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
-
Observation vs Inference vs Conclusion | Science Learning Guide
-
Observed, Inferred, Unknown | Marie Curie Series | How to Read Learning Evidence Carefully
-
Palm View Primary School: A Parent’s Learning Guide
-
Parenthood Tutor | Curie Series | Learning to Support a Growing Person
-
Parents’ Guide to eduKate Sengkang | What Would Help Your Family Next?
-
Pei Hwa Secondary School: A Parent’s Learning Guide
-
Percentage Practice | Choose the Base, Check Again Later
-
Personalised Mathematics Tuition Sengkang | Same Topic, Different Weak Link
-
Personalized Additional Mathematics Tuition in Punggol | Diagnose, Repair and Advance
-
Physics | Energy, Forces, Electricity, Light, Sound and Waves
-
Physiology, Neuroscience & Mechanobiology | Signals, Forces, Tissues and Organ Systems
-
Plant Science & Photosynthesis | Chloroplasts, Nutrients, Transport and Plant Decisions
-
Portcullis Guard | Hard Stops and Protected Boundaries Agent
-
Post-Secondary English Tutor | Curie Series | Language Across JC, Polytechnic and ITE
-
Post-Secondary Mathematics Tutor | Curie Series | Mathematics Across JC, Polytechnic and ITE
-
Post-Secondary Science Tutor | Curie Series | Science Across JC, Polytechnic and ITE
-
Praise That Helps and Praise That Hurts
-
Prediction Before Feedback | Marie Curie Series | What Does the Learner Expect Before Seeing the Answer?
-
Primary 1 Discovery Science Sengkang | Before Formal Science Begins
-
Primary 1 Discovery Science Sengkang | Observe, Compare & Ask Why
-
Primary 1 English Learning Guide | Beginning Reading: Phonics, Word Recognition, Fluency and Meaning
-
Primary 1 English Learning Guide | Cause and Effect in Reading: Why Things Happen, Results, Because, So and Evidence
-
Primary 1 English Learning Guide | Central Message and Lesson: Topic, Character Choice, Consequence, Change and Evidence
-
Primary 1 English Learning Guide | Collaborative Discussion: Turn-Taking, Clarification, Building on Ideas and Respectful Disagreement
-
Primary 1 English Learning Guide | Comparing Stories and Characters: Similarities, Differences, Adventures, Responses and Evidence
-
Primary 1 English Learning Guide | Comparing Two Texts: Similarities, Differences, Purpose and Evidence
-
Primary 1 English Learning Guide | Comprehension Cloze: Cohesion, Context and Whole-Text Meaning
-
Primary 1 English Learning Guide | Context Clues for Unknown Words: Pictures, Sentences, Definitions, Examples and Meaning Checks
-
Primary 1 English Learning Guide | Descriptive Writing: Observation, Sensory Detail, Precise Nouns, Verbs and Comparison
-
Primary 1 English Learning Guide | Dialogue and Punctuation: Speech, Reporting Clauses, Voice and Meaning
-
Primary 1 English Learning Guide | Email and Digital Message Writing: Purpose, Audience, Subject, Tone and Complete Information
-
Primary 1 English Learning Guide | Error Analysis, Self-Correction, Retrieval and Transfer
-
Primary 1 English Learning Guide | Explanatory Writing: How, Why, Cause, Process and Precision
-
Primary 1 English Learning Guide | Fact, Opinion, Inference and Evidence
-
Primary 1 English Learning Guide | Fiction and Nonfiction: Story, Information, Purpose, Structure, Evidence and Reading Routes
-
Primary 1 English Learning Guide | Figurative and Idiomatic Meaning in Context: Comparison, Simile, Personification and Common Idioms
-
Primary 1 English Learning Guide | Functional Writing: Notes, Messages, Instructions and Everyday Information
-
Primary 1 English Learning Guide | Grammar and Editing: Agreement, Tense, Pronouns, Connectors and Sentence Boundaries
-
Primary 1 English Learning Guide | Independent Reading: Book Choice, Response and Building a Reading Life
-
Primary 1 English Learning Guide | Independent Study Routines for English: Retrieval, Spacing, Error Return, Transfer and Planning
-
Primary 1 English Learning Guide | Information Synthesis Across Text and Visual Sources: Main Idea, Evidence and Integration
-
Primary 1 English Learning Guide | Learning Habits, Self-Correction and the Primary 2 Bridge
-
Primary 1 English Learning Guide | Listening Comprehension: Main Ideas, Details, Sequence and Change
-
Primary 1 English Learning Guide | Listening, Speaking and Early Writing
-
Primary 1 English Learning Guide | Main Topic and Key Details: What the Text Is Mostly About, Important Facts and Summary
-
Primary 1 English Learning Guide | Narrative Writing: Character, Choice, Consequence and Pacing
-
Primary 1 English Learning Guide | Nonfiction and Informational Reading: Main Idea, Structure, Comparison and Evidence
-
Primary 1 English Learning Guide | Nonfiction Text Features and Navigation: Headings, Contents, Captions, Labels, Bold Print, Icons and Menus
-
Primary 1 English Learning Guide | Opinion Writing: Claim, Reasons, Examples, Audience and Revision
-
Primary 1 English Learning Guide | Oral Communication: Reading Aloud, Conversation, Idea Development and Recovery
Browse every published Post
-
PSLE Science Reality Lab Vol No.294 | “First Image of a Black Hole” — Was This One Ordinary Camera Photograph?
12–18 minutes -
PSLE Science Reality Lab Vol No.293 | “UPF 50” — Does the Fabric Block Only 50% of UV?
10–14 minutes -
PSLE Science Reality Lab Vol No.292 | “100 W Equivalent” — Does This LED Use 100 Watts?
9–14 minutes -
PSLE Science Reality Lab Vol No.291 | “Listen to the Black Hole” — Did a Microphone Record This Sound in Space?
12–18 minutes -
PSLE Science Reality Lab Vol No.290 | “River Gauge = 3.0 m” — Is the River 3 m Deep?
15–23 minutes -
PSLE Science Reality Lab Vol No.289 | “Forest Carbon Stock = 200 tC/ha” — Did the Forest Remove 200 tC/ha From the Air This Year?
11–16 minutes -
PSLE Science Reality Lab Vol No.288 | “TDS = 250 ppm” on a Pocket Meter — Did It Directly Measure 250 mg/L of Dissolved Solids?
12–18 minutes -
PSLE Science Reality Lab Vol No.287 | “Radar Velocity = 20 m/s” — Is the Wind Actually 20 m/s in Any Direction?
12–18 minutes -
PSLE Science Reality Lab Vol No.286 | “Zero-VOC Paint” — Does That Mean No VOCs Can Ever Enter the Air?
10–16 minutes -
PSLE Science Reality Lab Vol No.285 | “Tree-Cover Loss = 500 ha” — Does That Mean 500 ha Was Permanently Deforested?
10–15 minutes -
PSLE Science Reality Lab Vol No.284 | “Coral Bleaching Alert Level 2” — Does That Mean All the Coral Is Dead?
10–15 minutes -
PSLE Science Reality Lab Vol No.283 | “1,000 Microplastic Particles per Litre” — Does That Mean 1,000 mg/L of Plastic?
11–17 minutes -
Learning Runtime Glossary | MindOS, Bolt, Student Interface and the Language of Learning Control
22–32 minutes -
PSLE Science Reality Lab Vol No.282 | “60% of the eDNA Reads Came From Species A” — Were 60% of the Animals Species A?
12–18 minutes -
PSLE Science Reality Lab Vol No.281 | “Rated EV Range = 300 km” — Will the Car Always Travel 300 km on One Charge?
11–17 minutes -
PSLE Science Reality Lab Vol No.280 | “STC 50” — Does the Wall Make Every Sound 50 dB Quieter?
11–16 minutes -
PSLE Science Reality Lab Vol No.279 | “SEER2 = 20” — Is the Air Conditioner 20% Efficient?
12–18 minutes -
PSLE Science Reality Lab Vol No.278 | “T90 Response Time = 30 s” — Is the Sensor 90% Accurate After 30 Seconds?
14–22 minutes -
PSLE Science Reality Lab Vol No.277 | “ISO 9001 Certified” — Does That Mean Every Product Was Tested and Passed?
13–19 minutes -
PSLE Science Reality Lab Vol No.276 | “Round-Trip Efficiency = 90%” — Does the Battery Keep 90% of Its Charge?
10–15 minutes -
PSLE Science Reality Lab Vol No.275 | “Industrially Compostable” — Will It Break Down in a Backyard Compost Bin?
11–16 minutes -
Secondary English Summary Tutor Sengkang | Selection, Paraphrase, Compression & Meaning Preservation
6–9 minutes -
Secondary English Oral Tutor Sengkang | Planned Response, Conversation & Spoken Interaction
5–8 minutes -
Primary Mathematics Geometry & Mensuration Tutor Sengkang | Angles, Area, Perimeter & Volume
5–7 minutes -
Secondary Biology Tutor Sengkang | Cells, Transport, Nutrition, Respiration & Genetics
5–8 minutes -
Secondary Physics Tutor Sengkang | Forces, Energy, Electricity & Waves
6–9 minutes -
Secondary Chemistry Tutor Sengkang | Particles, Equations, Acids, Metals & Calculations
7–11 minutes -
Secondary Science Experimental Skills Tutor Sengkang | Variables, Measurement, Graphs & Evaluation
7–10 minutes -
Secondary Mathematics Statistics & Probability Tutor Sengkang | Data, Chance & Interpretation
6–9 minutes -
Secondary English Editing Tutor Sengkang | Grammar, Clarity, Concision & Error Detection
7–10 minutes -
PSLE Science Reality Lab Vol No.273 | “The Diversity Index Is Higher” — Does That Simply Mean More Species Were Counted?
15–22 minutes -
Primary Mathematics Fractions, Decimals & Percentages Tutor Sengkang | Part-Whole, Ratio & Change
7–11 minutes -
PSLE Science Reality Lab Vol No.272 | “Zero Waste to Landfill” — Does That Mean the Facility Produced No Waste?
13–20 minutes -
PSLE Science Reality Lab Vol No.271 | “RMSE = 2°C” — Were All Forecasts Within 2°C of the Observations?
14–21 minutes -
PSLE Science Reality Lab Vol No.270 | “Satellite Rainfall = 25 mm” — Did a Rain Gauge Measure 25 mm at Every Point?
16–24 minutes -
Secondary Mathematics Functions & Graphs Tutor Sengkang | Linear, Quadratic & Coordinate Reasoning
7–11 minutes -
Secondary Mathematics Geometry Tutor Sengkang | Angles, Similarity, Circles & Proof
8–11 minutes -
Secondary English Continuous Writing Tutor Sengkang | Ideas, Structure, Argument & Revision
8–12 minutes -
Primary English Vocabulary Tutor Sengkang | Word Meaning, Collocations & Precise Usage
8–12 minutes -
Primary English Grammar Tutor Sengkang | Tenses, Agreement, Synthesis & Editing
8–12 minutes -
Secondary Mathematics Algebra Tutor Sengkang | Expressions, Equations, Factorisation & Transfer
10–15 minutes -
Secondary English Situational Writing Tutor Sengkang | Purpose, Audience, Register & Task Fulfilment
10–15 minutes -
Secondary English Comprehension Tutor Sengkang | Inference, Language Effect & Evidence
10–15 minutes -
Primary 5–6 Science Open-Ended Questions Tutor Sengkang | Concepts, Keywords & Cause-and-Effect
10–16 minutes -
Primary 3–5 Mathematics Word Problems Tutor Sengkang | Translation, Models & Multi-Step Reasoning
12–18 minutes -
PSLE Science Reality Lab Vol No.269 | “5-Tick Energy Label” — Does It Always Use Less Electricity Than a 4-Tick Appliance?
13–19 minutes -
PSLE Science Reality Lab Vol No.268 | “The Headline Says ‘Up 200%’” — How Big Was the Starting Amount?
12–18 minutes -
PSLE Science Reality Lab Vol No.267 | “Population Estimate = 1,200 Animals” — Were 1,200 Animals Actually Counted?
9–14 minutes -
PSLE Science Reality Lab Vol No.266 | “Above the Screening Level” — Does That Prove Harm Has Already Happened?
11–16 minutes -
PSLE English Oral Tutor Sengkang | Reading Aloud & Stimulus-Based Conversation
13–20 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.
