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
2756 results found
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Primary 5 Science Tuition | Why Do Plants Wilt Without Water?
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Primary 5 Science Tuition | Why Do We Breathe Faster After Exercise?
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Primary 5 Science Tuition | Why Do Wet Clothes Dry Faster? Evaporation, Heat, Wind and Surface Area
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Primary 5 Science Tuition | Why Does a Bulb Light Only in a Complete Circuit?
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Primary 5 Science Tutor | Curie Series | Integrated Systems, Variables and Evidence
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Primary 5 Science | When Science Becomes a Systems Problem | Darwin × Voyage
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Primary 5 to Primary 6 Mathematics Bridge | Algebra & Unknowns from Number Sentences, Models & Inverse Thinking
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Primary 5 to Primary 6 Mathematics Bridge | Average from Totals, Equal Sharing & Data
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Primary 5 to Primary 6 Mathematics Bridge | Ratio from Fractions, Rate & Multiplicative Comparison
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Primary 5 to Primary 6 Mathematics Bridge | Speed from Rate, Time & Unit Conversion
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Primary 5 Tuition Sengkang | Building the PSLE Engine Before the Final Year
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Primary 5 → Primary 6 Mathematics Bridge | Percentage Difference, Percentage Change & Changing Reference Bases
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Primary 6 English Learning Guide | Articles, Determiners and Quantifiers: Reference, Quantity and Scope
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Primary 6 English Learning Guide | Cause, Contrast, Sequence and Comparison: Reading Logical Relationships
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Primary 6 English Learning Guide | Composition Sentence Craft, Cohesion and Paragraph Flow
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Primary 6 English Learning Guide | Comprehension Cloze: Cohesion, Context and Whole-Text Meaning
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Primary 6 English Learning Guide | Comprehension Question Types and Answer Precision
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Primary 6 English Learning Guide | Continuous Writing: Picture Stimulus Selection and Integration
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Primary 6 English Learning Guide | Continuous Writing: Topic, Plot and Revision
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Primary 6 English Learning Guide | Exam Error Analysis, Correction and Transfer
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Primary 6 English Learning Guide | Exam Simulation, Stamina, Time Control and Recovery
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Primary 6 English Learning Guide | Final PSLE Revision and the Secondary 1 Handover
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Primary 6 English Learning Guide | Grammar Cloze, Editing and Sentence Control
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Primary 6 English Learning Guide | Grammar for Meaning: Modality, Conditionals, Reported Speech and Passive Voice
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Primary 6 English Learning Guide | Independent Weekly Revision: Retrieval, Spacing, Transfer and Self-Checking
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Primary 6 English Learning Guide | Inference Across Paragraphs: Motive, Change and Evidence Boundaries
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Primary 6 English Learning Guide | Listening Comprehension: Preview, Evidence and Distractor Control
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Primary 6 English Learning Guide | Listening Comprehension: Selective Note-Taking, Numbers, Speakers and Change Signals
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Primary 6 English Learning Guide | Listening, Oral, Examination Control and the Secondary 1 Bridge
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Primary 6 English Learning Guide | Metacognition, Self-Checking and Independent Exam Control
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Primary 6 English Learning Guide | Non-Fiction Reading: Claims, Evidence, Fact, Opinion and Reliability
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Primary 6 English Learning Guide | Open-Ended Answer Editing: Precision, Completeness and Meaning
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Primary 6 English Learning Guide | Oral Communication: Reading Aloud and Stimulus-based Conversation
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Primary 6 English Learning Guide | Oral on Unfamiliar Topics: Reasoning Without Specialised Knowledge or Prepared Scripts
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Primary 6 English Learning Guide | Paper 2 Mixed-Skill Switching and Diagnostic Practice
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Primary 6 English Learning Guide | Phrasal Verbs, Idioms and Fixed Expressions: Meaning, Register and Natural Use
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Primary 6 English Learning Guide | Prepositions and Fixed Collocations: Time, Place, Movement and Natural Usage
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Primary 6 English Learning Guide | PSLE English Myths and False Rules: What the 2026 Examination Actually Requires
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Primary 6 English Learning Guide | Punctuation and Sentence Boundaries: Commas, Apostrophes and Dialogue
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Primary 6 English Learning Guide | Question Command Words and Answer Forms
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Primary 6 English Learning Guide | Reading Aloud: Phrasing, Stress, Pace, Pronunciation and Recovery
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Primary 6 English Learning Guide | Reading Under Time: Passage Navigation, Evidence and Recovery
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Primary 6 English Learning Guide | Reading, Comprehension, Inference and Evidence
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Primary 6 English Learning Guide | Reference, Pronouns and Cohesion: Tracking Meaning Across a Passage
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Primary 6 English Learning Guide | Situational Writing: Content Points and Tone
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Primary 6 English Learning Guide | Situational Writing: Source-Pack Selection, Transformation and Task Accuracy
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Primary 6 English Learning Guide | Spelling, Morphology and Word Formation in Editing
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Primary 6 English Learning Guide | Stimulus-Based Conversation: Opinion, Reason, Example, Follow-Up and Recovery
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Primary 6 English Learning Guide | Subject–Verb Agreement: Finding the True Subject
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Primary 6 English Learning Guide | Synthesis and Transformation: Meaning Preservation
Browse every published Post
3746 results found
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PSLE Science Reality Lab Vol No.420 | “Aboveground Biomass = 150 Mg/ha” — Did Scientists Cut Down and Weigh Every Tree?
9–13 minutes -
PSLE Science Reality Lab Vol No.419 | “River Discharge = 120 m³/s at 06:00” — Was 120 m³/s Directly Measured at That Exact Moment?
11–16 minutes -
PSLE Science Reality Lab Vol No.418 | “Net Weight 500 g” — Was Every Pack Filled to Exactly 500.0 g?
10–15 minutes -
PSLE Science Reality Lab Vol No.417 | “The Microscope Image Is Purple and Pink” — Were the Cells Naturally Those Colours?
9–14 minutes -
PSLE Science Reality Lab Vol No.416 | “This Hillshade Is Dark on One Side” — Was That Slope in Shadow When the Data Were Collected?
10–14 minutes -
PSLE Science Reality Lab Vol No.415 | “Waterproof Fabric = 10,000 mm Hydrostatic Head” — Can You Take It 10 m Underwater?
11–16 minutes -
PSLE Science Reality Lab Vol No.414 | “Noise Cancelling = Up to 40 dB” — Will Every Sound Become 40 dB Quieter?
12–18 minutes -
PSLE Science Reality Lab Vol No.413 | “Washing Machine Capacity = 10 kg” — Does That Mean 10 kg of Any Laundry on Any Cycle?
10–15 minutes -
PSLE Science Reality Lab Vol No.412 | “Calibration Due: 30 September” — Is the Instrument Guaranteed Accurate Until That Date?
10–15 minutes -
PSLE Science Reality Lab Vol No.411 | “Dehumidifier Capacity = 20 L/day” — Will It Remove 20 Litres From the Room Every Day?
10–15 minutes -
PSLE Science Reality Lab Vol No.410 | “Microwave Oven = 1000 W” — Does It Draw Exactly 1000 W From the Wall?
8–12 minutes -
PSLE Science Reality Lab Vol No.409 | “12-Bit Satellite Data = 4096 Levels” — Is It 16 Times More Accurate Than 8-Bit Data?
8–12 minutes -
PSLE Science Reality Lab Vol No.408 | “Echo Sounder Says 20 m” — Is the Seabed Exactly 20 m Below the Water Surface?
8–12 minutes -
PSLE Science Reality Lab Vol No.407 | “NIST Traceable” — Did NIST Test, Approve or Certify This Instrument?
8–12 minutes -
PSLE Science Reality Lab Vol No.406 | “Error = +0.3°C; Correction = −0.3°C” — Why Do the Signs Point Opposite Ways?
12–18 minutes -
PSLE Science Reality Lab Vol No.405 | “ISO Class 5 Cleanroom” — Does Class 5 Mean Only Five Particles Are Allowed in the Room?
12–18 minutes -
PSLE Science Reality Lab Vol No.404 | “Magnitude 6.1, Then 5.8” — Did the Earthquake Become Smaller After It Happened?
11–16 minutes -
PSLE Science Reality Lab Vol No.403 | “Brightness Temperature = −43°C” — Did a Thermometer in the Cloud Measure −43°C?
14–21 minutes -
PSLE Science Reality Lab Vol No.402 | “Sound Power Level = 90 dB” — Will a Sound Meter Read 90 dB Wherever You Stand?
8–13 minutes -
PSLE Science Reality Lab Vol No.401 | “Gas Flow = 10 Standard L/min” — Are Exactly 10 Litres Passing Each Minute at the Actual Temperature and Pressure?
8–12 minutes -
PSLE Science Reality Lab Vol No.400 | “Battery Nominal Voltage = 3.6 V” — Is the Cell Always at 3.6 V?
8–12 minutes -
PSLE Science Reality Lab Vol No.399 | “2× Vertical Exaggeration” — Are the Slopes Really Twice as Steep?
8–13 minutes -
PSLE Science Reality Lab Vol No.398 | “Pan-Sharpened to 15 m” — Were All the Colour Bands Measured at 15 m?
10–15 minutes -
PSLE Science Reality Lab Vol No.397 | “The Trip Blank Contained Benzene” — Does That Prove the River Sample Contained Benzene?
10–15 minutes -
How to Improve Reading | Build Meaning, Test Inference, Expand Vocabulary and Read With Purpose
11–17 minutes -
PSLE Science Reality Lab Vol No.396 | “Both Thermal Images Show the Roof in Red” — Is It the Same Temperature in Both?
10–15 minutes -
PSLE Science Reality Lab Vol No.395 | “30 m Satellite Data Resampled to 10 m” — Did It Gain New 10 m Detail?
11–17 minutes -
PSLE Science Reality Lab Vol No.394 | “Proof Tested to 125% of Rated Load” — Does That Mean It Breaks at 125%?
8–12 minutes -
PSLE Science Reality Lab Vol No.393 | “Ensemble Mean Forecast” — Is That the One Most Likely Weather Scenario?
8–12 minutes -
PSLE Science Reality Lab Vol No.392 | “Mean ± SEM” — Do Those Tiny Error Bars Show How Much the Individual Results Varied?
8–12 minutes -
PSLE Science Reality Lab Vol No.391 | “Dissolved Metal = 8 µg/L” — Is That the Total Metal in the Water?
9–14 minutes -
Primary Science Cycles & Systems Tutor Sengkang | Life Cycles, Water, Plants & Interdependence
3–5 minutes -
Primary Science Heat & Light Tutor Sengkang | Temperature, Transfer, Shadows & Reflection
3–4 minutes -
Additional Mathematics Trigonometry Tutor Sengkang | Identities, Equations, Graphs & Radians
3–5 minutes -
Secondary English Grammar Tutor Sengkang | Tense, Clauses, Agreement, Cohesion & Sentence Control
3–5 minutes -
PSLE English Situational Writing Tutor Sengkang | Task Fulfilment, Audience, Purpose & Source Use
4–6 minutes -
Primary Science Energy & Forces Tutor Sengkang | Transfer, Motion, Friction, Magnets & Systems
6–9 minutes -
Additional Mathematics Calculus Tutor Sengkang | Differentiation, Integration, Tangents & Rates of Change
6–9 minutes -
Secondary English Vocabulary Tutor Sengkang | Academic Words, Collocations, Nuance & Transfer
6–9 minutes -
PSLE English Listening Comprehension Tutor Sengkang | Main Ideas, Details, Inference & Evaluation
6–9 minutes -
Primary Mathematics Ratio, Rate & Speed Tutor Sengkang | Relationships, Units & Multi-Step Problems
5–8 minutes -
PSLE Science Reality Lab Vol No.390 | “Checked Against Ground Truth” — Does Ground Truth Mean Error-Free Truth?
10–15 minutes -
PSLE Science Reality Lab Vol No.389 | “Model Run: 00Z; Valid: 12Z” — Which Time Does the Forecast Describe?
10–15 minutes -
PSLE Science Reality Lab Vol No.388 | “Accuracy: ±1% Full Scale” — Is That ±1% of Every Reading?
10–15 minutes -
PSLE Science Reality Lab Vol No.387 | “Satellite Data: Level 3” — Does Level 3 Mean It Is More Accurate Than Level 2?
12–19 minutes -
PSLE Science Reality Lab Vol No.386 | “Earthquake Alert = Red” — Does Red Mean the Earthquake Had the Biggest Magnitude?
9–13 minutes -
PSLE Science Reality Lab Vol No.385 | “40% Chance of Above-Normal Rainfall” — Does That Mean 40% More Rain?
8–13 minutes -
PSLE Science Reality Lab Vol No.384 | “1 m DEM” — Are the Elevation Values Accurate to 1 m?
9–14 minutes -
PSLE Science Reality Lab Vol No.383 | “Storm-Surge Map Says 6 ft” — Is 6 ft the Exact Flood Depth That Will Happen There?
11–16 minutes -
PSLE Science Reality Lab Vol No.382 | “The Probe Says 40°C” — Could the Act of Measuring Have Changed the Temperature?
8–12 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.
