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 Infer What a Part Does in PSLE Science by Comparing the System With and Without It
13–20 minutes -
How to Choose a Measuring Instrument for PSLE Science That Has the Right Range and Resolution
13–20 minutes -
How to Decide What to Measure in a PSLE Science Investigation So the Evidence Answers the Question
14–22 minutes -
How to Improve Productive Struggle | Difficulty, Search, Support and Better Recovery
14–21 minutes -
How Worked Examples Work in Teaching | Designing the Route, Exposing Expert Decisions and Fading Support Toward Independence
19–29 minutes -
Top 10 Perspective-Taking Skills Worth Learning
24–36 minutes -
How to Improve Help-Seeking | When to Ask, What to Ask and How to Return to Independence
16–23 minutes -
How to Decide Exactly When a PSLE Science Process Starts or Ends Before You Time It
14–20 minutes -
How to Translate the Same PSLE Science Relationship Between Words, Diagrams, Tables and Graphs
12–19 minutes -
How to Turn Raw PSLE Science Observations Into a Results Table Without Mixing the Variables
13–19 minutes -
How to Make a PSLE Science Decision When Several Criteria Matter at Once
13–19 minutes -
How to Read Approximate and Rounded Values in PSLE Science Without Inventing Extra Precision
9–13 minutes -
How to Tell Whether Two PSLE Science Answers Say the Same Science in Different Words
8–12 minutes -
How to Choose Where to Measure in a PSLE Science Investigation So the Reading Answers the Right Question
8–12 minutes -
How to Find the Same PSLE Science Reasoning Weakness Hiding Across Different Topics
9–14 minutes -
How to Use a New Scientific Rule Given Inside a PSLE Science Question
10–15 minutes -
How to Decide What to Memorise and What to Reconstruct in PSLE Science
10–14 minutes -
How to Compare Two Different PSLE Science Methods That Could Both Be Valid
9–13 minutes -
How to Know When a PSLE Science Answer Should Come From the Given Evidence and When It Needs Scientific Knowledge
10–15 minutes -
How to Tell Random Variation From a Systematic Shift in PSLE Science Results
13–20 minutes -
How to Decide Whether a PSLE Science Investigation Needs a Starting Measurement Before the Test Begins
11–16 minutes -
How to Turn PSLE Science Feedback Into a Testable Repair
11–17 minutes -
How to Tell When You Know the PSLE Science but Cannot Yet Write It Clearly
12–18 minutes -
How to Read “Same” in PSLE Science Without Assuming Everything Is Identical
14–21 minutes -
How to Read a Zoomed-In PSLE Science Diagram Without Treating the Inset as a Separate Object
12–18 minutes -
How to Match Time Points Before Comparing Two PSLE Science Set-Ups
10–14 minutes -
How to Turn a PSLE Science Claim Into an Observable Check
12–18 minutes -
How to Compare Your First and Corrected PSLE Science Answers to Find What Actually Changed
14–21 minutes -
How to Read a PSLE Science Result Given as a Range Without Turning It Into One Exact Value
12–18 minutes -
How to Read At Least, At Most, Minimum and Maximum in PSLE Science Without Reversing the Boundary
10–15 minutes -
How to Read a PSLE Science Diagram When Some Parts Are Omitted for Clarity
13–19 minutes -
How to Read a PSLE Science Legend or Key Without Treating Colour, Shading and Line Style as Evidence by Themselves
13–19 minutes -
How to Read What One Row Represents in a PSLE Science Results Table Before Comparing the Numbers
12–18 minutes -
How to Turn PSLE Science MCQ Success Into an Independent Open-Ended Explanation
13–19 minutes -
How to Tell a PSLE Science Result, Conclusion and Explanation Apart
13–20 minutes -
Top 10 Classification Skills Worth Learning
20–29 minutes -
How to Improve Reflection | Evidence, Interpretation, Repair and Better Next Attempts
14–21 minutes -
How to Decide Whether a PSLE Science Mistake Needs Relearning or More Application Practice
17–25 minutes -
How to Choose the True Science Fact That Actually Answers a PSLE Science Open-Ended Question
14–20 minutes -
How to Choose Similar Specimens for a PSLE Science Investigation Without Cherry-Picking the Result
14–20 minutes -
How to Draw a PSLE Science Explanation Diagram That Shows the Science, Not Just the Picture
15–23 minutes -
How to Read a Two-Stage PSLE Science Investigation Without Confusing Preparation With the Variable Being Tested
16–23 minutes -
How to Spot a “Controlled” Condition That Is Quietly Changing During a PSLE Science Investigation
14–21 minutes -
How to Reason With P, Q, X and Y in PSLE Science Without Guessing What the Letters Mean
14–21 minutes -
How to Turn a PSLE Science Results Table Into an Honest Graph Without Distorting the Data
14–20 minutes -
How to Improve Metacognition | Planning, Monitoring, Calibration and Better Self-Regulation
18–27 minutes -
How to Build a Targeted PSLE Science Mini-Practice Set From One Error Pattern
16–24 minutes -
How to Give Two Distinct Scientific Reasons in PSLE Science Without Saying the Same Reason Twice
13–19 minutes -
How to Put PSLE Science Data in the Right Scientific Order Before Deciding the Trend
11–17 minutes -
How to Tell What Must Be True From What Could Be True in PSLE Science
12–17 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.
