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 1 Mathematics Learning Guide | Equal Groups, Sharing, Grouping and Early Multiplicative Thinking
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Primary 1 Mathematics Learning Guide | Equality, Number Bonds, Missing Numbers and Inverse Relationships
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Primary 1 Mathematics Learning Guide | Equation Balance Laboratory: True/False, Missing Signs, Unknowns and Same-Value Reasoning
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Primary 1 Mathematics Learning Guide | Estimation, Reasonableness, Benchmarks and Answer Checking
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Primary 1 Mathematics Learning Guide | Hundred Chart Laboratory: Navigation, Ten More/Ten Less, Missing Numbers and Patterns
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Primary 1 Mathematics Learning Guide | Independent Practice, Self-Correction, Reflection and Learning Habits
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Primary 1 Mathematics Learning Guide | Learning Progression, Term-by-Term Review and Year-End Consolidation
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Primary 1 Mathematics Learning Guide | Length, Centimetres, Measuring, Comparing and Scale Reading
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Primary 1 Mathematics Learning Guide | Mastery Review, Retrieval, Transfer and Primary 2 Handover
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Primary 1 Mathematics Learning Guide | Mathematical Communication, Working, Explanation and Justification
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Primary 1 Mathematics Learning Guide | Mathematical Language, More, Fewer, Difference and Comparison
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Primary 1 Mathematics Learning Guide | Mathematical Modelling, Real Situations, Assumptions and Returning to Context
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Primary 1 Mathematics Learning Guide | Mathematical Statements, True or False, Counterexamples and Error Detection
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Primary 1 Mathematics Learning Guide | Mathematical Vocabulary, Symbols, Signs and Reading Equations
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Primary 1 Mathematics Learning Guide | Mental Calculation Strategy Laboratory: Make Ten, Doubles, Near Doubles, Counting On and Fact Families
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Primary 1 Mathematics Learning Guide | Mental Mathematics, Make Ten, Doubles, Counting On and Flexible Strategies
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Primary 1 Mathematics Learning Guide | Missing Information, Extra Information and Problem Completeness
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Primary 1 Mathematics Learning Guide | Mixed Practice, Error Analysis, Checking and Independent Problem Solving
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Primary 1 Mathematics Learning Guide | Money Sense, Coin Values, Totals, Differences and Simple Transactions
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Primary 1 Mathematics Learning Guide | Money, Length, Time, Shapes and Picture Graphs
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Primary 1 Mathematics Learning Guide | Non-Routine Problems, Heuristics, Trial, Pattern and Strategy Choice
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Primary 1 Mathematics Learning Guide | Number Line Laboratory: Counting Forward & Backward, Missing Numbers, Distance and Operation Jumps
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Primary 1 Mathematics Learning Guide | Number Lines, Distance, Difference, Before, After and Position
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Primary 1 Mathematics Learning Guide | Number Names & Numeral Translation Laboratory: Hear, Read, Write, Tens-and-Ones and Number Words
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Primary 1 Mathematics Learning Guide | Number Patterns, Sequences, Rules and Pattern Recognition
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Primary 1 Mathematics Learning Guide | Number Sense, Counting and Place Value
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Primary 1 Mathematics Learning Guide | Objects, Ten Frames, Number Lines, Models and Mathematical Representation
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Primary 1 Mathematics Learning Guide | Ordinal Numbers, Ranking, Position and First-to-Tenth Reasoning
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Primary 1 Mathematics Learning Guide | Ordinal Position & Queue Laboratory: First-to-Tenth, Left/Right, Before/After and Rank Changes
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Primary 1 Mathematics Learning Guide | Pattern Machine Laboratory: Skip Counting, Number Sequences, Missing Terms, Growing Patterns and Rule Detection
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Primary 1 Mathematics Learning Guide | Picture Graphs, Categories, Totals, Differences and Data Interpretation
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Primary 1 Mathematics Learning Guide | Place Value Flexibility, Bundling Tens, Regrouping and Two-Digit Calculation
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Primary 1 Mathematics Learning Guide | Primary 1 Mathematics Capstone: Integrated Reasoning, Diagnostics and Complete Learning Map
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Primary 1 Mathematics Learning Guide | Primary 1 to Primary 2 Mathematics Readiness, Diagnostics and Transition
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Primary 1 Mathematics Learning Guide | Shape Composition Laboratory: Rotation, Decomposition, Grid Copying and Spatial Reasoning
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Primary 1 Mathematics Learning Guide | Sorting, Classifying, Attributes, Rules and Mathematical Categories
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Primary 1 Mathematics Learning Guide | Strategy Transfer Across Number, Money, Time, Length and Data
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Primary 1 Mathematics Learning Guide | Time, Clocks, Five-Minute Intervals, am/pm and Duration
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Primary 1 Mathematics Learning Guide | Visual Models, Bar Models, Part–Whole Diagrams and Representation Choice
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Primary 1 Mathematics Learning Guide | Word Problem Representation Laboratory: Pictures, Number Bonds, Bar Models, Number Lines and Equations
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Primary 1 Mathematics Learning Guide | Word Problems, Mathematical Language, Representation and Reasoning
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Primary 1 Mathematics Learning Guide | Zero, Empty Sets, Identity and Boundary Thinking
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Primary 1 Mathematics Learning Hub | Number Sense, Operations, Measurement and Problem Solving
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Primary 1 Mathematics Sengkang | The Voyage of Water
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Primary 1 Mathematics Tuition Sengkang | Number Sense & Problem Solving Foundations
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Primary 1 Mathematics Tutor | Curie Series | Making Number Sense and Representation Visible
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Primary 1 Science Tutor | Curie Series | Building Observation, Comparison and Explanation Before Formal Science
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Primary 1 to Primary 6 Mathematics | Why the Method Must Evolve
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Primary 1 Tuition Sengkang | Building the First Learning System
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Primary 1–3 English Assessment and Feedback Foundations | Diagnosis, Evidence, Error Patterns, Feedback and Independent Improvement
Browse every published Post
3746 results found
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Student/Studying Interface Learning Manual: Offline Study Pack Interface | No Internet Should Not Mean No Study Route
4–6 minutes -
Student/Studying Interface Learning Manual: Dictionary & Glossary Interface | Looking Up a Word Is Not the Same as Rejoining the Sentence
4–6 minutes -
Bolt Measurement Note 22 — The Students Who Raise Their Hands Are Not the Whole Class
6–8 minutes -
Student/Studying Interface Learning Manual: Photo-Capture Interface | A Photograph Can Save the Page and Lose the Study State
3–5 minutes -
Bolt Measurement Note 21 — A Test Question Can Behave Differently for Comparable Groups
6–9 minutes -
Student/Studying Interface Learning Manual: PDF Study Interface | A 90-Page PDF Is Not a 90-Page Study Plan
4–6 minutes -
Student/Studying Interface Learning Manual: Cross-Device Study Interface | Moving From Laptop to Paper to Phone Should Not Erase the Study State
5–7 minutes -
Student/Studying Interface Learning Manual: Study-Switch Interface | Changing Subject Is a Handoff, Not Just a New Tab
4–6 minutes -
Student/Studying Interface Learning Manual: Source-Trail Interface | If You Cannot Find Where a Fact Came From, You Cannot Reopen the Route
4–6 minutes -
Student/Studying Interface Learning Manual: Calculator Interface | A Correct Display Is Not Yet a Usable Study Record
4–6 minutes -
MindOS Learning Manual: Counterexample-Generation State | Can You Find the Case That Breaks the Rule?
5–7 minutes -
MindOS Learning Manual: Problem-Decomposition State | A Hard Problem May Be Several Smaller Problems Hiding Together
6–9 minutes -
Student/Studying Interface Learning Manual: Annotation Interface | Highlighting Can Leave a Beautiful Page and No Restart Point
4–6 minutes -
MindOS Learning Manual: Deliberate-Error State | Can Making a Wrong Answer on Purpose Help You Learn?
5–7 minutes -
MindOS Learning Manual: Learner-Generated Outlining State | Can You See the Hierarchy Inside the Text?
5–7 minutes -
MindOS Learning Manual: Solution-Verification State | Can You Check an Answer Without Repeating the Same Mistake?
5–7 minutes -
MindOS Learning Manual: Rule-Induction State | Can You Discover the Rule Without Being Told the Rule?
5–8 minutes -
MindOS Learning Manual: Subgoal-Decomposition State | Can You Break a Complex Problem Into Useful Parts?
5–7 minutes -
MindOS Learning Manual: Concept-Mapping State | A Diagram Helps Only If the Relationships Are Doing the Work
5–7 minutes -
Bolt Measurement Note 20 — Question Order Can Change the Performance You Measure
5–8 minutes -
Bolt Measurement Note 19 — The Marker Can Drift Even When the Rubric Does Not
5–7 minutes -
Bolt Measurement Note 18 — Crossing a Grade Boundary Does Not Create a Sudden Jump in Capability
6–8 minutes -
Bolt Measurement Note 17 — One Classroom Observation Is Not the Teacher
6–9 minutes -
Student/Studying Interface Learning Manual: AI Study-Thread Interface | A Helpful Chat Can Still Lose the Study Job
6–9 minutes -
Student/Studying Interface Learning Manual: Deadline-to-Session Interface | A Due Date Is Not a Study Plan
4–6 minutes -
Bolt Measurement Note 16 — Student Feedback About Teaching Is Evidence, Not a Verdict
6–9 minutes -
Student/Studying Interface Learning Manual: Practice-Set Interface | A Worksheet Does Not Tell You Which Questions Belong in This Session
4–7 minutes -
Student/Studying Interface Learning Manual: Worked-Example Study Interface | Seeing Every Step Still Leaves One Question: What Do You Do When the Example Closes?
6–10 minutes -
Bolt Measurement Note 15 — A Blank Response Is Missing Evidence, Not Automatically Zero Capability
6–9 minutes -
MindOS Learning Manual: Analogical-Mapping State | Two Problems Can Look Different and Still Have the Same Skeleton
6–9 minutes -
Bolt Measurement Note 14 — A Higher Retest Score May Be Part Learning, Part Test Familiarity
6–9 minutes -
Student/Studying Interface Learning Manual: Study Queue Interface | A To-Do List Is Not Yet a Study Order
7–10 minutes -
MindOS Learning Manual: Concept-Boundary State | Knowing the Definition Is Not the Same as Knowing What Belongs
6–9 minutes -
Bolt Measurement Note 13 — A Test With Too Few Questions Can Misrepresent a Skill
6–9 minutes -
MindOS Learning Manual: Example-Generation State | Can You Invent a New Example That Really Fits?
6–9 minutes -
MindOS Learning Manual: Summarisation State | A Shorter Page Can Still Lose the Idea
7–10 minutes -
MindOS Learning Manual: Desirable-Difficulty State | Harder Learning Helps Only When the Difficulty Is Doing Useful Work
6–8 minutes -
MindOS Learning Manual: Mnemonic Encoding State | A Memory Trick Must Still Lead Back to the Meaning
5–7 minutes -
MindOS Learning Manual: Overlearning State | One Correct Answer Is Not Always Enough—but More Is Not Always Better
5–8 minutes -
MindOS Learning Manual: Chunking State | When Five Steps Become One Thing
6–9 minutes -
MindOS Learning Manual: Imagination-to-Learn State | Can You Rehearse the Model Without Looking at It?
5–8 minutes -
MindOS Learning Manual: Drawing-to-Learn State | A Picture Helps Only If You Build the Meaning Into It
5–7 minutes -
MindOS Learning Manual: Concreteness Fading State | The Blocks Are Supposed to Disappear
5–7 minutes -
MindOS Learning Manual: Practice Variability State | Repeating the Same Problem Can Hide the Rule
4–7 minutes -
MindOS Learning Manual: Pretesting State | Failing Before Learning Can Help You Learn
7–11 minutes -
MindOS Learning Manual: Completion Problem State | Can You Finish the Route Before You Build the Whole Route?
4–5 minutes -
MindOS Learning Manual: Question Generation State | Can You Turn What You Studied Into a Good Question?
4–5 minutes -
MindOS Learning Manual: Goal-Free Problem State | When the Goal Itself Overloads the Novice
4–5 minutes -
MindOS Learning Manual: Erroneous Example State | Can You Find Why the Wrong Solution Is Wrong?
4–6 minutes -
MindOS Learning Manual: Successive Relearning State | Remembering It Once Is Not the Same as Keeping It
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.
