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 1 Mathematics Classroom | Chapter 4: Percentages and Reverse Percentages | G2/G3
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Secondary 1 Mathematics Classroom | Chapter 5: Rate, Speed and Unit Conversion | G2/G3
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Secondary 1 Mathematics Classroom | Chapter 6: Algebraic Language, Expressions, Formulae and nth-Term Patterns | G2/G3
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Secondary 1 Mathematics Classroom | Chapter 7: Linear Equations and Problem Formation | G2/G3
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Secondary 1 Mathematics Classroom | Chapter 8: Coordinates, Linear Functions, Graphs and Gradient | G2/G3
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Secondary 1 Mathematics Classroom | Chapter 9: Angles, Triangles, Polygons and Geometrical Construction | G2/G3
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Secondary 1 Mathematics Learning Guide | Algebraic Expressions and Variables
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Secondary 1 Mathematics Learning Guide | Algebraic Formulae, Substitution and Rearrangement
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Secondary 1 Mathematics Learning Guide | Algebraic Simplification, Like Terms, Brackets and Common Factors
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Secondary 1 Mathematics Learning Guide | Average Rate, Average Speed and Multi-Stage Journeys
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Secondary 1 Mathematics Learning Guide | Calculator Skills, Exact Values and Input Discipline
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Secondary 1 Mathematics Learning Guide | Congruence, Similarity and Scale-Factor Reasoning
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Secondary 1 Mathematics Learning Guide | Conjectures, Counterexamples, Proof and Mathematical Conviction
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Secondary 1 Mathematics Learning Guide | Coordinates, Linear Graphs and Relationships
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Secondary 1 Mathematics Learning Guide | Data Collection, Sampling, Bias and Statistical Representation
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Secondary 1 Mathematics Learning Guide | Data, Averages, Statistical Representations and Probability
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Secondary 1 Mathematics Learning Guide | Directed Numbers, Rational Numbers and Four Operations
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Secondary 1 Mathematics Learning Guide | Equations and Equality
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Secondary 1 Mathematics Learning Guide | Geometrical Construction, Scale Drawings and Loci
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Secondary 1 Mathematics Learning Guide | Geometry, Angles and Polygons
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Secondary 1 Mathematics Learning Guide | Indices, Powers and Standard Form
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Secondary 1 Mathematics Learning Guide | Linear Inequalities and Number-Line Reasoning
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Secondary 1 Mathematics Learning Guide | Mathematical Communication, Working and Justification
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Secondary 1 Mathematics Learning Guide | Mensuration, Perimeter, Area, Surface Area and Volume
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Secondary 1 Mathematics Learning Guide | Mixed-Topic Strategy, Verification and Error Analysis
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Secondary 1 Mathematics Learning Guide | Number Patterns, Sequences and nth-Term Generalisation
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Secondary 1 Mathematics Learning Guide | Numbers, Number Lines, Approximation and Estimation
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Secondary 1 Mathematics Learning Guide | Percentage Points, Percentage Change and Comparison
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Secondary 1 Mathematics Learning Guide | Percentages and Reverse Percentages
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Secondary 1 Mathematics Learning Guide | Prime Factorisation, HCF, LCM, Squares, Cubes and Roots
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Secondary 1 Mathematics Learning Guide | Pythagoras’ Theorem and Right-Triangle Reasoning
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Secondary 1 Mathematics Learning Guide | Rate, Speed and Unit Conversion
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Secondary 1 Mathematics Learning Guide | Ratio and Proportion
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Secondary 1 Mathematics Learning Guide | Read the Question Before Choosing a Method
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Secondary 1 Mathematics Learning Guide | Real Numbers, Irrational Numbers and Number Classification
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Secondary 1 Mathematics Learning Guide | Set Language, Venn Diagrams and Counting
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Secondary 1 Mathematics Learning Guide | Symmetry, Reflections, Rotations and Invariant Properties
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Secondary 1 Mathematics Learning Guide | Word Problems and Mathematical Representation
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Secondary 1 Mathematics Punggol | Legacy Entry to the S1 Mathematics System
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Secondary 1 Mathematics Sengkang | The Voyage of Water
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Secondary 1 Mathematics Tuition
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Secondary 1 Mathematics Tuition Sengkang | The Primary-to-Secondary Math Reset
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Secondary 1 Mathematics Tutor | Curie Series | Reorganising Arithmetic Into Algebraic Structure
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Secondary 1 Mathematics Walkthrough | Chapter-by-Chapter Classroom Route | G2/G3
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Secondary 1 Science Tutor | Curie Series | From Primary Themes to Models, Measurement and Disciplines
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Secondary 1 Tuition Sengkang | The Primary-to-Secondary Learning Reset
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Secondary 2 English Learning Guide | Cohesion Across Sentences and Paragraphs
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Secondary 2 English Learning Guide | Comparative Reading: Viewpoint, Agreement, Difference and Evaluation
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Secondary 2 English Learning Guide | Comprehension Cloze: Context, Cohesion, Vocabulary and Logic
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Secondary 2 English Learning Guide | Comprehension Question Control and Answer Precision
Browse every published Post
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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.
