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 Mathematics Learning Guide | Completing the Square, Quadratic Formula and Graphical Solutions
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Secondary 4 Mathematics Learning Guide | Congruence, Similarity, Scale Drawings and Area-Volume Ratios
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Secondary 4 Mathematics Learning Guide | Coordinate Geometry and Transformations as Representation
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Secondary 4 Mathematics Learning Guide | Coordinate Geometry: Segment Length, Straight-Line Equations and Geometric Problem Solving
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Secondary 4 Mathematics Learning Guide | Cumulative Frequency, Box Plots and Standard Deviation
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Secondary 4 Mathematics Learning Guide | Data Collection, Classification, Tabulation and Choosing Statistical Representations
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Secondary 4 Mathematics Learning Guide | Dimensional Reasoning: Units, Compound Units, Scale, Area–Volume Conversion and Error Detection
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Secondary 4 Mathematics Learning Guide | Direct and Inverse Proportion, Scale and Rate Models
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Secondary 4 Mathematics Learning Guide | Distance-Time and Speed-Time Graphs: Motion, Rate and Interpretation
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Secondary 4 Mathematics Learning Guide | Error Analysis, Corrections and Full-Paper Recovery
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Secondary 4 Mathematics Learning Guide | Formulae Provided, Working Required: Formula-Sheet Intelligence, Essential Working, Accuracy and Calculator Control
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Secondary 4 Mathematics Learning Guide | Fractional Equations Reduced to Linear and Quadratic Equations
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Secondary 4 Mathematics Learning Guide | Fractional Indices, Roots and Exact Powers
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Secondary 4 Mathematics Learning Guide | Geometrical Constructions, Bisectors and Constraint Diagrams
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Secondary 4 Mathematics Learning Guide | Geometry, Trigonometry and Measurement as a Constraint System
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Secondary 4 Mathematics Learning Guide | Gradient of Curves: Tangents, Local Rate of Change and Graphical Estimation
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Secondary 4 Mathematics Learning Guide | Grouped Data: Mean, Standard Deviation, Quartiles, Percentiles and Comparing Distributions
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Secondary 4 Mathematics Learning Guide | Histograms, Statistical Diagrams and Misleading Data
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Secondary 4 Mathematics Learning Guide | Indices, Standard Form and Exact Number Structure
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Secondary 4 Mathematics Learning Guide | Linear Graphs, Gradient, Intercepts and Rate of Change
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Secondary 4 Mathematics Learning Guide | Linear Inequalities, Number Lines and Boundary Reasoning
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Secondary 4 Mathematics Learning Guide | Mathematical Notation as an Operational Language: Equality, Approximation, Proportion, Inequalities, Sets and Vectors
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Secondary 4 Mathematics Learning Guide | Matrices, Data and Matrix Operations
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Secondary 4 Mathematics Learning Guide | Mean, Median, Mode, Range and Comparing Data Sets
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Secondary 4 Mathematics Learning Guide | Mensuration, Radians and Composite Solids
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Secondary 4 Mathematics Learning Guide | Past-Paper Forensics: Question Archetypes, First Failure, Error Ledgers and Transfer Retests
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Secondary 4 Mathematics Learning Guide | Personal and Household Finance: Interest, Taxation, Instalments, Utilities and Money Exchange
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Secondary 4 Mathematics Learning Guide | Power, Reciprocal and Exponential Graphs
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Secondary 4 Mathematics Learning Guide | Prime Factors, HCF, LCM and Divisibility Structure
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Secondary 4 Mathematics Learning Guide | Probability Event Logic: When to Add, Multiply, Subtract from One or Change the Denominator
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Secondary 4 Mathematics Learning Guide | Probability, Combined Events and Tree Diagrams
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Secondary 4 Mathematics Learning Guide | Pythagoras, Right-Triangle Trigonometry and Three-Dimensional Reasoning
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Secondary 4 Mathematics Learning Guide | Quadratic Equations and Algebraic Fractions
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Secondary 4 Mathematics Learning Guide | Quadratic Functions: Forms, Roots, Turning Points and Symmetry
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Secondary 4 Mathematics Learning Guide | Ratio, Percentage, Rates and Financial Mathematics
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Secondary 4 Mathematics Learning Guide | Real-World Geometry: Floor Plans, Surveying, Navigation and Interpretation
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Secondary 4 Mathematics Learning Guide | Reverse Percentages, Percentage Comparison and Repeated Change
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Secondary 4 Mathematics Learning Guide | Set Language, Venn Diagrams and Counting
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Secondary 4 Mathematics Learning Guide | Simultaneous Linear Equations, Intersections and Modelling
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Secondary 4 Mathematics Learning Guide | Statistics, Probability and Real-World Problems Under Exam Conditions
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Secondary 4 Mathematics Learning Guide | The Final Paper 2 Real-World Scenario: Model, Solve, Verify and Communicate
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Secondary 4 Mathematics Learning Guide | Vectors as Representation: Directed Segments, Position Vectors, Magnitude, Scalar Multiples and Translation
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Secondary 4 Mathematics Learning Guide | Vectors, Ratios and Collinearity
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Secondary 4 Mathematics Punggol | GCE 2026 to SEC 2027 Legacy Entry
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Secondary 4 Mathematics Sengkang | GCE 2026 or SEC 2027? Know Your Cohort
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Secondary 4 Mathematics Sengkang | GCE 2026 to SEC 2027 Transition
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Secondary 4 Mathematics Sengkang | The Voyage of Water
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Secondary 4 Mathematics Tuition Sengkang | SEC 2027+ Exam Preparation
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Secondary 4 Mathematics Tutor | Curie Series | Integration, SEC and the Handover Beyond Secondary School
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Secondary 4 Science Tutor | Curie Series | SEC Integration, Evidence and the Handover Beyond Secondary School
Browse every published Post
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How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0013 | Mock Papers: Sit, Mark, Diagnose, Repair and Retest
6–9 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0008 | Science: Keep the Claim Inside the Evidence
19–29 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0007 | Mathematics: Recover When the First Method Fails
19–28 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0012 | Science Cause, Mechanism and Evidence in Structured Responses
9–13 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0011 | Mathematics Equations, Functions and Multi-Step Transfer
9–13 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0012 | Science: Calculations, Graphs and Data — From Numbers to Evidence
6–8 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0011 | Mathematics: Paper 1 Short-Answer Fluency, Working and Accuracy
5–8 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0010 | English: Paper 1 Editing, Situational Writing and Continuous Writing
6–9 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0009 | Attempt, Skip, Return, Check: The Decision Tree for Timed Papers
6–9 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0010 | English Comprehension, Evidence, Inference and Summary
9–13 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0009 | The Secondary 1 Learning Engine
10–15 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0006 | English: Use the Passage, Not Memory, as Evidence
20–31 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0008 | Science Concepts, Data and Practical Reasoning
11–16 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0007 | Mathematics Algebra, Graphs and Problem Representation
10–15 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0008 | Science: MCQ, Structured Responses and Experimental Reasoning Under Time
6–10 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0007 | Mathematics: Paper 2 Modelling, Real-World Problems and Smart Question Choice
6–10 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0006 | English: Paper 2 Comprehension, Inference and Summary Under Time
7–10 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0005 | Build a Six-Week Route from Weak Topics to Full Papers
7–11 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0006 | English Reading-to-Writing Transfer
10–15 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0005 | The First 90 Days After PSLE
10–15 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0005 | Budget Marks, Time and Attention
19–29 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0004 | Science: Evidence, Mechanism and Explanation
9–13 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0003 | Mathematics: Method, Working and Accuracy
9–13 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0004 | Science Evidence, Explanations and Practical Reasoning
8–12 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0003 | Mathematics Reasoning, Models and Accuracy
8–11 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0002 | English Four-Paper Control
8–13 minutes -
How to Perform in the new G3 SEC Examinations | Learner’s Guide Vol 0001 | Examination Control Foundations
12–18 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0002 | English: Control the Task Before You Write
10–15 minutes -
How to Perform in the new G2 SEC Examinations | Learner’s Guide Vol 0001 | From PSLE to SEC: What Changes and What Still Works
11–16 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0002 | English: Answer the Actual Task
9–14 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0001 | Read Before You Solve
12–18 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0004 | Science: Evidence Before Explanation
6–8 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0003 | Mathematics: Represent Before You Calculate
6–9 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0002 | English: Answer the Actual Task
6–9 minutes -
How to Perform in PSLE | Learner’s Guide Vol 0001 | Read Before You Solve
6–9 minutes -
Primary 6 Mathematics: PSLE Readiness and Transfer
41–62 minutes -
Primary 5 Mathematics: Ratios, Percentages, Volume and Problem Representation
41–61 minutes -
Primary 4 Mathematics: Fractions, Decimals, Measurement and Multi-Step Problems
48–72 minutes -
Primary 1–3 Mathematics Tuition: How Foundations Compound
41–62 minutes -
Primary 3 Mathematics: Multiplication, Division, Fractions and Word Problems
41–61 minutes -
Primary 2 Mathematics: Place Value, Operations and Model Building
41–62 minutes -
Advanced Mathematics Tutorials | When a Child Refuses to Attend Mathematics Tuition — Diagnose the Reason Before Forcing the Routine
42–63 minutes -
Primary 1 Mathematics: Number Sense, Representation and Early Problem Solving
41–61 minutes -
Advanced Mathematics Tutorials | Should Mathematics Tuition Follow the School Syllabus or Run Its Own Curriculum?
42–63 minutes -
Advanced Mathematics Tutorials | Relief or Substitute Mathematics Tutor — How to Preserve Continuity When the Regular Tutor Is Away
42–64 minutes -
How Multimodal Reading Works Across Words, Images, Captions and Layout
41–62 minutes -
Advanced Mathematics Tutorials | Two Mathematics Tutors at the Same Time — When More Support Helps and When It Creates Conflict
43–64 minutes -
How Grammar Supports Meaning Rather Than Rule Memorisation
41–62 minutes -
Advanced Mathematics Tutorials | Mathematics Tuition Attention and Stamina — Why a Student Can Work Well for 30 Minutes and Fade Across a 90-Minute Lesson
42–63 minutes -
Advanced Mathematics Tutorials | Missed Mathematics Tuition Lessons — How to Catch Up Without Losing Continuity
42–63 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.
