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
2756 results found
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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
3746 results found
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Student/Studying Interface Learning Manual: Pagination Interface | Page 8 Means Nothing If You Cannot Tell What Changed Between Pages
3–5 minutes -
MindOS Learning Manual: Modality State | When the Eyes Are Doing Two Jobs at Once
12–18 minutes -
Student/Studying Interface Learning Manual: Multiple-Selection Interface | One Batch Action Can Change Five Study Objects You Did Not Mean to Select
4–6 minutes -
Student/Studying Interface Learning Manual: Undo & Redo Interface | Undo Can Repair the Last Action and Erase the Right One Before It
3–5 minutes -
Student/Studying Interface Learning Manual: Sort & Filter Interface | The Right Resource Can Disappear When the List Changes
3–5 minutes -
Student/Studying Interface Learning Manual: Bookmark & Favorites Interface | Saving the Page Is Not the Same as Saving Why You Needed It
4–6 minutes -
Student/Studying Interface Learning Manual: Copy-Paste Context Interface | The Sentence Can Survive While Its Source Disappears
4–7 minutes -
MindOS Learning Manual: Retrieval-Organization State | Memory Can Hold More Than an Unstructured Search Can Find
11–16 minutes -
Student/Studying Interface Learning Manual: Icon-Button Interface | A Familiar Symbol Is Not Always a Clear Study Action
3–5 minutes -
Student/Studying Interface Learning Manual: Status-Message Interface | “Saved” and “Still Saving” Are Different Study States
3–5 minutes -
Student/Studying Interface Learning Manual: Carousel Interface | The Next Slide Can Arrive Before You Finish the Current Study Object
3–5 minutes -
Student/Studying Interface Learning Manual: Skip-Link Interface | Repeated Navigation Should Not Stand Between You and the Study Object
3–5 minutes -
Student/Studying Interface Learning Manual: Breadcrumb Interface | Knowing the Page Name Is Not the Same as Knowing Where You Are
4–5 minutes -
Student/Studying Interface Learning Manual: Tree & Folder Navigation Interface | Expanding the Folder Is Not the Same as Knowing Which File You Are Studying
4–6 minutes -
Student/Studying Interface Learning Manual: Tabbed-Panel Interface | The Right Resource Can Be Open Under the Wrong Tab
4–6 minutes -
Student/Studying Interface Learning Manual: Session-Timeout Interface | A Study Platform Can Keep the Lesson and Lose Your Working State
4–5 minutes -
Student/Studying Interface Learning Manual: Accordion & Disclosure Interface | The Answer Can Be on the Page and Still Hidden Behind the Wrong Heading
3–5 minutes -
Student/Studying Interface Learning Manual: Modal-Dialog Interface | A Helpful Pop-Up Can Solve One Problem and Lose the Place You Came From
5–7 minutes -
MindOS Learning Manual: Expertise-Reversal State | The Help That Built the Skill Can Later Get in the Way
11–16 minutes -
Student/Studying Interface Learning Manual: Audio Study Interface | Hearing the Whole Lecture Does Not Preserve the Part You Need
4–7 minutes -
Student/Studying Interface Learning Manual: Split-Screen Study Interface | Two Windows Can Be Open and the Study Route Still Be Lost
4–7 minutes -
Student/Studying Interface Learning Manual: Infinite-Scroll Interface | If the Page Has No End, the Learner Still Needs a Place to Return To
5–7 minutes -
Student/Studying Interface Learning Manual: Animation-Control Interface | If the Meaning Moves, the Learner Needs a Way to Stop the Moment
4–6 minutes -
Student/Studying Interface Learning Manual: Error-Message Recovery Interface | “Something Went Wrong” Is Not a Study Plan
5–7 minutes -
MindOS Learning Manual: Proactive-Interference State | Old Learning Can Make New Learning Harder to Retrieve
10–15 minutes -
Student/Studying Interface Learning Manual: Hover & Tooltip Interface | The Explanation Can Vanish When the Pointer Moves Toward It
4–6 minutes -
Student/Studying Interface Learning Manual: Touch-Target Interface | The Right Button Can Exist and Still Be Hard to Activate
4–6 minutes -
Student/Studying Interface Learning Manual: Reflowable E-Book Interface | Page 42 Can Move While the Book Stays the Same
4–6 minutes -
Student/Studying Interface Learning Manual: Drag-and-Drop Study Interface | Moving the Right Item Is Not the Same as Landing It in the Right State
4–6 minutes -
Student/Studying Interface Learning Manual: Color-Encoding Interface | If Red and Green Carry the Only Difference, Part of the Study Object Can Disappear
4–7 minutes -
Student/Studying Interface Learning Manual: Data-Table Navigation Interface | A Cell Is Meaningless When Its Row and Column Headers Disappear
5–7 minutes -
Student/Studying Interface Learning Manual: Reader-Mode Interface | Removing Page Clutter Can Also Remove Part of the Study Object
5–7 minutes -
Student/Studying Interface Learning Manual: Switch-Control Study Interface | Scanning Past the Right Button Can Turn One Action Into a Navigation Loop
4–6 minutes -
Student/Studying Interface Learning Manual: Accessible-Mathematics Interface | An Equation Can Look Correct and Still Be Unreadable to the Study Tool
5–7 minutes -
Student/Studying Interface Learning Manual: Reference-Manager Interface | A Perfectly Formatted Citation Can Still Point to the Wrong Source
5–8 minutes -
MindOS Learning Manual: Spatial-Contiguity State | If Related Information Is Too Far Apart, the Learner Spends Effort Searching Instead of Learning
8–11 minutes -
MindOS Learning Manual: Claim–Evidence Reasoning State | A Fact Is Not Evidence Until You Can Explain What It Supports
8–13 minutes -
MindOS Learning Manual: Memory-Conformity State | Someone Else’s Answer Can Change What You Think You Remember
8–12 minutes -
MindOS Learning Manual: Wakeful-Rest State | What You Do Immediately After Learning Can Change What Survives
8–12 minutes -
MindOS Learning Manual: Illusory-Truth State | Repetition Can Make a Claim Feel Truer Without Making It True
6–9 minutes -
MindOS Learning Manual: Source-Evaluation State | A Professional-Looking Source Can Still Be Weak Evidence
8–11 minutes -
MindOS Learning Manual: Signaling State | A Highlight Helps Only If It Points to the Structure That Matters
8–11 minutes -
MindOS Learning Manual: Segmentation State | A Long Explanation Can Be Correct and Still Arrive Too Fast to Learn
8–12 minutes -
Bolt Performance Calibration — A Precise Class Average Does Not Mean Every Student Was Measured Precisely
9–13 minutes -
Bolt Performance Calibration — The Same Performance Can Look Different Under Holistic and Analytic Scoring
8–12 minutes -
Bolt Performance Calibration — Change the Component Weights and You Change What the Total Score Means
8–12 minutes -
Bolt Performance Calibration — A “Grade 8 Reading Level” Does Not Mean a Younger Student Is Ready for Grade 8 Curriculum
9–13 minutes -
MindOS Learning Manual: Test-Expectancy State | How You Expect to Be Tested Can Change How You Study
11–16 minutes -
MindOS Learning Manual: Segmenting State | A Continuous Explanation Can Be Correct and Still Move Too Fast to Build
10–15 minutes -
MindOS Learning Manual: Directed-Forgetting State | Sometimes the Right Learning Move Is to Stop Rehearsing What No Longer Matters
9–14 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.
