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 Learning Guide | Mastery Diagnostic & Repair Lab
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Primary 5 Science Learning Guide | Measurement, Units, Range & Resolution
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Primary 5 Science Learning Guide | Mixed-Concept Transfer Challenge Lab
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Primary 5 Science Learning Guide | Models, Assumptions, Simplification & Limits
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Primary 5 Science Learning Guide | Observation, Inference, Prediction & Conclusion
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Primary 5 Science Learning Guide | Open-Ended Answer Construction Application Lab
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Primary 5 Science Learning Guide | Plant & Human Reproduction Comparison, Sequence & Evidence
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Primary 5 Science Learning Guide | Plant & Human Systems Application Lab
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Primary 5 Science Learning Guide | Plant Transport, Respiratory & Circulatory Systems
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Primary 5 Science Learning Guide | Pollination, Fertilisation, Seeds & Fruits
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Primary 5 Science Learning Guide | Practical Planning, Data Recording & Conclusions
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Primary 5 Science Learning Guide | Primary 5 to Primary 6 Bridge, Consolidation & the PSLE Runway
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Primary 5 Science Learning Guide | Question Deconstruction, Conditions & Constraints
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Primary 5 Science Learning Guide | Rates, Time, Change & Comparative Reasoning
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Primary 5 Science Learning Guide | Reliability, Accuracy, Validity & Data Quality
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Primary 5 Science Learning Guide | Reproduction Application Lab
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Primary 5 Science Learning Guide | Reproduction in Plants and Humans
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Primary 5 Science Learning Guide | Retrieval, Spaced Review & Concept Transfer
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Primary 5 Science Learning Guide | Scaling, Ratios, Proportional Thinking & Estimation
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Primary 5 Science Learning Guide | Scientific Communication & Evidence Chains
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Primary 5 Science Learning Guide | Scientific Vocabulary & Precision Challenge Lab
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Primary 5 Science Learning Guide | Self-Checking & Exam Readiness Challenge Lab
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Primary 5 Science Learning Guide | Sequence, Cycles, Dependencies & Order of Events
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Primary 5 Science Learning Guide | Structure, Function, Systems & Cause-and-Effect
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Primary 5 Science Learning Guide | Variables, Fair Tests & Experimental Design
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Primary 5 Science Learning Guide | Water & Food Transport in Plants
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Primary 5 Science Learning Guide | Water & State Change Application Lab
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Primary 5 Science Learning Guide | Water, Changes of State, the Water Cycle & Evidence
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Primary 5 Science Learning Guide | What-If Changes & System Failure Reasoning
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Primary 5 Science Learning Hub | Water, Reproduction, Systems & Electricity
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Primary 5 Science Punggol | Legacy Entry to Systems & Variables
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Primary 5 Science Punggol | Systems, Variables & the PSLE Runway
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Primary 5 Science Sengkang | Systems & Variables Diagnostic
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Primary 5 Science Sengkang | The Voyage of Water
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Primary 5 Science Tuition Punggol | Systems, Variables and Interactions | The Voyage Series
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Primary 5 Science Tuition Sengkang | Systems, Variables & PSLE Foundations
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Primary 5 Science Tuition | Answering Techniques for Open-Ended Questions
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Primary 5 Science Tuition | Conductors and Insulators in Electrical Circuits
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Primary 5 Science Tuition | For Beginners: The Year Science Becomes Serious
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Primary 5 Science Tuition | How Are Seeds Dispersed? Wind, Water, Animals and Explosive Action
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Primary 5 Science Tuition | How Do Water and Food Move Through Plants?
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Primary 5 Science Tuition | How Does Blood Transport Oxygen and Carbon Dioxide?
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Primary 5 Science Tuition | Pollination, Fertilisation, Seeds and Fruits
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Primary 5 Science Tuition | The PSLE Science Engine Year
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Primary 5 Science Tuition | The Revision System for the Year Before PSLE
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Primary 5 Science Tuition | What Do Seeds Need to Germinate? Water, Air and Suitable Warmth
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Primary 5 Science Tuition | What Happens When One Bulb Is Removed? Series and Parallel Circuits
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Primary 5 Science Tuition | Where Will Water Droplets Form?
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Primary 5 Science Tuition | Which Switch Controls Which Bulb?
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Primary 5 Science Tuition | Why Do Bulbs Get Dimmer? Circuit Changes and Brightness
Browse every published Post
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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 -
Student/Studying Interface Learning Manual: Interactive Simulation Interface | Moving the Slider Is Not the Same as Running an Investigation
7–10 minutes -
MindOS Learning Manual: Output-Interference State | The Answers You Recall First Can Make Later Answers Harder to Produce
8–12 minutes -
Student/Studying Interface Learning Manual: Zoom & Reflow Interface | Making Text Bigger Can Make the Page Harder to Operate
5–8 minutes -
MindOS Learning Manual: Part-List Cuing State | Seeing Some of the Answers Can Make the Rest Harder to Recall
9–13 minutes -
Student/Studying Interface Learning Manual: OCR Interface | A Scanned Page Can Look Readable and Still Be Invisible to the Study Tools
6–10 minutes -
Bolt Performance Calibration — Excellent Homework Does Not Automatically Prove Independent Mastery
8–12 minutes -
Bolt Performance Calibration — A Total Score Can Hide a Changing Skill Profile — and Subscores Can Be Too Noisy to Rescue It
8–11 minutes -
MindOS Learning Manual: Intertextual-Integration State | Reading Four Sources Is Not the Same as Building One Coherent Understanding
7–11 minutes -
Bolt Performance Calibration — A Teacher Can Rank Students Correctly and Still Misjudge Their Actual Level
7–11 minutes -
MindOS Learning Manual: Relevance-Filtering State | The Most Interesting Detail on the Page May Be the Least Useful Thing to Study
6–10 minutes -
Bolt Performance Calibration — A Report-Card Grade Is Not Automatically a Pure Achievement Score
8–12 minutes -
MindOS Learning Manual: Refutation State | Correcting a Misconception Is Not the Same as Telling the Right Answer
6–10 minutes -
MindOS Learning Manual: Prior-Knowledge Activation State | What You Already Know Can Help—or Mislead—the Next Thing You Learn
7–11 minutes -
MindOS Learning Manual: Memory-for-Change State | Noticing What Changed Can Stop the Old Version From Winning
14–20 minutes -
Bolt Performance Calibration — When the Score Becomes the Target, the Score Can Improve Faster Than the Learning
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.
