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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Primary 3 Mathematics Learning Guide | Productive Struggle, Confidence, Perseverance & Mathematical Attitudes
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Primary 3 Mathematics Learning Guide | Representation Translation: Words, Models, Number Sentences, Number Lines & Tables
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Primary 3 Mathematics Learning Guide | Revision, Error Analysis, Retrieval Practice & Test Readiness
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Primary 3 Mathematics Learning Guide | Scaffolding, Differentiation, Prompting & Fading Support
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Primary 3 Mathematics Learning Guide | Self-Explanation, Metacognition, Monitoring & Strategy Control
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Primary 3 Mathematics Learning Guide | Spaced Retrieval, Interleaving, Variation & High-Quality Practice Design
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Primary 3 Mathematics Learning Guide | Systematic Search, Constraints, Cases & Finding All Possibilities
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Primary 3 Mathematics Learning Guide | Time, 24-Hour Clock, Duration, Start Time & Finish Time
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Primary 3 Mathematics Learning Guide | Time, Measurement, Area, Perimeter & Multi-Step Applications
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Primary 3 Mathematics Learning Guide | Unit Squares, Arrays, Area Models, Missing Dimensions & Deriving the Area Formula
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Primary 3 Mathematics Learning Guide | Whole Numbers, Place Value, Addition, Subtraction, Multiplication & Division
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Primary 3 Mathematics Learning Guide | Word Problems, Bar Models, Multi-Step Reasoning & Bar Graphs
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Primary 3 Mathematics Learning Guide | Worked Examples Library: 24 Fully Explained Problems
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Primary 3 Mathematics Learning Guide | Working Memory, Chunking, Fact Fluency & Multi-Step Control
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Primary 3 Mathematics Learning Hub | Numbers, Fractions, Measurement, Geometry, Data & Problem Solving
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Primary 3 Mathematics Sengkang | Multi-Step Problem Diagnostic
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Primary 3 Mathematics Sengkang | The Voyage of Water
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Primary 3 Mathematics Tuition Sengkang | Multi-Step Problem Solving & Strong Foundations
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Primary 3 Mathematics Tutor | Curie Series | Multi-Step Structure, Fractions and Representation
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Primary 3 Mathematics | When Mathematics Becomes Multi-Step | Darwin × Voyage
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Primary 3 Science Evidence Ladder | Life Cycles: From Picture Clue to Structural Conclusion
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Primary 3 Science Evidence Ladder | Living Things: From Weak Clue to Strong Conclusion
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Primary 3 Science Evidence Ladder | Magnets: From Attraction to Repulsion and Hidden Poles
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Primary 3 Science Evidence Ladder | Materials: From Test Result to Suitable Use
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Primary 3 Science Exam Question Map | Life Cycles, Diagrams & Stage Reasoning
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Primary 3 Science Exam Question Map | Living Things, Classification & Evidence
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Primary 3 Science Exam Question Map | Magnets, Poles & Evidence
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Primary 3 Science Exam Question Map | Materials, Properties & Suitable Uses
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Primary 3 Science Learning Guide | Animal Groups & Observable Characteristics
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Primary 3 Science Learning Guide | Assessment, Checking & Exam Readiness
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Primary 3 Science Learning Guide | Better Questions & Practice Design
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Primary 3 Science Learning Guide | Butterfly, Beetle & Mosquito Life Cycles
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Primary 3 Science Learning Guide | Characteristics of Living Things: Needs, Growth, Response & Reproduction
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Primary 3 Science Learning Guide | Chicken & Frog Life Cycles
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Primary 3 Science Learning Guide | Classification with Yes/No Questions
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Primary 3 Science Learning Guide | Compare, Classify & Recognise Patterns
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Primary 3 Science Learning Guide | Comparing Animal Life Cycles
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Primary 3 Science Learning Guide | Concept Maps, Relationships & Big Ideas
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Primary 3 Science Learning Guide | Contradictions, Elimination & Choosing the Best Answer
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Primary 3 Science Learning Guide | Diagrams, Tables & Simple Investigations
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Primary 3 Science Learning Guide | Everyday Applications & Unfamiliar Scenarios
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Primary 3 Science Learning Guide | Evidence Limits, Uncertainty & How Do You Know?
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Primary 3 Science Learning Guide | Float or Sink Without Density
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Primary 3 Science Learning Guide | Flowering & Non-Flowering Plants
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Primary 3 Science Learning Guide | Fungi & Bacteria: Safe Classification and Evidence
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Primary 3 Science Learning Guide | Grasshopper & Cockroach Nymph Life Cycles
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Primary 3 Science Learning Guide | How to Answer Science Questions Clearly
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Primary 3 Science Learning Guide | Life Cycles Diagnostic Challenge Bank
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Primary 3 Science Learning Guide | Life Cycles Diagnostic Worked Answers & Error Diagnosis
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Primary 3 Science Learning Guide | Life Cycles of Plants & Animals
Browse every published Post
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How to Complete a PSLE Science Explanation When the Question Gives You the Middle Step
13–19 minutes -
How to Track the Same PSLE Science Object When Its Name Changes Between Text, Diagram and Table
10–16 minutes -
How to Turn a PSLE Science Observation Into a Testable Scientific Question
10–15 minutes -
How to Use Because, So and Therefore in PSLE Science Without Reversing Cause and Effect
8–12 minutes -
How to Keep a PSLE Science Starting Set-Up Separate From Its Later Results
9–13 minutes -
How to Find a PSLE Science Condition Hidden in a Caption, Label or Table Heading
10–14 minutes -
How to Tell Whether a PSLE Science Condition Starts a Process, Allows It, or Changes How Much Happens
9–13 minutes -
How to Compare Two PSLE Science MCQ Options That Differ by Only One Scientific Word
8–12 minutes -
How to Tell What the Experimenter Changed From What Changed Because of It in PSLE Science
9–13 minutes -
How to Track What “It”, “This”, “They” and “These” Refer To in a PSLE Science Question
9–13 minutes -
How to Test a PSLE Science MCQ Option That Starts With a True Fact but Ends With the Wrong Conclusion
10–14 minutes -
How to Ask a Useful PSLE Science Clarification Question When You Are Stuck
10–15 minutes -
How to Select Relevant Apparatus in a PSLE Science Question Without Using Every Item
9–14 minutes -
How to Tell Which PSLE Science Conditions Apply to All Set-Ups and Which Apply to Only One
9–13 minutes -
How to Recover When No PSLE Science MCQ Option Matches Your First Prediction
10–14 minutes -
How to Explain a Difference Between Two PSLE Science Set-Ups Without Explaining Only One Side
9–14 minutes -
How to Tell Whether a PSLE Science Graph Shows Change Over Time or Comparison Across Test Conditions
10–14 minutes -
How to Track a Changing Comparison Reference Across a Multi-Part PSLE Science Question
9–14 minutes -
How to Learn From a High-Scoring PSLE Science Practice Paper Without Assuming Every Answer Is Secure
11–17 minutes -
How to Compare PSLE Science Data When One Series Ends Earlier Than the Other
11–17 minutes -
How to Read a PSLE Science Graph When the Axes Are Swapped Without Reversing the Relationship
12–18 minutes -
How to Test the Reverse of a PSLE Science Relationship Without Assuming It Must Be True
14–20 minutes -
How to Read PSLE Science Process Stages Without Assuming Each Stage Takes the Same Time
10–15 minutes -
How to Read a PSLE Science Table With Grouped Headings Without Losing Which Column Means What
9–13 minutes -
How to Read PSLE Science Data With Two Conditions at Once Without Comparing the Wrong Pair
10–14 minutes -
How to Track What Enters, Leaves and Remains in a PSLE Science System
12–17 minutes -
How to Design a PSLE Science Solution From a Problem Without Jumping to the First Idea
15–22 minutes -
How to Compare Two PSLE Science Cases Through a Common Reference Without Pretending They Were Directly Compared
14–21 minutes -
How to Read Overlapping PSLE Science Graph Lines Without Losing Track of Separate Data Series
11–16 minutes -
How to Connect PSLE Science Topics Instead of Memorising Them as Separate Chapters
12–17 minutes -
Top 10 Problem-Framing Skills Worth Learning
19–29 minutes -
How to Tell Whether a PSLE Science Condition Applies at the Start, Throughout the Process or Only at the End
13–20 minutes -
How to Tell Whether Parts in a PSLE Science Diagram Are Connected or Just Drawn Close Together
12–18 minutes -
How to Tell “Time to Reach” From “Value After the Same Time” in PSLE Science
12–17 minutes -
How to Read a PSLE Science Process That Branches Into Different Outcomes Depending on the Condition
12–18 minutes -
Top 10 Goal-Setting Skills Worth Learning
13–20 minutes -
Top 10 Collaboration Skills Worth Learning
11–16 minutes -
Top 10 Communication Skills Worth Learning
11–17 minutes -
Top 10 Explanation Skills Worth Learning
17–25 minutes -
Top 10 Synthesis Skills Worth Learning
15–23 minutes -
Top 10 Verification Skills Worth Learning
17–25 minutes -
How to Tell Whether a PSLE Science Measurement Is the Outcome or a Check on a Controlled Condition
13–19 minutes -
How to Read a PSLE Science Time Graph When the Condition Changes Partway Through
11–17 minutes -
How to Read an Average PSLE Science Result Without Treating It as Every Trial or Every Specimen
11–17 minutes -
How to Tell Whether a PSLE Science Sequence Shows One Object Changing or Several Different Objects
11–17 minutes -
How to Tell the Condition You Set From the Condition a PSLE Science Specimen Actually Experiences
13–20 minutes -
How to Keep Paired PSLE Science Labels and Values Aligned Without Swapping Which Result Belongs to Which Set-Up
11–16 minutes -
How to Read a PSLE Science Result That Returns to Its Starting Value Without Concluding Nothing Happened
11–16 minutes -
How to Move From Open-Book to Closed-Book PSLE Science Practice Without Removing Support Too Early
13–20 minutes -
How to Analyse a PSLE Science Process Without Turning It Into a List of Stages
12–18 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.
