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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How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0128 | Reversible vs Irreversible Moves — Preserve Options Until the Evidence Is Strong Enough
38–58 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0127 | Science: Dynamic Balance — A Stable Result Does Not Mean Nothing Is Happening
41–61 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0126 | Mathematics: Monotonicity Checks — Know Which Way the Output Must Move as the Input Changes
36–55 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0125 | English: Tense–Aspect Control — Track What Happened, What Was Ongoing and What Came Earlier
41–61 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0124 | Constraint Stack — Satisfy Every Active Rule Without Losing the Main Task
39–58 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0065 | Conflicting Evidence Workshop: From Disagreement to a Defensible EMS Answer
19–28 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0064 | Science: The First 30 Minutes — A Worked Decision Clinic
20–30 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0123 | Science: Path Dependence — The Same Input Can Produce a Different Result When the History Is Different
48–72 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0122 | Mathematics: Breakpoint Reasoning — Test Below, At and Above the Value Where the Rule Changes
39–59 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0121 | English: Information-Focus Control — Notice What the Sentence Makes Most Prominent
45–67 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0120 | Answer-State Control — Know Whether the Question Is Parsed, Solved, Blocked, Verified or Closed
42–63 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0119 | Science: Response Lag — The Cause Can Change Before the Effect Becomes Measurable
45–68 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0118 | Mathematics: Conservation and Balance Checks — Rebuild the Whole to Test the Parts
38–58 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0117 | English: Reference-Frame Control — Who Is Here, When Is Now and Which Way Is Left?
36–54 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0116 | Dependency Blast Radius — Repair the Error According to How Far It Spreads
37–56 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0115 | Science: Baseline Drift — Check Whether the Reference Condition Is Moving Too
40–61 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0114 | Mathematics: Forward-Substitution Verification — Put the Answer Back Into the Original Problem
37–55 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0113 | English: Reporting-Verb Calibration — Says, Claims, Admits, Confirms and Suggests Are Not the Same
41–62 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0112 | Evidence Debt — Pay Every Unsupported Step Before It Carries the Answer
19–28 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0063 | Mathematics: The First 30 Minutes of K310
17–25 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0062 | English: The First 30 Minutes of K300
17–25 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0064 | One Example Does Not Prove a Rule — Test a Second Case Before You Generalise
23–35 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0063 | Science: The Same Temperature Does Not Mean the Same Amount of Heat Was Transferred
19–29 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0111 | Science: Rate Versus Amount — Do Not Confuse How Fast With How Much
44–66 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0110 | Mathematics: Comparison-Measure Choice — Difference, Ratio, Percentage or Rate?
43–64 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0061 | The First 30 Minutes: EMS Sustained First-Pass Control
17–25 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0109 | English: Negation-Scope Control — Know Exactly What the Negative Word Reverses or Limits
48–72 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0108 | Local–Global Consistency — Make Every Correct Step Fit the Whole Problem
19–29 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0062 | Mathematics: Use a Double Number Line Without Changing the Base Quantity Midway
19–29 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0061 | English: Track What a Descriptive Phrase Actually Modifies Before You Infer Meaning
22–33 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0060 | Science: The First 10 Minutes of the G3 Papers
17–25 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0107 | Science: Interaction Effects — When the Effect of One Factor Depends on Another
31–47 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0103 | Science: Sequence and Carryover Effects — When the Previous Trial Changes the Next
20–30 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0106 | Mathematics: Representation Choice — Pick the Form That Exposes the Relationship You Need
25–38 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0105 | English: Presupposition Control — Separate What a Sentence States From What It Quietly Assumes
26–40 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0104 | Representation Handoffs — Change Form Without Losing the Information That Controls the Answer
20–30 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0102 | Mathematics: Solution-Set Preservation — Know Which Algebraic Moves Are Truly Reversible
19–29 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0060 | Check the Handoff When You Move Between Words, Diagrams, Numbers and Answers
20–30 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0101 | English: Modality and Certainty Control — Must, Should, May, Might, Can and Could
20–30 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0103 | Science: Model-Validity Boundaries — Know Where a Useful Model Stops Being Reliable
31–46 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0100 | Auditable Partial Solutions — Make Valid Reasoning Visible When You Cannot Finish
20–30 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0102 | Mathematics: Work-Backward Reconstruction — Start From the Target and Rebuild the Necessary Steps
30–45 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0101 | English: Exception Control — Store the Rule Together With the Boundary That Limits It
26–39 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0100 | Checkpoint Compression — Store the Smallest State You Need to Resume Accurately
21–31 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0099 | Science: Control-Condition Logic — Know Which Alternative Explanation Each Control Rules Out
38–57 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0098 | Mathematics: Case Splitting — Know When One Problem Needs More Than One Valid Branch
30–45 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0097 | English: Question-Stem Parsing — Know the Answer Shape Before You Search the Passage
35–52 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0096 | Response-Interface Integrity — Make Sure the Final Paper Says What You Actually Know
20–31 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0059 | Mathematics: The First 10 Minutes of K310
17–25 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0095 | Science: Scale Translation — Connect Particles, Cells and Local Measurements to Whole-System Results
36–54 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.
