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 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
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Advanced Science Tutorials | Science Project Ideas: Safe Experiments, Fair Tests and Measurable Questions
106–159 minutes -
Advanced Science Tutorials | Science Project Ideas for Students: 80 Safe Investigations From Primary to Secondary
93–140 minutes -
Advanced Science Tutorials | Scientific Investigation Cycle: Questions, Methods, Data and Conclusions
106–158 minutes -
Advanced Additional Mathematics Tutorials | How Much A-Math Practice Is Enough? Questions, Hours, Past Papers and Diminishing Returns
5–8 minutes -
Advanced Additional Mathematics Tutorials | How to Solve Unfamiliar A-Math Questions Without Memorising Every Question Type
6–9 minutes -
Advanced Mathematics Tutorials | Primary 6 Mathematics: PSLE Problem Solving, Ratio, Speed, Algebra and Exam Control
19–29 minutes -
Advanced Additional Mathematics Tutorials | A-Math Weekly Study Schedule — Balance School, Homework, Old Topics and Exam Practice
6–10 minutes -
Advanced Additional Mathematics Tutorials | How to Score A1 in A-Math — What Distinction-Level Performance Actually Requires
6–10 minutes -
Advanced Science Tutorials | Chemistry Reasoning: Five Questions for Matter, Particles and Reactions
92–138 minutes -
Advanced English Tutorials | How to Improve English Exam Skills for PSLE and SEC
17–26 minutes -
Advanced English Tutorials | How to Improve English Editing and Error Correction Skills
18–27 minutes -
Advanced Science Tutorials | Scientific Method: Investigation Decisions, Variables and Evidence
100–150 minutes -
Advanced Mathematics Tutorials | Why Primary 5 Mathematics Marks Fall: Hidden Dependency Gaps Behind Fractions, Percentage and Ratio
11–16 minutes -
Advanced English Tutorials | How to Improve English Cloze Passage Skills
17–25 minutes -
Advanced English Tutorials | How to Improve English Pronunciation and Reading Aloud
17–26 minutes -
Advanced Mathematics Tutorials | The Primary 3 Multi-Step Reasoning Shift: How Students Learn to Plan Before Calculating
13–19 minutes -
Advanced Mathematics Tutorials | Primary 6 Mathematics: PSLE Problem Solving, Revision and Exam Control
9–14 minutes -
Advanced Science Tutorials | Chemistry Foundations: Matter, Particles, Mixtures and Chemical Change
86–128 minutes -
Advanced Mathematics Tutorials | Primary 5 Mathematics: Ratio, Percentage, Fractions, Decimals and Multi-Step Problems
8–12 minutes -
Advanced Additional Mathematics Tutorials | How Parents Can Help With A-Math Homework Without Doing the Mathematics for Their Child
6–9 minutes -
Advanced Additional Mathematics Tutorials | From A-Math to JC Mathematics — What Skills Carry Forward After Secondary School
6–8 minutes -
Advanced Additional Mathematics Tutorials | A-Math Algebra Mastery — Factorisation, Indices, Equations and Fractions That Unlock the Subject
5–8 minutes -
Advanced Additional Mathematics Tutorials | I Know the Formula but I Don’t Know How to Start the A-Math Question
7–10 minutes -
Advanced Mathematics Tutorials | Why Primary 2 Word Problems Go Wrong: From Keywords to Mathematical Relationships
14–22 minutes -
Advanced Mathematics Tutorials | Primary 3 Mathematics: Fractions, Models, Multiplication and Multi-Step Problem Solving
10–15 minutes -
Advanced Mathematics Tutorials | Primary 2 Mathematics: Multiplication, Division, Fractions and Word Problems
11–17 minutes -
Advanced English Tutorials | How to Improve English Listening Skills for PSLE and SEC
17–25 minutes -
Advanced Science Tutorials | Environmental Science for Students: Ecosystems, Pollution, Conservation and Climate
12–18 minutes -
Advanced English Tutorials | How to Improve English Speaking and Oral Communication
17–25 minutes -
Advanced Science Tutorials | Earth Science for Beginners: Weather, Water Cycle, Rocks, Climate and Earth Systems
11–17 minutes -
Advanced Additional Mathematics Tutorials | How to Catch Up in A-Math Without Restarting the Whole Mathematics Syllabus
7–10 minutes -
Advanced Additional Mathematics Tutorials | What a 3-Student A-Math Tutorial Should Actually Do
7–11 minutes -
Advanced Additional Mathematics Tutorials | Can You Self-Study A-Math? When Independent Study Works and When Help Matters
8–11 minutes -
Advanced Additional Mathematics Tutorials | E-Math vs A-Math — What Actually Changes When Students Move Into Additional Mathematics
7–10 minutes -
Advanced English Tutorials | How to Build English Vocabulary for School and Exams
17–25 minutes -
Advanced Science Tutorials | Physics for Beginners: Forces, Energy, Heat, Light and Electricity
11–16 minutes -
Advanced English Tutorials | How to Improve English Grammar and Sentence Structure
17–25 minutes -
Advanced Science Tutorials | Biology for Beginners: Cells, Living Systems, Human Body and Ecosystems
13–19 minutes -
Advanced Science Tutorials | Science Experiments at Home: Safe Fair Tests, Variables, Evidence and Conclusions
10–14 minutes -
Advanced Science Tutorials | How to Read Science Diagrams, Graphs and Tables Without Guessing
10–15 minutes -
Advanced Science Tutorials | Science Vocabulary: How to Learn Scientific Terms and Use Them Correctly
10–15 minutes -
Advanced Science Tutorials | How to Improve Science Grades Without Doing More Worksheets
12–18 minutes -
Advanced Additional Mathematics Tutorials | A-Math Exam Technique — Time Management, Method Marks and Final Checks
8–11 minutes -
Advanced Additional Mathematics Tutorials | How to Improve A-Math Quickly — A 30-Day Recovery Plan
7–11 minutes -
Advanced Additional Mathematics Tutorials | A-Math Past Papers — How to Use Them Without Rehearsing the Same Mistakes
8–12 minutes -
Advanced Additional Mathematics Tutorials | How to Revise A-Math Effectively — From Weak Topic to Mixed-Paper Control
8–12 minutes -
PSLE Science Reality Lab Vol No.581 | “Solar Wind Speed = 600 km/s” — Is Air Blowing Through Earth’s Atmosphere at 600 km/s?
8–12 minutes -
Advanced Additional Mathematics Tutorials | A-Math Notes and Formula Revision — Build a Study System That Works Under Exam Pressure
10–15 minutes -
Advanced Additional Mathematics Tutorials | Common A-Math Mistakes — Why Correct Ideas Still Lose Marks
10–16 minutes -
Advanced Science Tutorials | From PSLE to Secondary Science G1, G2 and G3: A Parent Guide
11–16 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.
