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 6 Mathematics Learning Guide | Money Applications: Discount, GST and Interest
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Primary 6 Mathematics Learning Guide | Multi-Step Word Problems and Model Selection
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Primary 6 Mathematics Learning Guide | Multiple Methods, Verification and Comparing Solution Routes
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Primary 6 Mathematics Learning Guide | Number Sense, Approximation, Estimation and Reasonableness
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Primary 6 Mathematics Learning Guide | Patterns, Rules, Generalisation and Invariant Thinking
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Primary 6 Mathematics Learning Guide | Primary 6 to Secondary 1 Mathematics Handover
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Primary 6 Mathematics Learning Guide | PSLE Error Analysis, Pacing and Exam Control
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Primary 6 Mathematics Learning Guide | Question Decomposition and Subgoals
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Primary 6 Mathematics Learning Guide | Rate, Unit Rate and Quantity per Unit
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Primary 6 Mathematics Learning Guide | Ratio, Percentage and Multiplicative Change
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Primary 6 Mathematics Learning Guide | Remainder Branching and Fractions of a Changing Whole
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Primary 6 Mathematics Learning Guide | Repeated Identity, Chained Ratios and Shared Middle Quantities
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Primary 6 Mathematics Learning Guide | Reversibility and Inverse Thinking
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Primary 6 Mathematics Learning Guide | Selecting Relevant Information and Filtering Distractors
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Primary 6 Mathematics Learning Guide | Simplifying Problems and Equivalent Structure
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Primary 6 Mathematics Learning Guide | Stack Model, Split Model and Two-Dimensional Visual Reasoning
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Primary 6 Mathematics Learning Guide | Synthesis Problems and End-to-End Solution Architecture
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Primary 6 Mathematics Learning Guide | Systematic Listing and Case Organisation
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Primary 6 Mathematics Learning Guide | Three-Quantity Comparison Models and Multi-Bar Alignment
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Primary 6 Mathematics Learning Guide | Transfer to Novel and Unfamiliar Problems
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Primary 6 Mathematics Learning Guide | Unit Overlay Strategy: Superimposing Equivalent Units and Shared Sections
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Primary 6 Mathematics Learning Guide | Working Backwards and Before–After Reasoning
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Primary 6 Mathematics Learning Hub | PSLE Mathematics Guides
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Primary 6 Mathematics Sengkang | PSLE Exam-Control Checklist
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Primary 6 Mathematics Sengkang | The Voyage of Water
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Primary 6 Mathematics Tuition Sengkang | 2026 PSLE Math & Exam Control
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Primary 6 Mathematics Tutor | Curie Series | Integration, PSLE and the Handover to Algebra
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Primary 6 PSLE Revision Timetable Template (downloadable)
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Primary 6 Science Learning Guide | Adaptation, Unfavourable Environments, Movement & Survival for PSLE
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Primary 6 Science Learning Guide | Alternative Explanations, Contradictions & Anomaly Resolution for PSLE
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Primary 6 Science Learning Guide | Analogy, Similarity & Transfer Boundaries for PSLE
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Primary 6 Science Learning Guide | Boundary Cases, Exceptions & Edge Conditions for PSLE
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Primary 6 Science Learning Guide | Cause, Mechanism, Explanation Chains & Evidence for PSLE
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Primary 6 Science Learning Guide | Claims, Evidence, Reasoning & Counterclaims for PSLE
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Primary 6 Science Learning Guide | Concepts, Systems, Interactions & Energy
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Primary 6 Science Learning Guide | Confidence, Uncertainty, Anomalies & Strength of Evidence for PSLE
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Primary 6 Science Learning Guide | Confounding Variables, Controls & Experimental Validity for PSLE
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Primary 6 Science Learning Guide | Constructing Tables, Graphs & Data Displays for PSLE
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Primary 6 Science Learning Guide | Data, Graphs, Diagrams & Evidence
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Primary 6 Science Learning Guide | Digestive System: Digestion vs Absorption, Food Path, Small Intestine, Large Intestine & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Diversity, Classification, Life Cycles & Reproduction for PSLE
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Primary 6 Science Learning Guide | Electrical Circuits: Current, Series vs Parallel, Switches, Brightness & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Electrical Systems, Circuits & Energy for PSLE
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Primary 6 Science Learning Guide | Energy Conversion: Trace Energy Through a System
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Primary 6 Science Learning Guide | Energy in Food: The Sun, Plants, Animals, Respiration & Energy Pathways for PSLE
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Primary 6 Science Learning Guide | Evidence Synthesis Across Text, Tables, Graphs & Diagrams for PSLE
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Primary 6 Science Learning Guide | Exam Timing, Question Triage, Recovery & Final Checking for PSLE
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Primary 6 Science Learning Guide | Food Chains & Food Webs: Arrow Direction, Producers, Consumers, Decomposers, Population Changes & Common PSLE Concept Traps
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Primary 6 Science Learning Guide | Forces: Friction, Gravity and Elastic Spring Force
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Primary 6 Science Learning Guide | Heat vs Temperature, Thermal Energy Transfer, State Changes & Common PSLE Concept Traps
Browse every published Post
3746 results found
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Student/Studying Interface Learning Manual: Interactive Simulation Interface | Moving the Slider Is Not the Same as Running an Investigation
7–10 minutes -
MindOS Learning Manual: Output-Interference State | The Answers You Recall First Can Make Later Answers Harder to Produce
8–12 minutes -
Student/Studying Interface Learning Manual: Zoom & Reflow Interface | Making Text Bigger Can Make the Page Harder to Operate
5–8 minutes -
MindOS Learning Manual: Part-List Cuing State | Seeing Some of the Answers Can Make the Rest Harder to Recall
9–13 minutes -
Student/Studying Interface Learning Manual: OCR Interface | A Scanned Page Can Look Readable and Still Be Invisible to the Study Tools
6–10 minutes -
Bolt Performance Calibration — Excellent Homework Does Not Automatically Prove Independent Mastery
8–12 minutes -
Bolt Performance Calibration — A Total Score Can Hide a Changing Skill Profile — and Subscores Can Be Too Noisy to Rescue It
8–11 minutes -
MindOS Learning Manual: Intertextual-Integration State | Reading Four Sources Is Not the Same as Building One Coherent Understanding
7–11 minutes -
Bolt Performance Calibration — A Teacher Can Rank Students Correctly and Still Misjudge Their Actual Level
7–11 minutes -
MindOS Learning Manual: Relevance-Filtering State | The Most Interesting Detail on the Page May Be the Least Useful Thing to Study
6–10 minutes -
Bolt Performance Calibration — A Report-Card Grade Is Not Automatically a Pure Achievement Score
8–12 minutes -
MindOS Learning Manual: Refutation State | Correcting a Misconception Is Not the Same as Telling the Right Answer
6–10 minutes -
MindOS Learning Manual: Prior-Knowledge Activation State | What You Already Know Can Help—or Mislead—the Next Thing You Learn
7–11 minutes -
MindOS Learning Manual: Memory-for-Change State | Noticing What Changed Can Stop the Old Version From Winning
14–20 minutes -
Bolt Performance Calibration — When the Score Becomes the Target, the Score Can Improve Faster Than the Learning
8–12 minutes -
Student/Studying Interface Learning Manual: Collaborative-Document Interface | A Shared File Does Not Automatically Create Shared Work
8–12 minutes -
Bolt Performance Calibration — The Same Piece of Work Can Look Better or Worse Depending on What the Teacher Saw Before It
7–11 minutes -
Student/Studying Interface Learning Manual: Writing-Suggestion Interface | A Green Tick Can Fix the Sentence and Hide the Decision
7–10 minutes -
Bolt Performance Calibration — Before You Call It a Weakness, Check Whether the Student Had a Fair Opportunity to Learn It
8–11 minutes -
Student/Studying Interface Learning Manual: Caption & Transcript Interface | Turning Sound Into Text Does Not Automatically Preserve the Lesson
7–10 minutes -
Bolt Measurement Note — Oral and Written Performance Are Not Automatically the Same Measurement
6–9 minutes -
Bolt Performance Calibration — The Lesson Can Change Because Someone Is Watching
6–10 minutes -
Student/Studying Interface Learning Manual: Speech-to-Text Interface | Speaking the Answer Is Not the Same as Submitting the Words
6–10 minutes -
Bolt Measurement Note — The Final Group Product Cannot Tell You Who Did What
4–6 minutes -
MindOS Learning Manual: Hypercorrection State | A High-Confidence Error Can Sometimes Be Easier to Correct
6–10 minutes -
Bolt Measurement Note — Multiple-Choice and Constructed-Response Scores Are Not Automatically Equivalent
5–8 minutes -
Student/Studying Interface Learning Manual: Text-to-Speech Interface | Hearing the Page Can Open Access Without Replacing the Page
7–11 minutes -
Bolt Measurement Note — Open-Book and Closed-Book Scores Do Not Mean the Same Thing by Default
6–9 minutes -
MindOS Learning Manual: Retrieval-Induced Forgetting State | Retrieving One Answer Can Make a Related Answer Harder to Access
6–10 minutes -
MindOS Learning Manual: Judgment-of-Learning State | Feeling Learned Is Not the Same as Predicting What You Will Remember
7–11 minutes -
Bolt Performance Calibration — This Year’s School Average May Change Because This Year’s Students Changed
6–10 minutes -
Bolt Measurement Note 28 — Paper and Screen Scores Are Not Automatically Interchangeable
6–8 minutes -
Bolt Performance Calibration — A Teacher Prediction Can Change the Performance It Later Appears to Predict
6–9 minutes -
Bolt Measurement Note 27 — You Cannot Judge an Intervention Before You Know What Was Actually Implemented
6–8 minutes -
MindOS Learning Manual: Paraphrase State | “In Your Own Words” Can Still Be Wrong
8–11 minutes -
Bolt Performance Calibration — A Low-Stakes Score Can Measure Effort as Well as Achievement
6–8 minutes -
Bolt Measurement Note 26 — A Coaching Conversation Is Not Yet Improved Teaching
6–9 minutes -
Bolt Performance Calibration — A Higher Score With an Accommodation Does Not Automatically Mean an Unfair Advantage
6–9 minutes -
MindOS Learning Manual: Learning-by-Teaching State | Preparing to Teach Can Change How You Learn
7–11 minutes -
Bolt Measurement Note 25 — A Class Score Gain Is Not Automatically the Teacher’s Effect
7–10 minutes -
MindOS Learning Manual: Gesture-to-Learn State | Sometimes the Hands Can Carry Part of the Idea
6–10 minutes -
Student/Studying Interface Learning Manual: Diagram & Figure Interface | A Picture Can Contain the Answer and Still Be Hard to Read
4–6 minutes -
MindOS Learning Manual: Production-Effect State | Reading It Aloud Can Make It More Memorable—But Not More Understood
7–10 minutes -
Student/Studying Interface Learning Manual: Formula & Reference-Sheet Interface | Having the Formula Is Not the Same as Knowing When It Applies
4–6 minutes -
Student/Studying Interface Learning Manual: Translation Tool Interface | A Translation Can Help You Re-enter the Lesson Without Replacing the Lesson
4–5 minutes -
Student/Studying Interface Learning Manual: Citation & Attribution Interface | Using a Source Is Not Finished Until the Reader Can Trace It
3–5 minutes -
Student/Studying Interface Learning Manual: Submission Preflight Interface | Finished Work Is Not Finished Until the Right Thing Actually Leaves
4–6 minutes -
Bolt Measurement Note 24 — Live and Video Observations Can Score the Same Teaching Differently
6–10 minutes -
Student/Studying Interface Learning Manual: Voice-Note Interface | A Good Explanation Can Disappear Inside a 12-Minute Recording
4–6 minutes -
Bolt Measurement Note 23 — Human-Like Agreement Does Not Make an AI Marker Valid
6–9 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.
