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 4 Science Tuition Sengkang | Relationships, Evidence & Explanation
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Primary 4 Science Tuition | Building the P5 and PSLE Corridor Early
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Primary 4 Science Tuition | Experiments, Data and Scientific Conclusions
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Primary 4 Science Tuition | For Beginners | Mastering Primary 4 Science: Tuition for Beginners
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Primary 4 Science Tuition | How Do Leaves Help Plants Make Food?
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Primary 4 Science Tuition | How Do We See Objects? Light Sources, Reflection and Visibility
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Primary 4 Science Tuition | How Does Food Move Through the Digestive System?
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Primary 4 Science Tuition | How to Change Shadow Size
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Primary 4 Science Tuition | Solids, Liquids and Gases: How to Tell the Three States of Matter Apart
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Primary 4 Science Tuition | Why Do Plants Need Roots, Stems and Leaves?
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Primary 4 Science Tuition | Why Do We Chew Food? Digestion, Food Size and the Digestive System
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Primary 4 Science Tuition | Why Does a Metal Spoon Get Hot in Soup?
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Primary 4 Science Tuition | Why Does Air Have Mass and Occupy Space?
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Primary 4 Science Tuition | Why Does Ice Melt and Water Freeze?
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Primary 4 Science Tuition | Why Metal Feels Colder Than Wood
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Primary 4 Science Tutor | Curie Series | Systems, Matter, Light and Heat as Mechanisms
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Primary 4 Science | When Facts Have to Become Relationships | Darwin × Voyage
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Primary 4 Science | Why Explanation Beats Memorisation
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Primary 4 Tuition Sengkang | From Foundations to Upper-Primary Reasoning
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Primary 4 → Primary 5 Mathematics Readiness Bridge | Prerequisites, Dependencies and Transition
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Primary 5 English Learning Guide | Collaborative Discussion: Turn-Taking, Clarification, Building on Ideas and Respectful Disagreement
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Primary 5 English Learning Guide | Comparing Two Texts: Similarities, Differences, Purpose and Evidence
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Primary 5 English Learning Guide | Comprehension Question Types and Answer Precision
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Primary 5 English Learning Guide | Consolidation and the Primary 6 Handover
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Primary 5 English Learning Guide | Continuous Writing: Plot, Character, Development and Revision
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Primary 5 English Learning Guide | Descriptive Writing: Observation, Sensory Detail, Precise Nouns, Verbs and Comparison
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Primary 5 English Learning Guide | Dialogue and Punctuation: Speech, Reporting Clauses, Voice and Meaning
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Primary 5 English Learning Guide | Email and Digital Message Writing: Purpose, Audience, Subject, Tone and Complete Information
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Primary 5 English Learning Guide | Error Analysis, Self-Correction, Retrieval and Transfer
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Primary 5 English Learning Guide | Explanatory Writing: How, Why, Cause, Process and Precision
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Primary 5 English Learning Guide | Fact, Opinion, Inference and Evidence
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Primary 5 English Learning Guide | Figurative and Idiomatic Meaning in Context: Simile, Metaphor, Personification, Idioms and Proverbs
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Primary 5 English Learning Guide | Grammar Cloze, Editing and Sentence Control
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Primary 5 English Learning Guide | Independent Reading: Book Choice, Response and Building a Reading Life
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Primary 5 English Learning Guide | Independent Study Routines for English: Retrieval, Spacing, Error Return, Transfer and Planning
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Primary 5 English Learning Guide | Information Synthesis Across Text and Visual Sources: Main Idea, Evidence and Integration
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Primary 5 English Learning Guide | Informational and Functional Writing: Purpose, Audience, Notes, Messages and Instructions
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Primary 5 English Learning Guide | Listening Comprehension: Main Ideas, Details, Change and Distractors
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Primary 5 English Learning Guide | Nonfiction and Informational Reading: Main Idea, Text Structure, Comparison and Evidence
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Primary 5 English Learning Guide | Opinion Writing: Claim, Reasons, Examples, Audience and Revision
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Primary 5 English Learning Guide | Oral Communication: Reading Aloud, Stimulus Conversation and Idea Development
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Primary 5 English Learning Guide | Parts of Speech in Context: Nouns, Verbs, Adjectives, Adverbs and Prepositions
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Primary 5 English Learning Guide | Personal Recount Writing: Chronology, Significant Moments, Reflection and Voice
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Primary 5 English Learning Guide | Poetry and Literary Language: Imagery, Sound, Character, Theme and Evidence
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Primary 5 English Learning Guide | Presentation Skills: Planning, Signposting, Voice, Visuals, Questions and Recovery
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Primary 5 English Learning Guide | Procedural Writing: Goal, Materials, Sequence, Conditions and Testing
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Primary 5 English Learning Guide | Pronouns, Articles and Reference Chains: Clarity, Cohesion and Meaning
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Primary 5 English Learning Guide | Question Generation and Metacognitive Reading: Prediction, Monitoring and Repair
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Primary 5 English Learning Guide | Reading Fluency, Phrasing, Silent Reading Stamina and Strategic Rereading
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Primary 5 English Learning Guide | Reading Multi-Step Instructions and Task Language: Sequence, Conditions, Constraints, Sources and Checking
Browse every published Post
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MindOS Learning Manual: Attention State | Looking at the Page Is Not the Same as Attending
7–10 minutes -
MindOS Learning Manual: Scaffold Fading State | Help Is Successful When It Can Disappear
6–10 minutes -
MindOS Learning Manual: Worked Example State | Seeing a Solution Is Not the Same as Learning the Route
5–8 minutes -
MindOS Learning Manual: Interleaving State | Practice Should Not Always Tell You Which Method to Use
5–8 minutes -
MindOS Learning Manual: Spacing State | One Long Study Session Is Not the Same as Learning Over Time
5–8 minutes -
MindOS Learning Manual: Feedback State | “Wrong” Is Not a Repair Instruction
6–8 minutes -
MindOS Learning Manual: Transfer State | Perfect Practice Does Not Mean You Can Solve a New Problem
5–8 minutes -
MindOS Learning Manual: Strategy Selection | Knowing Five Methods Is Not Knowing Which Method to Use
5–7 minutes -
MindOS Learning Manual: Representation State | Can You See the Same Idea Another Way?
6–8 minutes -
MindOS Learning Manual: The AI Assistance Gradient | When Help Becomes Substitution
10–15 minutes -
MindOS Learning Manual: Retrieval State | Familiarity Is Not Availability
8–12 minutes -
MindOS Learning Manual: Working Memory Load | Why a Student Can Know Every Step and Still Lose the Problem
9–13 minutes -
MindOS Learning Manual: The Study Runtime | What Should a Learner Do Next?
9–14 minutes -
Problems | Education | Reflective | A Corrected Answer Is Not Necessarily a Repaired Mistake
7–11 minutes -
Problems | Education | Reflective | The Mark Arrives After the Problem
8–11 minutes -
Problems | Education | Reflective | More Work Is Not Always More Learning
7–10 minutes -
Problems | Education | Reflective | Sometimes We Move the Goalpost Too Quickly
7–11 minutes -
Problems | Education | Reflective | Slow Is Not a Diagnosis
7–10 minutes -
Problems | Education | Reflective | Sometimes We Are Looking at Different Versions of the Same Child
7–11 minutes -
Problems | Education | Reflective | Knowing It Yesterday Is Not the Same as Having It Today
6–9 minutes -
Problems | Education | Reflective | Sometimes the Student Is Not Stuck. They Are Waiting.
7–10 minutes -
Problems | Education | Reflective | A Good Lesson Should Leave Evidence
7–11 minutes -
Problems | Education | Reflective | A Child Does Not Need Help Everywhere
7–10 minutes -
What is Education | What Is Education’s Reason for Existence?
6–8 minutes -
What is Education | What If Education Was Removed?
8–12 minutes -
What is Education | Every Child Arrives Late
10–16 minutes -
What Is Education?
6–10 minutes -
Examination Craft | The Missing Subject
8–12 minutes -
Examination Craft | How to Survive a Paper
9–13 minutes -
Examination Craft | How to Survive the Season
10–15 minutes -
Rebirth
9–14 minutes -
Life After Death
10–14 minutes -
The Cycle of Education
8–12 minutes -
The Tutor Is in The Construction Business
10–15 minutes -
Problems | Education | Reflective | Learning Skills Are Abstract But Buildable
24–36 minutes -
Problems | Education | Reflective | Knowing Our Jobs
12–17 minutes -
Problems | Education | Reflective | The Problem Becomes the Lesson
9–14 minutes -
Problems | Education | Reflective | The Invisible Education
7–10 minutes -
Problems | Education | Reflective | Is Tuition Really Too Taxing?
10–15 minutes -
Problems | Education | Reflective | The Oddity of Giving One Lesson to Three Students
10–15 minutes -
Problems | Education | Reflective | Preparing for Examinations: Why Studying Skills Need to Change
9–13 minutes -
Problems | Education | Reflective | Students Say More When They Say Less
11–16 minutes -
Problems | Education | Reflective | Schools Versus Education
9–14 minutes -
Problems | Education | Reflective | How We Think Tutoring Might Be On The Wrong Track
12–18 minutes -
Problems | Education | Reflective | How Solutions Sometimes Aren’t Enough
8–13 minutes -
Problems | Education | Reflective | Why Tuition
8–12 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.
