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 3 Mathematics Learning Guide | Area, Perimeter, Rectangles, Squares & Rectilinear Figures
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Primary 3 Mathematics Learning Guide | Assessment Pacing, Error Recovery, Checking & Test Strategy
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Primary 3 Mathematics Learning Guide | Bar Graphs, Scales, Data Comparison & Interpretation
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Primary 3 Mathematics Learning Guide | Bar Models, Diagrams, Tables & Mathematical Representation
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Primary 3 Mathematics Learning Guide | Building & Completing Bar Graphs, Scale Choice & Data Representation
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Primary 3 Mathematics Learning Guide | Classification, Sorting, Properties & Mathematical Categories
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Primary 3 Mathematics Learning Guide | Comparing & Ordering Unlike Fractions, Benchmarks, Same Numerator & Number Lines
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Primary 3 Mathematics Learning Guide | Concrete–Pictorial–Abstract Learning, Manipulatives, Diagrams & Symbols
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Primary 3 Mathematics Learning Guide | Curriculum Progression, Prerequisite Dependencies & Learning Sequence
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Primary 3 Mathematics Learning Guide | Diagnostic Benchmark, Worked Answers & First Weak Link Routing
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Primary 3 Mathematics Learning Guide | Drawing Parallel & Perpendicular Lines, Square Grids, Horizontal/Vertical Lines & Right-Angle Verification
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Primary 3 Mathematics Learning Guide | Equality, Number Sentences, Missing Values & Balance
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Primary 3 Mathematics Learning Guide | Equivalent Fractions, Simplest Form, Numerator/Denominator Scaling & Same-Value Models
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Primary 3 Mathematics Learning Guide | Estimation, Mental Mathematics, Checking & Answer Verification
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Primary 3 Mathematics Learning Guide | Examples, Non-Examples, Misconceptions, Contrast & Concept Repair
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Primary 3 Mathematics Learning Guide | Formative Assessment, Exit Tickets, Diagnostics & Feedback
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Primary 3 Mathematics Learning Guide | Fraction Sense, Equivalence, Comparison & Related Fraction Operations
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Primary 3 Mathematics Learning Guide | Fractions of a Set, Equal Groups, Collections, Unit Fractions & Part-of-a-Group Reasoning
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Primary 3 Mathematics Learning Guide | Fractions, Equivalent Fractions, Simplest Form & Money
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Primary 3 Mathematics Learning Guide | Heuristics II: Act It Out, Draw a Diagram, Simplify & Look for a Pattern
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Primary 3 Mathematics Learning Guide | Home Learning, Homework Independence, Parent Support & Sustainable Study Routines
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Primary 3 Mathematics Learning Guide | Justification, Reasoning, Proof Habits & Explaining Why
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Primary 3 Mathematics Learning Guide | Length, Mass, Liquid Volume, Unit Conversion & Compound Measures
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Primary 3 Mathematics Learning Guide | Lesson Sequencing, Worked Examples, Guided Practice & Independent Transfer
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Primary 3 Mathematics Learning Guide | Mastery Criteria, Progress Evidence, Fluency, Transfer & Independence
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Primary 3 Mathematics Learning Guide | Mastery Diagnostic Map, Fluency, Processes & Metacognition
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Primary 3 Mathematics Learning Guide | Mathematical Communication, Working, Notation & Explanation
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Primary 3 Mathematics Learning Guide | Mathematical Discussion, Questioning, Peer Explanation & Classroom Dialogue
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Primary 3 Mathematics Learning Guide | Mathematical Language, Comparison, Relationships & Inverse Thinking
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Primary 3 Mathematics Learning Guide | Mathematical Modelling, Assumptions, Estimation & Real-World Decisions
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Primary 3 Mathematics Learning Guide | Mathematical Reading, Question Parsing, Vocabulary & Problem Interpretation
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Primary 3 Mathematics Learning Guide | Measurement Estimation, Choosing Metric Units, Reading Scales & Reasonableness
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Primary 3 Mathematics Learning Guide | Measurement, Time, Area, Perimeter, Angles & Geometry
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Primary 3 Mathematics Learning Guide | Mental Computation, Flexible Number Strategies & Efficient Calculation
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Primary 3 Mathematics Learning Guide | Mixed Problems, Strategy Choice, Transfer & Non-Routine Reasoning
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Primary 3 Mathematics Learning Guide | Money, Decimal Notation, Total Cost, Difference & Change
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Primary 3 Mathematics Learning Guide | Multiplication & Division Algorithms, Place Value, Regrouping, Quotients & Checking
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Primary 3 Mathematics Learning Guide | Multiplication Properties, Distributive Thinking, Arrays, Decomposition & Mental Strategies
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Primary 3 Mathematics Learning Guide | Multiplication Tables 6–9, Derived Facts, Patterns, Doubling & Commutative Reasoning
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Primary 3 Mathematics Learning Guide | Multiplication Tables, Division, Fact Families & Remainders
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Primary 3 Mathematics Learning Guide | Multiplicative Comparison, Times as Many & Comparison Bar Models
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Primary 3 Mathematics Learning Guide | Number Lines, Benchmarks, Intervals & Magnitude Reasoning
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Primary 3 Mathematics Learning Guide | Number Patterns, Sequences, Missing Numbers & Structural Reasoning
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Primary 3 Mathematics Learning Guide | Open-Ended Tasks, Multiple Methods, Generalisation & Enrichment
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Primary 3 Mathematics Learning Guide | Parent–Teacher Remediation, Intervention & Mastery Pathways
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Primary 3 Mathematics Learning Guide | Place Value Transformations, Number Representations, 1/10/100/1000 More or Less & Expanded Form
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Primary 3 Mathematics Learning Guide | Place Value, Regrouping, Addition & Subtraction Algorithms
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Primary 3 Mathematics Learning Guide | Primary 3 to Primary 4 Readiness, Transition & Handover
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Primary 3 Mathematics Learning Guide | Problem Posing, Question Generation, Conditions & Mathematical Creativity
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Primary 3 Mathematics Learning Guide | Problem-Solving Heuristics, Work Backwards, Guess & Check, Make a Table
Browse every published Post
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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.
