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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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.
