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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PSLE Mathematics 2026 | The Syllabus as a Thinking Map
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PSLE Mathematics 2026 | What Changed and What Students Must Adapt
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PSLE Mathematics AL1 | Why Ten Tips Are Not Enough | Voyage to Examination Craft
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PSLE Mathematics Preparation Sengkang | Build the System Before the Papers
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PSLE Mathematics Sengkang | The Voyage of Water — Finding the Route
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PSLE Science 2026 | What Students Must Adapt | Examination Craft
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PSLE Science 2026 | What the Syllabus Requires Students to Do
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PSLE Science AL1 | Why Ten Tips Are Not Enough | Voyage to Examination Craft
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PSLE Science Learning Guide | Questions, Evidence, Investigations & Revision
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PSLE Science Reality Lab | Real-World Evidence, Claims & Scientific Reasoning
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PSLE Science Sengkang | The Voyage of Water — Evidence to Explanation
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PSLE Science Tuition Punggol | From Reconstruction to Examination Craft
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PSLE Science Tuition Sengkang | Use the Paper to Find the Failure
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PSLE Sengkang | The Voyage — The Final Primary Port
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Punggol Primary 1 English Tuition | Build Strong Literacy Foundations with eduKate
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Punggol Primary 2 English Tuition | Strengthen Early Foundations with eduKate
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Punggol Primary 3 English Tuition | Strengthening Foundations with eduKate
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Punggol Primary 3 Science | Local Entry to Observation & Evidence
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Punggol Primary 4 English Tuition | Build Strong Foundations with eduKateSengkang
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Punggol Primary 4 Science | Local Entry to Relationships & Evidence
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Punggol Primary 5 English Tuition | Local Entry to the PSLE Runway
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Punggol Primary 6 English Tuition | Local Entry to PSLE Examination Craft
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Punggol Primary 6 Science | Local Entry to PSLE Reconstruction
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Questions to Ask a Tuition Centre Before Enrolling | Sengkang Parent Checklist
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Reading the Question: The Eight Words That Change What Is Being Asked
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Receipt | What Comes Back After the Tutorial?
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Recovery After a Failed Route | Marie Curie Series | What Happens When the First Method Does Not Work?
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Release | When the Tutorial Lets the Learner Carry the Next Move
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Representation Shift | Marie Curie Series | Can the Learner Move Between Words, Diagrams, Symbols and Models?
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Retirement Transition Tutor | Curie Series | From Work-Organised Life to Self-Organised Life
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Retrieval Stability | Marie Curie Series | Why Learning Must Survive Time
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Return Warden | Ownership and Capability Return Agent
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Return-to-Learning Tutor | Curie Series | Becoming a Structured Learner Again
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Return-to-Work Tutor | Curie Series | Re-Entering Employment After a Career Break
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Rivervale Primary School: A Parent’s Learning Guide
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Route Selection | Marie Curie Series | How Learners Choose What to Do Before They Execute
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Runtime Steward | MindOS, Bolt and Student Interface Agent
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Schoolwork or Foundation Repair: Which Should Tuition Do First?
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Science by Level | From Year 0 to Research & Professional Science
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Science Checking by Question Type | MCQ, Open-Ended, Graphs and Experiments
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Science Checking Routine | Five Checks and a 60-Second Exam Review
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Science Connection Map | Spider, Web, Hidden and Deep Connections
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Science Explanation, Transfer & Examination Craft | From Knowing to Performing
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Science Fort Steward | Observation, Models and Evidence Agent
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Science Hub | A Question Worth Following | eduKate Sengkang
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Science Tutor Punggol | Local Entry to P3–P6 Primary Science
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Science Tutor Sengkang | See the First Weak Link in P3–P6 Science
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Science Tutor | Curie Series | Seeing How Scientific Thinking Changes
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Scientific Instrumentation, Imaging & Measurement | How Research Sees and Tests the World
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Scientific Method, Evidence & Measurement | How Science Knows
Browse every published Post
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How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0043 | Mathematics: Boundary and Counterexample Clinic — Test a Claim Before You Trust It
19–28 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0053 | English: Follow a Revised Journey Plan Without Choosing an Abandoned Suggestion
20–30 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0050 | English: The Final 5 Minutes Before K300
17–25 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0042 | English: Paraphrase Fidelity — Change the Wording Without Changing the Meaning
19–29 minutes -
How Molecular Measurement Techniques Turn Hidden Structure Into Evidence
41–62 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0049 | The Final 5 Minutes: EMS Entry Into the Paper
18–26 minutes -
How Electron Transfer Theory Connects Thermodynamics and Kinetics
41–62 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0041 | Self-Coaching Under Time — Short Cues That Protect the Next Decision
19–29 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0048 | Science: The Final 10 Minutes Before the G3 Papers
17–25 minutes -
How Electrochemical Potential and the Nernst Equation Work
42–63 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0052 | Science: Explain a School-Fair Cooler Test From Setup to Conclusion
21–31 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0051 | Check Which Later Parts Really Depend on Your Earlier Answer
21–31 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0051 | Mathematics: Compare School-Fair Purchase Plans Without Ignoring Pack Sizes
20–30 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0050 | English: Turn a School-Fair Brief Into a Message the Reader Can Use
21–31 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0049 | Science: Match Each Setup to Its Results Before You Explain the Difference
20–31 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0049 | Use One School-Fair Case to Test Transfer Across English, Mathematics and Science
21–31 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0048 | Mathematics: Prove Your List Is Complete Without Counting a Case Twice
20–30 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0040 | Science: Controlled-Comparison Clinic — Change One Condition, Test the Right Claim
18–27 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0047 | English: Repair an Oral Answer Without Restarting the Whole Conversation
22–33 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0039 | Mathematics: Contrast-Pair Clinic — Similar Questions, Different Methods
14–21 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0038 | English: Two-Text Reading Clinic — Keep Each Writer’s Claim Separate
17–25 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0037 | Mixed-Skills Checkpoint — Twelve Tasks That Reveal Your Next Learning Priority
16–24 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0047 | Mathematics: The Final 10 Minutes Before K310
16–25 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0046 | Science: Separate What Can Happen From What Did Happen in the Evidence
27–41 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0045 | Mathematics: Separate Part-to-Part Ratio From Part-to-Whole Fraction Before You Convert
26–39 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0046 | English: The Final 10 Minutes Before K300
17–25 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0044 | English: Name the Two Things Being Compared Before You Interpret More or Less
28–42 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0046 | Treat Only, Except, At Least, Most and Least as Constraints
27–41 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0043 | Use the Right Rule Only Where Its Conditions Fit
24–36 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0045 | The Final 10 Minutes: EMS Handoff Into the Paper
18–26 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0045 | Science: The Same Result Does Not Prove the Same Process
24–36 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0044 | Mathematics: Reject Answers That Fit the Arithmetic but Break the Context
27–40 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0043 | English: Separate a Character’s Claim From the Narrator’s Fact Before You Decide What Is True
23–35 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0044 | Science: The Final 30 Minutes Before the G3 Papers
17–25 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0036 | Science: Evidence Strength — Observation, Inference, Causation and Conclusions
19–28 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0043 | Mathematics: The Final 30 Minutes Before K310
17–26 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0042 | English: The Final 30 Minutes Before K300
18–26 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0035 | Mathematics: Constraints and Feasibility — At Least, At Most, Whole Numbers and Valid Answers
19–28 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0034 | English: Final-Pass Editing — Task First, Meaning Second, Grammar Third
19–29 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0041 | The Final 30 Minutes: EMS Transition Into the Examination Room
17–25 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0033 | Exam-Readiness Thresholds — When a Skill Is Actually Ready
19–28 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0040 | Science: The Final 60 Minutes Before the G3 Papers
17–25 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0039 | Mathematics: The Final 60 Minutes Before K310
16–24 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0038 | English: The Final 60 Minutes Before K300
17–25 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0037 | The Final 60 Minutes: EMS Pre-Paper Control
17–25 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0036 | Science: The Final 24 Hours Before the G3 Papers
17–25 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0042 | Science: Do Not Treat No Evidence as Evidence of No Effect
20–29 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0035 | Mathematics: The Final 24 Hours Before K310
17–25 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0041 | Mathematics: Separate Additive Change From Multiplicative Change
18–27 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0034 | English: The Final 24 Hours Before K300
17–25 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.
