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 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
3746 results found
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Student/Studying Interface Learning Manual: Voice-Control Study Interface | Saying the Right Command Is Not Enough If the Wrong Control Activates
5–7 minutes -
MindOS Learning Manual: Retroactive-Interference State | New Learning Can Make Older Learning Harder to Retrieve
10–15 minutes -
Student/Studying Interface Learning Manual: Refreshable-Braille Interface | Reading One Line at a Time Should Not Make the Document Lose Its Structure
5–7 minutes -
Bolt Performance Calibration — A Superscore Can Combine Your Best Sections Without Representing Any Single Test Sitting
9–13 minutes -
Student/Studying Interface Learning Manual: Study-Chat Interface | A Useful Answer Can Disappear Above Fifty New Messages
4–7 minutes -
Bolt Performance Calibration — Negative Marking Can Measure Risk Strategy as Well as Knowledge
9–13 minutes -
Student/Studying Interface Learning Manual: Handwriting-Recognition Interface | The Ink Can Be Right and the Converted Text Wrong
5–7 minutes -
Student/Studying Interface Learning Manual: Slide-Deck Interface | A Presentation Can Look Complete While Hiding the Explanation in Notes, Builds or Missing Context
6–9 minutes -
Student/Studying Interface Learning Manual: Computer Algebra System Interface | A Symbolic Answer Can Be Correct and Still Hide the Conditions That Make It True
5–7 minutes -
Student/Studying Interface Learning Manual: Digital Measurement-Tool Interface | A Ruler or Protractor on Screen Can Be Perfectly Aligned and Still Measure the Wrong Thing
5–8 minutes -
Bolt Performance Calibration — Two Assessments Can Correlate Strongly and Still Disagree About Individual Scores
8–12 minutes -
Student/Studying Interface Learning Manual: Interactive-Timeline Interface | Seeing Events in Order Is Not the Same as Understanding Which Time State You Are Viewing
4–6 minutes -
Bolt Performance Calibration — A Statistically Significant Result Can Still Be Too Small to Matter Educationally
8–12 minutes -
Student/Studying Interface Learning Manual: Virtual-Microscope Interface | More Magnification Can Show Less of What Matters
5–7 minutes -
Bolt Performance Calibration — Scores Improved After the Programme. Would They Have Improved Anyway?
8–12 minutes -
Student/Studying Interface Learning Manual: Access-Permission Interface | The Right Resource Is Still Unusable If the Learner Cannot Open It
5–8 minutes -
Bolt Performance Calibration — Three Hundred Students in Six Classes Are Not Three Hundred Independent Experiments
8–12 minutes -
Bolt Performance Calibration — If You Measure Enough Outcomes, One Success Can Appear by Chance
7–11 minutes -
Bolt Performance Calibration — If Two Groups Start Different, the Final Difference May Not Be the Intervention
8–12 minutes -
Student/Studying Interface Learning Manual: File-Format Conversion Interface | The Same Work Can Change When It Becomes PDF, DOCX, CSV or an Image
7–10 minutes -
MindOS Learning Manual: Incubation State | Stepping Away Can Help a Stuck Problem—But Only After the Problem Has Been Loaded
9–14 minutes -
Student/Studying Interface Learning Manual: 3D-Model Interface | Rotating the Object Can Reveal Structure and Hide Orientation
6–9 minutes -
Student/Studying Interface Learning Manual: Sensor & Data-Logger Interface | A Precise Reading Is Not Useful If the Learner Does Not Know What Was Measured
5–8 minutes -
MindOS Learning Manual: Collaborative-Inhibition State | A Group Can Recall Less Than Its Members Would Recall Separately
9–14 minutes -
Student/Studying Interface Learning Manual: Interactive-Map Interface | A Map Can Be Accurate and Still Answer the Wrong Question
6–9 minutes -
MindOS Learning Manual: Pretraining State | Learn the Parts Before the System Starts Moving
9–13 minutes -
Student/Studying Interface Learning Manual: Code-Execution Interface | Running Without Knowing What State Ran Can Make Correct Code Look Wrong
7–10 minutes -
MindOS Learning Manual: Rereading State | Reading It Again Can Help—But Easier Reading Is Not the Same as Better Learning
13–19 minutes -
Bolt Performance Calibration — If Students Saw the Questions Before the Test, the Score Is Measuring a Different Performance
7–11 minutes -
Bolt Performance Calibration — A Growth Score Can Be Noisier Than Either Test It Came From
7–11 minutes -
Bolt Performance Calibration — If the Control Group Starts Copying the Intervention, the Comparison Stops Being Clean
7–11 minutes -
Bolt Performance Calibration — If the Missing Students Are Different, the Intervention Effect Can Change
8–12 minutes -
Bolt Performance Calibration — When Students Choose Different Questions, the Same Mark Can Come From Different Test Forms
9–13 minutes -
Student/Studying Interface Learning Manual: Graphing-Tool Interface | A Correct Equation Can Look Wrong When the Window Is Wrong
8–12 minutes -
Student/Studying Interface Learning Manual: Audio-Description Interface | Hearing the Dialogue Is Not the Same as Receiving the Visual Information
7–11 minutes -
Bolt Performance Calibration — A Mathematics or Science Test Can Become Partly a Language Test
9–14 minutes -
Student/Studying Interface Learning Manual: Spreadsheet Interface | A Correct Number Can Become Meaningless When Its Row, Column or Formula State Is Lost
8–12 minutes -
Bolt Performance Calibration — Two Students Can Answer Different Adaptive-Test Questions and Still Be on the Same Score Scale
9–14 minutes -
MindOS Learning Manual: Cue-Overload State | One Hint Can Point to Too Many Memories
8–12 minutes -
Student/Studying Interface Learning Manual: Keyboard-Focus Interface | The Cursor Can Move Even When the Learner Does Not Know What Will Activate
7–10 minutes -
Bolt Performance Calibration — A Raw Score and a Scaled Score Are Not the Same Kind of Number
8–12 minutes -
Student/Studying Interface Learning Manual: Screen-Reader Navigation Interface | Hearing Every Word Is Not the Same as Knowing Where You Are
7–10 minutes -
Bolt Performance Calibration — A Correct Multiple-Choice Answer Does Not Always Mean the Student Knew It
8–12 minutes -
Bolt Performance Calibration — A Peer Grade Is Evidence, Not a Substitute Teacher
7–11 minutes -
MindOS Learning Manual: Self-Reference Encoding State | Making It About You Can Make It Easier to Remember—But That Is Not Yet Understanding
10–16 minutes -
Bolt Performance Calibration — A Wrong Final Answer Can Still Contain Correct Performance Evidence
7–11 minutes -
Student/Studying Interface Learning Manual: Digital-Form Interface | Knowing the Answer Is Not Enough If It Goes Into the Wrong Field
7–11 minutes -
Bolt Performance Calibration — A Group Grade Is Not Automatically an Individual Capability Score
7–11 minutes -
Student/Studying Interface Learning Manual: Equation-Editor Interface | A Correct Idea Can Become a Wrong Equation When the Input Tool Changes the Structure
6–9 minutes -
MindOS Learning Manual: Forward-Testing State | Testing Earlier Material Can Improve What You Learn Next
10–14 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.
