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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Secondary 4 Additional Mathematics Learning Guide | Verification, Timing and Examination Recovery
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Secondary 4 Additional Mathematics Learning Guide | Worked Solutions, Hint Fading and Independent Reconstruction
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Secondary 4 Additional Mathematics Sengkang | The Voyage of Water
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Secondary 4 Additional Mathematics Tuition Sengkang | SEC 2027+ A-Math
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Secondary 4 English Examination Preparation | Protect the Working System
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Secondary 4 English Learning Guide | Argument, Evaluation and Discursive Writing
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Secondary 4 English Learning Guide | Comprehension Question Types and Answer Precision
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Secondary 4 English Learning Guide | Continuous Writing: Prompt Choice, Development, Style and Timed Revision
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Secondary 4 English Learning Guide | Editing, Situational Writing and Continuous Writing
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Secondary 4 English Learning Guide | Editing: Advanced Grammar, Sentence Boundaries and Error Control
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Secondary 4 English Learning Guide | Exam Error Analysis and Final Transfer
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Secondary 4 English Learning Guide | Language Effects: Word Choice, Imagery, Tone and Writer’s Perspective
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Secondary 4 English Learning Guide | Listening, Note-Taking and Real-Time Inference
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Secondary 4 English Learning Guide | Listening, Oral Communication, Vocabulary and Final Revision
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Secondary 4 English Learning Guide | Oral Communication: Planned Response, Spoken Interaction and Recovery
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Secondary 4 English Learning Guide | Reading, Comprehension, Inference and Summary Under Time
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Secondary 4 English Learning Guide | Situational Writing: Audience, Context, Information Transformation and Tone
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Secondary 4 English Learning Guide | Summary Mastery and Compression
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Secondary 4 English Learning Guide | The Last-Mile Examination Control System
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Secondary 4 English Learning Guide | Visual and Multimodal Text: Purpose, Layout, Evidence and Evaluation
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Secondary 4 English Learning Guide | Vocabulary in Context, Collocation, Register and Precision
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Secondary 4 English Sengkang | The Last-Mile Error Map
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Secondary 4 English Sengkang | The Voyage of Water
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Secondary 4 English Sengkang | Why 3-Pax Helps Last-Mile Examination Control
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Secondary 4 English Tuition at Punggol | O-Level Excellence with eduKate
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Secondary 4 English Tuition Sengkang | SEC 2027+ Exam Preparation
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Secondary 4 English Tutor | Curie Series | Integration, SEC and the Handover Beyond Secondary School
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Secondary 4 Mathematics 2026 | Final GCE Cohort Before SEC 2027 | Examination Craft
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Secondary 4 Mathematics Classroom | Chapter 1: Sets | SEC G3 K310
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Secondary 4 Mathematics Classroom | Chapter 2: Probability of Combined Events | SEC G3 K310
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Secondary 4 Mathematics Classroom | Chapter 3: Statistical Data Analysis | SEC G3 K310
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Secondary 4 Mathematics Classroom | Chapter 4: Matrices | SEC G3 K310
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Secondary 4 Mathematics Classroom | Chapter 5: Vectors | SEC G3 K310
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Secondary 4 Mathematics Classroom | Chapter 6: Numbers and Algebra Revision | SEC G3 K310
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Secondary 4 Mathematics Classroom | Chapter 7: Geometry and Measurement Revision | SEC G3 K310
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Secondary 4 Mathematics Classroom | Chapter 8: Probability and Statistics Revision | SEC G3 K310
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Secondary 4 Mathematics Classroom | Chapter-by-Chapter Learning Route | SEC G3 K310
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Secondary 4 Mathematics Learning Guide | Accuracy, Estimation and Calculator Discipline
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Secondary 4 Mathematics Learning Guide | Algebra, Functions and Graphs Under Mixed-Topic Conditions
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Secondary 4 Mathematics Learning Guide | Algebraic Expansion, Factorisation and Equivalent Forms
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Secondary 4 Mathematics Learning Guide | Algebraic Formulae, nth-Term Patterns and Change of Subject
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Secondary 4 Mathematics Learning Guide | Algebraic Fractions: Multiply, Divide, Add and Subtract
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Secondary 4 Mathematics Learning Guide | Angles, Polygons, Parallel Lines and Symmetry
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Secondary 4 Mathematics Learning Guide | AO2 Model Building: Relevant Information, Assumptions, Constraints and Validation
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Secondary 4 Mathematics Learning Guide | AO2 Translation: From Words, Tables, Graphs and Diagrams to Mathematics
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Secondary 4 Mathematics Learning Guide | AO3 Mathematical Argument: Justification, Counterexamples, Evidence and Complete Explanations
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Secondary 4 Mathematics Learning Guide | Bearings, Sine Rule, Cosine Rule and Triangle Area
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Secondary 4 Mathematics Learning Guide | Boundary Cases and Admissible Solutions: Domains, Restrictions, Integer Constraints and Impossible Answers
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Secondary 4 Mathematics Learning Guide | Build an Examination Route Before You Calculate
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Secondary 4 Mathematics Learning Guide | Circle Theorems and Geometrical Proof
Browse every published Post
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How to Read Connected PSLE Science Set-Ups When One Part Feeds Into the Next
12–19 minutes -
How to Tell a PSLE Science Procedure Step From an Observation or Measurement
11–17 minutes -
How to Tell a PSLE Science Method Limitation From a Mistake in the Investigation
14–21 minutes -
How to Reason Through PSLE Science Inquiry When the Steps Do Not Come in Textbook Order
9–14 minutes -
How to Combine Qualitative and Quantitative Evidence in PSLE Science Without Forcing One Into the Other
10–15 minutes -
How to Decide Whether Two PSLE Science Data Sets Show the Same Relationship
10–14 minutes -
How to Use Healthy Scepticism in PSLE Science Without Distrusting Every Result
9–14 minutes -
Top 10 Listening Skills Worth Learning
23–34 minutes -
How to Decide Whether to Reattempt the Same PSLE Science Paper or Use a New One After Corrections
10–15 minutes -
How to Decide Whether a PSLE Science Investigation Should Use the Same Specimen or Different Similar Specimens
8–12 minutes -
How to Tell Whether a PSLE Science Weakness Is Real Across Several Practice Papers
10–15 minutes -
How to Decide How Long a PSLE Science Investigation Should Run Before the Final Observation
10–15 minutes -
How to Diagnose a PSLE Science Answer That Is Correct but Takes Too Long
9–14 minutes -
How to Read a PSLE Science Cycle When the Diagram Starts at a Different Stage
8–12 minutes -
How to Decide Which Conditions Actually Need to Stay the Same in a PSLE Science Fair Test
9–13 minutes -
How to Choose Between Words, a Diagram, a Table and a Graph in PSLE Science
9–13 minutes -
How to Tell a PSLE Science Definition, Relationship and Mechanism Apart When Revising
15–23 minutes -
How to Check Whether Your PSLE Science Practice Covers Enough Different Reasoning Jobs
10–14 minutes -
How to Decide Between a Descriptive Observation and a Numerical Measurement in PSLE Science
9–14 minutes -
How to Build a Branching Classification Key in PSLE Science From Evidence
9–14 minutes -
How to Keep a PSLE Science Investigation Question, Prediction and Conclusion in Different Jobs
11–17 minutes -
How to Write a PSLE Science Relationship Statement From Data Without Turning It Into a Cause
9–14 minutes -
How to Tell One Trial, One Measurement and One Specimen Apart in a PSLE Science Investigation
11–16 minutes -
How to Read “Increase By” and “Increase To” in PSLE Science Without Mixing Change With Final Value
8–12 minutes -
How to Tell a PSLE Science Variable From the Values Used for It
6–9 minutes -
How to Decide How Much Scientific Detail a PSLE Science Explanation Really Needs
7–10 minutes -
Controlled Variable vs Control Set-Up | PSLE Science Evidence Guide
7–10 minutes -
How to Learn PSLE Science Facts With Conditions Instead of Memorising Them as Always-True Rules
7–11 minutes -
How to Compare a Similarity and a Difference in PSLE Science Using the Same Scientific Basis
9–13 minutes -
How to Change a PSLE Science Answer During Checking Only When the Evidence Gives You a Reason
9–13 minutes -
How to Know When You Are Ready to Move From Untimed PSLE Science Practice to Timed Papers
9–13 minutes -
How to Answer a PSLE Science Question With Two Commands Without Completing Only Half the Job
9–13 minutes -
How to Revise PSLE Science From Your Mistakes Without Re-reading Whole Chapters
11–16 minutes -
How to Answer “How Do You Know?” in PSLE Science With Evidence Instead of a Mechanism
9–14 minutes -
How to Infer the Scientific Question From a PSLE Science Investigation Set-Up
9–14 minutes -
How to Turn PSLE Science Notes Into Retrieval Questions That Test Reasoning, Not Just Definitions
11–17 minutes -
How to Check a PSLE Science Result for Internal Consistency Before You Explain It
9–14 minutes -
How to Decide Which PSLE Science Mistakes to Correct First After a Paper
10–15 minutes -
How to Infer a Missing Stage in a PSLE Science Process Without Guessing From Position
9–14 minutes -
How to Use a Branching Classification Key in PSLE Science Without Changing the Rule Halfway
9–13 minutes -
How to Build a PSLE Science Concept Map That Shows Relationships Instead of Copying Chapter Notes
12–18 minutes -
How to Read a Calculated PSLE Science Value Without Confusing It With a Direct Measurement
10–15 minutes -
How to Keep a PSLE Science Investigation Consistent From Question to Variables to Results to Conclusion
11–17 minutes -
How to Compare a PSLE Science Prediction With the Actual Result Without Rewriting the Prediction Afterward
12–17 minutes -
How to Use Older PSLE Science Practice Papers Without Studying the Wrong Requirements
23–34 minutes -
How to Solve a PSLE Science MCQ With Several Statements Without Treating Them as One Big Option
23–34 minutes -
Top 10 Abstraction Skills Worth Learning
21–32 minutes -
How Questioning Works in Teaching | Designing Questions That Reveal Thinking and Guide the Next Move
84–126 minutes -
Top 10 Prioritisation Skills Worth Learning
18–27 minutes -
How to Read a Reference Line in PSLE Science Data Without Treating It as Another Measured Series
15–23 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.
