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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Primary 6 English Learning Guide | Tense and Aspect: Time, Sequence and Meaning
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Primary 6 English Learning Guide | Text Structure, Main Idea and Paragraph Function
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Primary 6 English Learning Guide | Verb Patterns: Gerunds, Infinitives and Complement Control
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Primary 6 English Learning Guide | Viewpoint, Character Voice and Perspective in Reading
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Primary 6 English Learning Guide | Visual Text: Purpose, Audience, Layout and Evidence
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Primary 6 English Learning Guide | Visual Text: Small Print, Conditions, Numbers and Persuasion
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Primary 6 English Learning Guide | Vocabulary in Context, Collocation and Vocabulary Cloze
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Primary 6 English Learning Guide | Vocabulary in Context, Language Effect and Tone
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Primary 6 English Learning Guide | Vocabulary, Grammar, Synthesis, Cloze and Editing
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Primary 6 English Learning Guide | Writing for Purpose, Audience, Situational Writing and Continuous Writing
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Primary 6 English Sengkang | The Voyage of Water
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Primary 6 English Sengkang | Why 3-Pax Helps Examination Recovery
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Primary 6 English Tuition Centre Sengkang | Use Every Paper as Telemetry
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Primary 6 English Tuition Sengkang | PSLE English Preparation & Exam Control
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Primary 6 English Tutor | Curie Series | Integration, PSLE and the Handover to Secondary English
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Primary 6 English | When Language Becomes Examination Performance | Darwin × Voyage
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Primary 6 Mathematics Learning Guide | Age Problems and Constant-Difference Reasoning Across Time
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Primary 6 Mathematics Learning Guide | Algebra, Unknowns, Expressions and Simple Equations
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Primary 6 Mathematics Learning Guide | Angles in Geometric Figures and Shape Properties
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Primary 6 Mathematics Learning Guide | Applications, Assumptions and Model Limits
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Primary 6 Mathematics Learning Guide | Assumption Method, Replacement Difference and All-One-Type Reasoning
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Primary 6 Mathematics Learning Guide | Average and Data Relationships
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Primary 6 Mathematics Learning Guide | Case Splitting and Decision Trees
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Primary 6 Mathematics Learning Guide | Circles, Composite Figures and Volume
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Primary 6 Mathematics Learning Guide | Conditional Ratio Problems: If-Then Changes, Ratio Constraints and Scenario Reconstruction
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Primary 6 Mathematics Learning Guide | Connecting Concepts Across Topics
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Primary 6 Mathematics Learning Guide | Constant Part Problems and Changing Ratios
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Primary 6 Mathematics Learning Guide | Constant Total Problems and Internal Transfer
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Primary 6 Mathematics Learning Guide | Constraints, Bounds and Feasibility
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Primary 6 Mathematics Learning Guide | Container and Content Problems: Fixed Base Area, Water-Level Change and Volume Conservation
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Primary 6 Mathematics Learning Guide | Data Displays, Graphs and Statistical Interpretation
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Primary 6 Mathematics Learning Guide | Deductive Reasoning and Logical Chains
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Primary 6 Mathematics Learning Guide | Double-IF Problems and Two-Scenario Reasoning
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Primary 6 Mathematics Learning Guide | Drawing Diagrams and Representation Switching
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Primary 6 Mathematics Learning Guide | Elimination Method: Cancelling Equal Quantities Across Paired Conditions
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Primary 6 Mathematics Learning Guide | Equal Fractions and Common-Numerator Reasoning
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Primary 6 Mathematics Learning Guide | Equal Stage Problems and End-State Reconstruction
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Primary 6 Mathematics Learning Guide | Everything Changed Problems and Units-and-Parts Reasoning
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Primary 6 Mathematics Learning Guide | Excess-and-Shortage Problems and Fixed-Total Grouping
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Primary 6 Mathematics Learning Guide | Folded Shapes, Creases and Hidden-Angle Visualisation
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Primary 6 Mathematics Learning Guide | Fractions, Decimals, Percentages and Ratio as Equivalent Representations
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Primary 6 Mathematics Learning Guide | Fractions, Division and Part-Whole Reasoning
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Primary 6 Mathematics Learning Guide | Gap-and-Difference Problems and Comparison Change
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Primary 6 Mathematics Learning Guide | Grouping, Number × Value and Equal-Group Reconstruction
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Primary 6 Mathematics Learning Guide | Guess, Check, Improve and Assumption Testing
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Primary 6 Mathematics Learning Guide | Information Sufficiency and Missing Data
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Primary 6 Mathematics Learning Guide | Mathematical Communication, Working and Justification
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Primary 6 Mathematics Learning Guide | Mathematical Modelling: From Real Situation to Model and Back
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Primary 6 Mathematics Learning Guide | Measurement Units, Conversion and Dimensional Reasoning
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Primary 6 Mathematics Learning Guide | Metacognition, Self-Monitoring and Strategy Control
Browse every published Post
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PSLE Science Reality Lab Vol No.580 | “Freezing Level = 3,000 m” — Is Everything Above That Height Frozen?
9–13 minutes -
Advanced Science Tutorials | Science Homework Help for Parents Without Giving the Answer
11–16 minutes -
PSLE Science Reality Lab Vol No.579 | “RONI = +0.8°C” — Is the Whole Tropical Pacific 0.8°C Warmer?
10–15 minutes -
Advanced Additional Mathematics Tutorials | A-Math Functions and Graphs — The Hidden Spine From Quadratics to Calculus
10–15 minutes -
Advanced Additional Mathematics Tutorials | Why A-Math Feels Hard After Secondary 2 — The Seven Weak Links Behind Falling Marks
11–16 minutes -
Advanced Mathematics Tutorials | Secondary G1, G2 and G3 Mathematics: Algebra, Problem Solving and the Secondary Reset
20–29 minutes -
Advanced Science Tutorials | 12-Week PSLE Science Revision Plan for Parents and Primary 6 Students
13–19 minutes -
Advanced English Tutorials | PSLE to SEC G1, G2 and G3 English: A Parent Roadmap
17–26 minutes -
Advanced Mathematics Tutorials | G1, G2 and G3 Mathematics Explained for Secondary School Parents
17–26 minutes -
Advanced Mathematics Tutorials | How to Survive PSLE Mathematics Without Turning Revision Into Panic
12–18 minutes -
Advanced English Tutorials | How to Improve English Writing Skills Step by Step
19–28 minutes -
Advanced Additional Mathematics Tutorials | How to Prepare for Secondary 3 A-Math in Secondary 2
10–15 minutes -
Advanced Additional Mathematics Tutorials | SEC G1, G2 and G3 Mathematics Pathways: Where Additional Mathematics Fits
9–14 minutes -
Advanced Science Tutorials | How to Study Science Effectively Without Re-reading Notes
18–27 minutes -
Advanced Mathematics Tutorials | Primary 4 Mathematics: Fractions, Word Problems and the First Big Jump
12–18 minutes -
Advanced English Tutorials | Reading Comprehension Strategies Parents Can Use at Home
17–26 minutes -
Advanced Additional Mathematics Tutorials | Primary 1–6 Mathematics Skills That Later Power A-Math
10–15 minutes -
Advanced Additional Mathematics Tutorials | From PSLE Mathematics to A-Math: The Foundation Parents Should Build Before Secondary 3
11–17 minutes -
Advanced English Tutorials | How to Improve English at Home From Primary 1 to Primary 6
21–31 minutes -
Advanced Mathematics Tutorials | Primary 1 Mathematics Foundations That Prevent Later Gaps
13–19 minutes -
PSLE Science Reality Lab Vol No.578 | “50.0 ± 0.5” — Is the True Value Guaranteed to Be Between 49.5 and 50.5?
8–11 minutes -
PSLE Science Reality Lab Vol No.577 | “Bootstrap Support = 95” — Is That a 95% Chance the Branch Is True?
8–12 minutes -
PSLE Science Reality Lab Vol No.576 | “Volcanic Ash Polygon” — Is Ash Present Everywhere Inside the Shape?
8–12 minutes -
PSLE Science Reality Lab Vol No.575 | “This Soil Map Polygon Is Labelled Loam” — Is Every Spot Inside It the Same Soil?
9–14 minutes -
PSLE Science Reality Lab Vol No.574 | “This Electron Micrograph Is Blue and Green” — Were the Cells Really Those Colours?
16–24 minutes -
PSLE Science Reality Lab Vol No.573 | “34-kt Wind Radius = 150 nm NE” — Does Every Place Within 150 nm Have 34-kt Winds?
11–16 minutes -
PSLE Science Reality Lab Vol No.572 | “This Star Has Eight Bright Spikes” — Are Those Real Beams Shooting From the Star?
12–18 minutes -
PSLE Science Reality Lab Vol No.571 | “The Air-Quality Map Is Orange Here” — Was AQI Measured at Every Point in the Orange Area?
13–19 minutes -
PSLE Science Reality Lab Vol No.570 | “Flame Pictogram” — Does That Mean the Chemical Will Catch Fire Immediately?
16–24 minutes -
PSLE Science Reality Lab Vol No.569 | “Peak Area = 92%” — Is the Sample Automatically 92% Pure?
16–24 minutes -
PSLE Science Reality Lab Vol No.568 | “Magnetic Declination = 12° East” — Is the Compass 12% Wrong?
11–16 minutes -
PSLE Science Reality Lab Vol No.567 | “This Area Is Blue on the Geologic Map” — Is the Rock Really Blue?
13–19 minutes -
PSLE Science Reality Lab Vol No.566 | “Satellite Map Shows an Algal Bloom” — Does That Prove Toxin Is Present at Every Coloured Pixel?
18–27 minutes -
PSLE Science Reality Lab Vol No.565 | “Satellite Shows Smoke Overhead” — Does That Prove Ground-Level PM2.5 Is High There?
11–16 minutes -
PSLE Science Reality Lab Vol No.564 | “Tsunami Warning” — Does That Mean a Destructive Wave Has Already Been Observed?
10–16 minutes -
PSLE Science Reality Lab Vol No.563 | “Cloud Mask: Confident Clear” — Does That Prove the Pixel Was Completely Cloud-Free?
12–18 minutes -
PSLE Science Reality Lab Vol No.562 | “Lake Residence Time = 10 Years” — Does Every Water Molecule Stay for Ten Years?
18–27 minutes -
PSLE Science Reality Lab Vol No.561 | “This Bond Line Is Twice as Long in the Molecule Drawing” — Is the Real Bond Twice as Long?
12–18 minutes -
PSLE Science Reality Lab Vol No.560 | “These Two Species Sit Next to Each Other at the Tips” — Are They the Closest Relatives?
13–19 minutes -
PSLE Science Reality Lab Vol No.559 | “Peak Wave Period = 8 s” — Did Every Wave Arrive Exactly Eight Seconds Apart?
13–19 minutes -
PSLE Science Reality Lab Vol No.558 | “Depth to Water = 12 m” — Is the Aquifer Only 12 m Deep?
10–14 minutes -
PSLE Science Reality Lab Vol No.557 | “Genome Assembly N50 = 1 Mb” — Is the Genome 50% Accurate or Complete?
8–12 minutes -
PSLE Science Reality Lab Vol No.556 | “Human Reference Genome” — Is This the DNA Sequence of One Average Person?
10–14 minutes -
PSLE Science Reality Lab Vol No.555 | “The Satellite Map Shows Rainbow Rings” — Did the Ground Form Real Coloured Bands?
12–19 minutes -
PSLE Science Reality Lab Vol No.554 | “The Arrow Is Longer” — Does That Mean the Flow Is Faster?
13–20 minutes -
PSLE Science Reality Lab Vol No.553 | “Thermostat Set to 22°C” — Is the Whole Room Exactly 22°C?
14–21 minutes -
PSLE Science Reality Lab Vol No.552 | “10,000 Occurrence Records” — Were 10,000 Individual Organisms Counted?
10–15 minutes -
PSLE Science Reality Lab Vol No.551 | “QPF = 25 mm” — Does That Mean a 25% Chance of Rain or 25 mm Falling Right Now?
10–16 minutes -
PSLE Science Reality Lab Vol No.546 | “Both Centrifuges Ran at 10,000 rpm” — Did the Samples Experience the Same Centrifugal Effect?
11–17 minutes -
PSLE Science Reality Lab Vol No.545 | “This Road Line Is 1 mm Wide on the Map” — Is the Real Road Exactly That Wide at Scale?
14–21 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.
