “Fire Perimeter = 10,000 ha” — Did All 10,000 ha Burn?
10–15 minutes -
PSLE Science Reality Lab Vol No.319 | “NDVI = 0.8” — Is 80% of the Ground Covered by Vegetation?
11–16 minutes -
PSLE Science Reality Lab Vol No.318 | “80% Biobased Content” — Is 80% of the Whole Product’s Mass Plant Material?
9–14 minutes -
PSLE Science Reality Lab Vol No.317 | “Planetary Kp = 7” — Is Earth’s Magnetic Field Seven Times More Disturbed Than at Kp 1?
9–13 minutes -
PSLE Science Reality Lab Vol No.316 | “Water Storage Anomaly = −10 cm” — Did the Groundwater Table Fall by 10 cm?
10–15 minutes -
PSLE Science Reality Lab Vol No.315 | “10-10-10 Fertilizer” — Is It 10% Nitrogen, 10% Elemental Phosphorus and 10% Elemental Potassium?
9–14 minutes -
PSLE Science Reality Lab Vol No.314 | “Sea-Surface Height Anomaly = +10 cm” — Is the Ocean 10 cm Higher Everywhere?
11–17 minutes -
PSLE Science Reality Lab Vol No.313 | “Cloud Optical Thickness = 20” — Is the Cloud 20 km Thick?
10–16 minutes -
PSLE Science Reality Lab Vol No.312 | “Leaf Area Index = 3” — Does That Mean Three Leaves per Square Metre or 300% Ground Cover?
11–17 minutes -
PSLE Science Reality Lab Vol No.311 | “Transit Depth = 1%” — Is the Planet 1% as Wide as Its Star?
10–15 minutes -
PSLE Science Reality Lab Vol No.310 | “CO₂ = 800 ppm” — Is That 800 mg of CO₂ per Cubic Metre?
9–13 minutes -
PSLE Science Reality Lab Vol No.309 | “20 Heating Degree Days” — Were There 20 Cold Days?
8–11 minutes -
PSLE Science Reality Lab Vol No.308 | “WBGT = 30°C” — Did One Thermometer Measure 30°C Air?
8–12 minutes -
PSLE Science Reality Lab Vol No.307 | “Noise Dose = 100%” — Is the Sound Level 100 dBA?
9–13 minutes -
PSLE Science Reality Lab Vol No.306 | “Base Peak = 100” — Is the Sample 100% That Fragment?
10–15 minutes -
PSLE Science Reality Lab Vol No.305 | “1000× Magnification” — Does That Mean 1000× More Detail?
9–14 minutes -
PSLE Science Reality Lab Vol No.304 | “RSD = 2%” — Does That Mean the Method Is 98% Accurate?
10–14 minutes -
PSLE Science Reality Lab Vol No.303 | “SPAD = 40” — Is the Leaf 40% Chlorophyll?
11–17 minutes -
PSLE Science Reality Lab Vol No.302 | “OD600 = 1.0” — Does That Mean Exactly One Billion Cells per Millilitre?
11–17 minutes -
PSLE Science Reality Lab Vol No.301 | “Passed 1,000 Hours of Salt Spray” — Does That Mean 1,000 Hours of Real-World Life?
10–15 minutes -
PSLE Science Reality Lab Vol No.300 | “Geiger Counter = 120 CPM” — Is That 120 µSv/h of Radiation Dose?
11–17 minutes -
PSLE Science Reality Lab Vol No.299 | “Calibration Chart: R² = 0.99” — Is the Method 99% Accurate?
13–19 minutes -
PSLE Science Reality Lab Vol No.298 | “Catch per Unit Effort Went Up” — Does That Prove There Are More Fish?
11–16 minutes -
PSLE Science Reality Lab Vol No.297 | “Treadwear 400” — Will the Tire Last Exactly Four Times as Long on Any Road?
10–15 minutes -
PSLE Science Reality Lab Vol No.296 | “9H Pencil Hardness” — Is This Coating as Hard as Mohs 9?
10–16 minutes -
PSLE Science Reality Lab Vol No.295 | “Sensor Sensitivity = 20 mV/°C” — Is the Sensor 20% Accurate?
12–18 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.
