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
-
Primary 6 Mathematics Learning Guide | Money Applications: Discount, GST and Interest
-
Primary 6 Mathematics Learning Guide | Multi-Step Word Problems and Model Selection
-
Primary 6 Mathematics Learning Guide | Multiple Methods, Verification and Comparing Solution Routes
-
Primary 6 Mathematics Learning Guide | Number Sense, Approximation, Estimation and Reasonableness
-
Primary 6 Mathematics Learning Guide | Patterns, Rules, Generalisation and Invariant Thinking
-
Primary 6 Mathematics Learning Guide | Primary 6 to Secondary 1 Mathematics Handover
-
Primary 6 Mathematics Learning Guide | PSLE Error Analysis, Pacing and Exam Control
-
Primary 6 Mathematics Learning Guide | Question Decomposition and Subgoals
-
Primary 6 Mathematics Learning Guide | Rate, Unit Rate and Quantity per Unit
-
Primary 6 Mathematics Learning Guide | Ratio, Percentage and Multiplicative Change
-
Primary 6 Mathematics Learning Guide | Remainder Branching and Fractions of a Changing Whole
-
Primary 6 Mathematics Learning Guide | Repeated Identity, Chained Ratios and Shared Middle Quantities
-
Primary 6 Mathematics Learning Guide | Reversibility and Inverse Thinking
-
Primary 6 Mathematics Learning Guide | Selecting Relevant Information and Filtering Distractors
-
Primary 6 Mathematics Learning Guide | Simplifying Problems and Equivalent Structure
-
Primary 6 Mathematics Learning Guide | Stack Model, Split Model and Two-Dimensional Visual Reasoning
-
Primary 6 Mathematics Learning Guide | Synthesis Problems and End-to-End Solution Architecture
-
Primary 6 Mathematics Learning Guide | Systematic Listing and Case Organisation
-
Primary 6 Mathematics Learning Guide | Three-Quantity Comparison Models and Multi-Bar Alignment
-
Primary 6 Mathematics Learning Guide | Transfer to Novel and Unfamiliar Problems
-
Primary 6 Mathematics Learning Guide | Unit Overlay Strategy: Superimposing Equivalent Units and Shared Sections
-
Primary 6 Mathematics Learning Guide | Working Backwards and Before–After Reasoning
-
Primary 6 Mathematics Learning Hub | PSLE Mathematics Guides
-
Primary 6 Mathematics Sengkang | PSLE Exam-Control Checklist
-
Primary 6 Mathematics Sengkang | The Voyage of Water
-
Primary 6 Mathematics Tuition Sengkang | 2026 PSLE Math & Exam Control
-
Primary 6 Mathematics Tutor | Curie Series | Integration, PSLE and the Handover to Algebra
-
Primary 6 PSLE Revision Timetable Template (downloadable)
-
Primary 6 Science Learning Guide | Adaptation, Unfavourable Environments, Movement & Survival for PSLE
-
Primary 6 Science Learning Guide | Alternative Explanations, Contradictions & Anomaly Resolution for PSLE
-
Primary 6 Science Learning Guide | Analogy, Similarity & Transfer Boundaries for PSLE
-
Primary 6 Science Learning Guide | Boundary Cases, Exceptions & Edge Conditions for PSLE
-
Primary 6 Science Learning Guide | Cause, Mechanism, Explanation Chains & Evidence for PSLE
-
Primary 6 Science Learning Guide | Claims, Evidence, Reasoning & Counterclaims for PSLE
-
Primary 6 Science Learning Guide | Concepts, Systems, Interactions & Energy
-
Primary 6 Science Learning Guide | Confidence, Uncertainty, Anomalies & Strength of Evidence for PSLE
-
Primary 6 Science Learning Guide | Confounding Variables, Controls & Experimental Validity for PSLE
-
Primary 6 Science Learning Guide | Constructing Tables, Graphs & Data Displays for PSLE
-
Primary 6 Science Learning Guide | Data, Graphs, Diagrams & Evidence
-
Primary 6 Science Learning Guide | Digestive System: Digestion vs Absorption, Food Path, Small Intestine, Large Intestine & Common PSLE Concept Traps
-
Primary 6 Science Learning Guide | Diversity, Classification, Life Cycles & Reproduction for PSLE
-
Primary 6 Science Learning Guide | Electrical Circuits: Current, Series vs Parallel, Switches, Brightness & Common PSLE Concept Traps
-
Primary 6 Science Learning Guide | Electrical Systems, Circuits & Energy for PSLE
-
Primary 6 Science Learning Guide | Energy Conversion: Trace Energy Through a System
-
Primary 6 Science Learning Guide | Energy in Food: The Sun, Plants, Animals, Respiration & Energy Pathways for PSLE
-
Primary 6 Science Learning Guide | Evidence Synthesis Across Text, Tables, Graphs & Diagrams for PSLE
-
Primary 6 Science Learning Guide | Exam Timing, Question Triage, Recovery & Final Checking for PSLE
-
Primary 6 Science Learning Guide | Food Chains & Food Webs: Arrow Direction, Producers, Consumers, Decomposers, Population Changes & Common PSLE Concept Traps
-
Primary 6 Science Learning Guide | Forces: Friction, Gravity and Elastic Spring Force
-
Primary 6 Science Learning Guide | Heat vs Temperature, Thermal Energy Transfer, State Changes & Common PSLE Concept Traps
Browse every published Post
-
Secondary English Examination Performance: Diagnose Before Drilling
42–63 minutes -
Advanced Mathematics Tutorials | Quiet Students in Mathematics Tuition — When “No Questions” Does Not Mean “No Problems”
43–64 minutes -
SEC English: What G1, G2 and G3 Students Need to Be Able to Do
43–64 minutes -
Advanced Mathematics Tutorials | Mathematics Tuition Class Too Easy or Too Hard — How Parents Should Read Difficulty Fit
42–64 minutes -
Secondary 4 English: Examination-Year Control and Transfer
42–63 minutes -
Advanced Mathematics Tutorials | Mathematics Marks Improved, Then Fell Again — Diagnose Regression Without Starting Over
42–63 minutes -
Secondary 3 English: Building SEC-Ready Reading and Writing
42–62 minutes -
Advanced Mathematics Tutorials | My Child Does Not Practise Mathematics Between Tuition Lessons — What Should Change?
42–64 minutes -
Secondary 1–2 Writing: Ideas, Organisation, Voice and Accuracy
42–63 minutes -
Advanced Mathematics Tutorials | When School and Tuition Teach Mathematics Differently — How to Handle Conflicting Methods
43–64 minutes -
Secondary 1–2 Comprehension: Evidence and Inference
42–62 minutes -
Advanced Mathematics Tutorials | What to Look For in a Secondary Mathematics Trial Lesson Before You Commit
42–64 minutes -
Advanced Mathematics Tutorials | When Mathematics Tuition Creates Dependence — How to Fade Support Without Losing Marks
42–63 minutes -
Advanced Mathematics Tutorials | Mathematics Tuition Progress Review — What Parents Should Actually Be Told
42–64 minutes -
Advanced Mathematics Tutorials | Three-Student Mathematics Tuition — How to Group Students by Readiness, Pace and Learning Job
42–64 minutes -
Advanced Mathematics Tutorials | Switching Mathematics Tutors Mid-Year — How to Change Support Without Losing the Learning History
43–64 minutes -
Secondary 2 English: Reading, Writing and Language Development
42–63 minutes -
Secondary 1 English: Transition From Primary Answers to Secondary Reasoning
42–63 minutes -
Primary 1–3 Oral, Reading Fluency and Sound-to-Text Control
42–63 minutes -
Primary 1–3 Writing and Sentence Construction
42–63 minutes -
Primary 1–3 Reading Comprehension Foundations
42–63 minutes -
Primary 1–3 Vocabulary and Spelling
42–63 minutes -
Primary 1–3 Grammar Foundations
42–63 minutes -
Primary 1–3 English Syllabus and Progression
42–63 minutes -
Advanced Mathematics Tutorials | Secondary 1 vs Secondary 2 vs Secondary 3 vs Secondary 4 Mathematics Tuition — The Teaching Job Should Change
41–61 minutes -
How to Prepare for a Closed-Book University Examination | Retrieval, Problem Practice and Transfer
42–63 minutes -
Advanced Mathematics Tutorials | Should Secondary Mathematics Tuition Follow School Homework or Use Its Own Materials?
42–63 minutes -
How to Read Academic Papers as a Student | Question, Structure, Evidence and Notes
42–63 minutes -
Advanced Mathematics Tutorials | School Mathematics Pace Too Fast? How to Catch Up Without Falling Further Behind
42–63 minutes -
How to Learn From Lectures and Tutorials | Before, During and After Class
42–63 minutes -
Advanced Mathematics Tutorials | Secondary Mathematics Tuition vs Enrichment — Does the Student Need Repair, Exam Control or Stretch?
43–64 minutes -
Polytechnic Study: Projects, Internships and Independent Learning
43–64 minutes -
Advanced Mathematics Tutorials | Secondary Mathematics Mastery Checkpoint — When Is a Topic Really Ready to Move On?
5–7 minutes -
Advanced Mathematics Tutorials | Secondary Mathematics Feedback Timing — Immediate Help vs Delayed Independence
5–8 minutes -
Advanced Mathematics Tutorials | Secondary Mathematics With AI Solution Apps — Check the Mathematics Without Outsourcing the Thinking
5–7 minutes -
Advanced Mathematics Tutorials | Why Secondary Mathematics Homework Takes So Long — Diagnose the Minutes Before Telling Students to Work Faster
5–8 minutes -
University Teamwork, Presentations and Peer Assessment
43–65 minutes -
A Personal Knowledge Base for School
43–64 minutes -
Study Prompts That Preserve the Learner’s Thinking
43–64 minutes -
A Personal Knowledge Base for School
43–65 minutes -
Examination Countdown and Preparation Planner
43–65 minutes -
Study Prompts That Preserve the Learner’s Thinking
42–63 minutes -
Advanced Mathematics Tutorials | Secondary Mathematics Varied Practice — Change the Surface Without Losing the Structure
4–6 minutes -
Advanced Mathematics Tutorials | Secondary Mathematics Open-Book vs Closed-Book Practice — When Notes Help and When They Hide Weakness
4–6 minutes -
Advanced Mathematics Tutorials | Secondary Mathematics Deliberate Practice — Repair One Bottleneck Instead of Doing More of Everything
4–6 minutes -
Advanced Mathematics Tutorials | Secondary Mathematics Retrieval Practice — Recall Before You Reopen the Notes
5–7 minutes -
Advanced Mathematics Tutorials | Secondary Mathematics Confidence Calibration — Know What You Know Before the Test Knows for You
3–4 minutes -
Advanced Mathematics Tutorials | Secondary Mathematics Structural Transfer — Use What You Know in a New Question Without Memorising Every Type
3–5 minutes -
Advanced Mathematics Tutorials | Secondary Mathematics Error Prediction — Learn to See the Mistake Before It Happens
3–4 minutes -
Advanced Mathematics Tutorials | Secondary Mathematics Reverse Engineering — Learn to Work Backwards From Answers, Conditions and Solutions
3–4 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.
