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 5 Science Tuition | Why Do Plants Wilt Without Water?
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Primary 5 Science Tuition | Why Do We Breathe Faster After Exercise?
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Primary 5 Science Tuition | Why Do Wet Clothes Dry Faster? Evaporation, Heat, Wind and Surface Area
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Primary 5 Science Tuition | Why Does a Bulb Light Only in a Complete Circuit?
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Primary 5 Science Tutor | Curie Series | Integrated Systems, Variables and Evidence
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Primary 5 Science | When Science Becomes a Systems Problem | Darwin × Voyage
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Primary 5 to Primary 6 Mathematics Bridge | Algebra & Unknowns from Number Sentences, Models & Inverse Thinking
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Primary 5 to Primary 6 Mathematics Bridge | Average from Totals, Equal Sharing & Data
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Primary 5 to Primary 6 Mathematics Bridge | Ratio from Fractions, Rate & Multiplicative Comparison
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Primary 5 to Primary 6 Mathematics Bridge | Speed from Rate, Time & Unit Conversion
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Primary 5 Tuition Sengkang | Building the PSLE Engine Before the Final Year
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Primary 5 → Primary 6 Mathematics Bridge | Percentage Difference, Percentage Change & Changing Reference Bases
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Primary 6 English Learning Guide | Articles, Determiners and Quantifiers: Reference, Quantity and Scope
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Primary 6 English Learning Guide | Cause, Contrast, Sequence and Comparison: Reading Logical Relationships
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Primary 6 English Learning Guide | Composition Sentence Craft, Cohesion and Paragraph Flow
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Primary 6 English Learning Guide | Comprehension Cloze: Cohesion, Context and Whole-Text Meaning
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Primary 6 English Learning Guide | Comprehension Question Types and Answer Precision
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Primary 6 English Learning Guide | Continuous Writing: Picture Stimulus Selection and Integration
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Primary 6 English Learning Guide | Continuous Writing: Topic, Plot and Revision
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Primary 6 English Learning Guide | Exam Error Analysis, Correction and Transfer
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Primary 6 English Learning Guide | Exam Simulation, Stamina, Time Control and Recovery
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Primary 6 English Learning Guide | Final PSLE Revision and the Secondary 1 Handover
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Primary 6 English Learning Guide | Grammar Cloze, Editing and Sentence Control
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Primary 6 English Learning Guide | Grammar for Meaning: Modality, Conditionals, Reported Speech and Passive Voice
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Primary 6 English Learning Guide | Independent Weekly Revision: Retrieval, Spacing, Transfer and Self-Checking
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Primary 6 English Learning Guide | Inference Across Paragraphs: Motive, Change and Evidence Boundaries
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Primary 6 English Learning Guide | Listening Comprehension: Preview, Evidence and Distractor Control
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Primary 6 English Learning Guide | Listening Comprehension: Selective Note-Taking, Numbers, Speakers and Change Signals
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Primary 6 English Learning Guide | Listening, Oral, Examination Control and the Secondary 1 Bridge
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Primary 6 English Learning Guide | Metacognition, Self-Checking and Independent Exam Control
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Primary 6 English Learning Guide | Non-Fiction Reading: Claims, Evidence, Fact, Opinion and Reliability
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Primary 6 English Learning Guide | Open-Ended Answer Editing: Precision, Completeness and Meaning
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Primary 6 English Learning Guide | Oral Communication: Reading Aloud and Stimulus-based Conversation
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Primary 6 English Learning Guide | Oral on Unfamiliar Topics: Reasoning Without Specialised Knowledge or Prepared Scripts
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Primary 6 English Learning Guide | Paper 2 Mixed-Skill Switching and Diagnostic Practice
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Primary 6 English Learning Guide | Phrasal Verbs, Idioms and Fixed Expressions: Meaning, Register and Natural Use
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Primary 6 English Learning Guide | Prepositions and Fixed Collocations: Time, Place, Movement and Natural Usage
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Primary 6 English Learning Guide | PSLE English Myths and False Rules: What the 2026 Examination Actually Requires
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Primary 6 English Learning Guide | Punctuation and Sentence Boundaries: Commas, Apostrophes and Dialogue
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Primary 6 English Learning Guide | Question Command Words and Answer Forms
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Primary 6 English Learning Guide | Reading Aloud: Phrasing, Stress, Pace, Pronunciation and Recovery
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Primary 6 English Learning Guide | Reading Under Time: Passage Navigation, Evidence and Recovery
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Primary 6 English Learning Guide | Reading, Comprehension, Inference and Evidence
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Primary 6 English Learning Guide | Reference, Pronouns and Cohesion: Tracking Meaning Across a Passage
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Primary 6 English Learning Guide | Situational Writing: Content Points and Tone
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Primary 6 English Learning Guide | Situational Writing: Source-Pack Selection, Transformation and Task Accuracy
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Primary 6 English Learning Guide | Spelling, Morphology and Word Formation in Editing
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Primary 6 English Learning Guide | Stimulus-Based Conversation: Opinion, Reason, Example, Follow-Up and Recovery
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Primary 6 English Learning Guide | Subject–Verb Agreement: Finding the True Subject
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Primary 6 English Learning Guide | Synthesis and Transformation: Meaning Preservation
Browse every published Post
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How to Tell Whether a PSLE Science Count Means Objects, Events or Measurements
5–8 minutes -
How to Answer “Determine” Questions in PSLE Science Without Turning Determination Into Explanation
5–7 minutes -
How to Read a Corrected PSLE Science Measurement Without Counting the Old Value as Extra Evidence
6–9 minutes -
How to Tell the Presence of a PSLE Science Condition From Its Amount or Level
7–11 minutes -
How to Combine Evidence From Two PSLE Science Investigations Without Merging Different Questions
6–9 minutes -
How to Check Whether a PSLE Science Method Improvement Actually Fixes the Flaw
7–10 minutes -
How to Tell a Real PSLE Science Plateau From a Measuring-Instrument Limit
7–11 minutes -
How to Reclassify the Same PSLE Science Objects When the Criterion Changes
10–15 minutes -
How to Tell When Two Similar-Looking PSLE Science Questions Need Different Concepts
11–16 minutes -
How to Compare PSLE Science Photographs Without Mistaking Camera Perspective for Scientific Change
8–11 minutes -
How to Read a Locally Defined Score or Index in PSLE Science Without Treating It as a Standard Unit
7–10 minutes -
How to Tell Preliminary Trial Data From Final Evidence in a PSLE Science Investigation
7–11 minutes -
How to Keep Later Information in a PSLE Science Multi-Part Question From Rewriting What You Could Know Earlier
8–12 minutes -
How to Design a PSLE Science Results Table Before Collecting the Data
13–20 minutes -
How to Keep Your Own Earlier Answer Separate From Given Evidence in a PSLE Science Structured Question
12–18 minutes -
How to Use Mark Allocation in a 2026 PSLE Science Structured Question Without Turning Marks Into a Sentence Formula
13–20 minutes -
How to Answer “Infer” Questions in PSLE Science Without Treating an Inference as an Observation
12–18 minutes -
How to Tell a Replication From an Extension in a PSLE Science Follow-Up Investigation
12–17 minutes -
How to Diagnose a PSLE Science Failure After a Delay: Recall, Condition Tracking or Transfer?
12–18 minutes -
How to Tell When a Missing Value in a PSLE Science Table Can Be Inferred—and When It Must Stay Unknown
10–16 minutes -
How to Answer “Justify” Questions in PSLE Science Without Repeating Your Choice
9–13 minutes -
How to Test a PSLE Science MCQ Option That Is True Only Under an Unstated Condition
11–16 minutes -
How to Decide What a PSLE Science Investigation Can Still Tell You After You Find a Method Flaw
10–15 minutes -
How to Decide Whether to Join Data Points in a PSLE Science Graph Without Inventing Unmeasured Results
10–15 minutes -
How to Answer “What Is Meant By” in PSLE Science Without Giving an Example Instead of a Definition
10–15 minutes -
How to Decide When to Check Feedback in PSLE Science Practice Without Turning the Answer Into a Copying Exercise
10–14 minutes -
How to Use PSLE Science Data Collected by Another Student Without Inventing the Missing Method
10–15 minutes -
How to Tell Observational Evidence From Experimental Evidence in a PSLE Science Question Without Inventing a Changed Variable
9–14 minutes -
How to Check a PSLE Science Revision Resource Against the Current Syllabus Without Throwing Away Useful Enrichment
10–15 minutes -
How to Evaluate PSLE Science Observations, Information and Methods Without Jumping Straight to “Improve It”
7–10 minutes -
How to Analyse PSLE Science Information by Finding Parts, Patterns and Relationships
6–9 minutes -
How to Answer “Differentiate” Questions in PSLE Science Without Turning Them Into a General Comparison
5–7 minutes -
How to Answer “Identify” and “List” Questions in PSLE Science Without Over-Explaining
6–10 minutes -
How to Tell When a PSLE Science Instrument Reading Is Lagging Behind the System
10–16 minutes -
How to Check a PSLE Science Practice Answer Key When It Seems Wrong
9–14 minutes -
How to Practise PSLE Science With a Study Partner Without Copying Each Other’s Reasoning
10–15 minutes -
How to Tell Whether PSLE Science Categories Overlap Before Adding Their Counts
9–13 minutes -
Top 10 Research Skills Worth Learning
12–18 minutes -
How to Construct a PSLE Science Set-Up From a Given Plan Without Changing the Investigation
10–14 minutes -
How to Use a Reference Value to Check a PSLE Science Measuring Instrument Before Trusting Its Readings
8–12 minutes -
How to Tell Repeatability From Reproducibility in PSLE Science When Another Learner Repeats the Method
8–12 minutes -
How to Tell Measurement Precision From Accuracy in PSLE Science Without Assuming Repeated Agreement Means Correct
9–13 minutes -
How to Tell a Controlled Condition From a Condition That Only Happened to Stay the Same in PSLE Science
7–11 minutes -
How to Tell When the Same PSLE Science Concept Requires a Different Reasoning Job
8–11 minutes -
How to Spot When Changing One PSLE Science Variable Automatically Changes Another
8–12 minutes -
How to Tell When PSLE Science Evidence Shows the Direction of Change but Not How Large the Change Is
7–11 minutes -
How to Read a PSLE Science Measurement After an Instrument Is Reset to Zero Without Losing the Reference
8–12 minutes -
How to Tell Whether a Measurement Error Shifts Both PSLE Science Set-Ups Together or Creates a False Difference
7–10 minutes -
How to Tell Whether Two PSLE Science Observations Are Independent Checks or Two Effects of the Same Event
8–11 minutes -
How to Read the Same Whole-System Total When the Parts Can Be Distributed Differently in PSLE Science
7–11 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.
