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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100 Primary English Tips Rebuilt as 10 Language Capabilities | Darwin × Voyage
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100 Primary Mathematics Tips Rebuilt as 10 Capabilities | Darwin × Voyage
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100 Primary Science Tips Rebuilt as 10 Scientific Capabilities | Darwin × Voyage
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7 Mathematics Strategies That Survive Unfamiliar Questions
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A Capability Profile Without Labelling the Child | Evidence, Support Conditions and the Next Learning Move
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A Workable Weekday Routine for P4 to P6: School, Rest, Screens, Study
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Accessible Learning Tasks Without Silent Target Changes | Change Access, Preserve the Learning Goal
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Accessible Learning Tasks Without Silent Target Changes | Preserve the Learning Goal While Changing Access
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Additional Mathematics Challenging Questions | An Advanced Worked Workshop
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Additional Mathematics Classroom | Chapter 10: Differentiation — Gradient Functions, Power/Product/Quotient/Chain Rules, Tangents, Normals and Rates | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 11: Further Applications of Differentiation — Increasing/Decreasing Functions, Stationary Points, First/Second Derivative Tests and Optimisation | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 12: Differentiation of Trigonometric, Exponential and Logarithmic Functions — Advanced Chain Rule, Tangents, Rates and Optimisation | SEC G3 K341
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Additional Mathematics Classroom | Chapter 13: Integration — Reverse Differentiation, Constants, Linear-Factor Integrals and G3 Trigonometric/Exponential/Logarithmic Extension | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 14: Applications of Integration — Definite Integrals, Signed Accumulation, Area Under Curves and Axis Crossings | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 15: Kinematics — Displacement, Velocity, Acceleration, Direction Changes, Total Distance and Motion Through Calculus | SEC G3 K341
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Additional Mathematics Classroom | Chapter 1: Simultaneous Equations, Polynomials and Partial Fractions | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 2: Quadratic Functions, Discriminants, Inequalities and Line–Curve Conditions | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 3: Binomial Theorem, General Terms and Coefficient Reasoning | SEC G3 K341
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Additional Mathematics Classroom | Chapter 4: Surds, Exact Algebra and Rationalising Denominators | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 5: Exponential and Logarithmic Functions, Laws, Equations, Graphs and Models | SEC G3 K341
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Additional Mathematics Classroom | Chapter 6: Coordinate Geometry in Two Dimensions — Lines, Midpoints, Rectilinear Areas and Circles | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 7: Linear Law, Straight-Line Transformations, Parameter Recovery and Model Testing | SEC G3 K341
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Additional Mathematics Classroom | Chapter 8: Trigonometric Functions, Graphs, Identities, Formulae and Equations | SEC G2 K232 / G3 K341
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Additional Mathematics Classroom | Chapter 9: Proofs in Plane Geometry — Parallel Lines, Congruence, Similarity, Midpoint and Tangent–Chord Reasoning | SEC G3 K341
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Additional Mathematics Classroom | Complete Chapter-by-Chapter SEC 2027 Route | G2 K232 / G3 K341
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Additional Mathematics Learning Hub | Secondary 3–4 A-Math Guides
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Additional Mathematics Strategies | Build the Algebra Route Before Speed
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Additional Mathematics Study Guide | SEC G2 & G3, Topics and Worked Examples
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Additional Mathematics Tuition Punggol | Secondary 3–4 A-Math | The Voyage Series
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Additional Mathematics Tuition Sengkang | S3–S4 Learning System
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Additional Mathematics Word Problems | Worked Examples from Situations to Equations and Calculus
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Algorithms & Computing Hub | From First Principles to Professional Systems
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Algorithms Learning Roadmap | Trace, Reconstruct, Design and Evaluate
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Algorithms Quartermaster | Methods, Tools and Representations Agent
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Alicia’s First Secondary 1 Report
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Anchor Green Primary School: A Parent’s Learning Guide
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Anomaly | When Learning Behaves Differently Than Expected
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Archivist | Index, Enumeration and Orphan-Control Agent
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Arrival State | What Has Actually Arrived at the Tutorial?
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Assembly and Configuration | Putting the Right Supports Around the Learner
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Baseline Before Intervention | Marie Curie Series | What Could the Learner Do Before We Changed Anything?
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Beatrice’s PSLE Week
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Becoming a Private Tutor in Singapore | Professional, Business, Tax, Privacy and Home-Tuition Responsibilities
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Before the First Tuition Lesson in Sengkang | What Parents Should Prepare
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Biochemistry, Metabolism & Molecular Homeostasis | Cofactors, Metals, Lipids and Flux
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Biology & Living Systems | Cells, Organisms, Structure and Function
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Bridgekeeper | Cross-Fort Handoff Agent
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Cape Canaveral Series | The Learning Place Where Preparation Becomes Independent Motion
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Career & Workplace Literacy Tutor | Curie Series | Understanding How Work Systems Change
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Career Change & Reinvention Tutor | Curie Series | Moving Capability Into a New Field
Browse every published Post
3746 results found
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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 -
Student/Studying Interface Learning Manual: Collaborative-Document Interface | A Shared File Does Not Automatically Create Shared Work
8–12 minutes -
Bolt Performance Calibration — The Same Piece of Work Can Look Better or Worse Depending on What the Teacher Saw Before It
7–11 minutes -
Student/Studying Interface Learning Manual: Writing-Suggestion Interface | A Green Tick Can Fix the Sentence and Hide the Decision
7–10 minutes -
Bolt Performance Calibration — Before You Call It a Weakness, Check Whether the Student Had a Fair Opportunity to Learn It
8–11 minutes -
Student/Studying Interface Learning Manual: Caption & Transcript Interface | Turning Sound Into Text Does Not Automatically Preserve the Lesson
7–10 minutes -
Bolt Measurement Note — Oral and Written Performance Are Not Automatically the Same Measurement
6–9 minutes -
Bolt Performance Calibration — The Lesson Can Change Because Someone Is Watching
6–10 minutes -
Student/Studying Interface Learning Manual: Speech-to-Text Interface | Speaking the Answer Is Not the Same as Submitting the Words
6–10 minutes -
Bolt Measurement Note — The Final Group Product Cannot Tell You Who Did What
4–6 minutes -
MindOS Learning Manual: Hypercorrection State | A High-Confidence Error Can Sometimes Be Easier to Correct
6–10 minutes -
Bolt Measurement Note — Multiple-Choice and Constructed-Response Scores Are Not Automatically Equivalent
5–8 minutes -
Student/Studying Interface Learning Manual: Text-to-Speech Interface | Hearing the Page Can Open Access Without Replacing the Page
7–11 minutes -
Bolt Measurement Note — Open-Book and Closed-Book Scores Do Not Mean the Same Thing by Default
6–9 minutes -
MindOS Learning Manual: Retrieval-Induced Forgetting State | Retrieving One Answer Can Make a Related Answer Harder to Access
6–10 minutes -
MindOS Learning Manual: Judgment-of-Learning State | Feeling Learned Is Not the Same as Predicting What You Will Remember
7–11 minutes -
Bolt Performance Calibration — This Year’s School Average May Change Because This Year’s Students Changed
6–10 minutes -
Bolt Measurement Note 28 — Paper and Screen Scores Are Not Automatically Interchangeable
6–8 minutes -
Bolt Performance Calibration — A Teacher Prediction Can Change the Performance It Later Appears to Predict
6–9 minutes -
Bolt Measurement Note 27 — You Cannot Judge an Intervention Before You Know What Was Actually Implemented
6–8 minutes -
MindOS Learning Manual: Paraphrase State | “In Your Own Words” Can Still Be Wrong
8–11 minutes -
Bolt Performance Calibration — A Low-Stakes Score Can Measure Effort as Well as Achievement
6–8 minutes -
Bolt Measurement Note 26 — A Coaching Conversation Is Not Yet Improved Teaching
6–9 minutes -
Bolt Performance Calibration — A Higher Score With an Accommodation Does Not Automatically Mean an Unfair Advantage
6–9 minutes -
MindOS Learning Manual: Learning-by-Teaching State | Preparing to Teach Can Change How You Learn
7–11 minutes -
Bolt Measurement Note 25 — A Class Score Gain Is Not Automatically the Teacher’s Effect
7–10 minutes -
MindOS Learning Manual: Gesture-to-Learn State | Sometimes the Hands Can Carry Part of the Idea
6–10 minutes -
Student/Studying Interface Learning Manual: Diagram & Figure Interface | A Picture Can Contain the Answer and Still Be Hard to Read
4–6 minutes -
MindOS Learning Manual: Production-Effect State | Reading It Aloud Can Make It More Memorable—But Not More Understood
7–10 minutes -
Student/Studying Interface Learning Manual: Formula & Reference-Sheet Interface | Having the Formula Is Not the Same as Knowing When It Applies
4–6 minutes -
Student/Studying Interface Learning Manual: Translation Tool Interface | A Translation Can Help You Re-enter the Lesson Without Replacing the Lesson
4–5 minutes -
Student/Studying Interface Learning Manual: Citation & Attribution Interface | Using a Source Is Not Finished Until the Reader Can Trace It
3–5 minutes -
Student/Studying Interface Learning Manual: Submission Preflight Interface | Finished Work Is Not Finished Until the Right Thing Actually Leaves
4–6 minutes -
Bolt Measurement Note 24 — Live and Video Observations Can Score the Same Teaching Differently
6–10 minutes -
Student/Studying Interface Learning Manual: Voice-Note Interface | A Good Explanation Can Disappear Inside a 12-Minute Recording
4–6 minutes -
Bolt Measurement Note 23 — Human-Like Agreement Does Not Make an AI Marker Valid
6–9 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.
