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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The Complete Sengkang Guide (2026): Food, Things to Do, Schools, Transport, Housing and What’s Next
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The Contrast Test | Marie Curie Series | Can the Learner Tell Similar Ideas Apart?
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The Darwin Series | Why Learning Has to Evolve
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The Discriminating Test | Marie Curie Series | Which Small Test Separates Competing Explanations?
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The Evidence Loop | Marie Curie Series | How We Know Learning Changed
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The Examination-Ready Learner: What Still Goes Wrong on the Day
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The Forward–Reverse Test | Marie Curie Series | Can the Learner Reason Both Ways Without Assuming Both Directions Are Equivalent?
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The Fragile Learner: Right Today, Wrong Tomorrow
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The Generalisation Test | Marie Curie Series | Can the Learner Extend an Idea Without Overextending It?
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The Goal of Tuition | Building a Learner Who Needs Less Help Over Time
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The Independent Start | Marie Curie Series | What Happens Before the First Prompt
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The Last Two Weeks Before PSLE: A Day-by-Day Plan
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The Last Two Weeks Before SEC: A Day-by-Day Plan
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The Launch Window | Readiness Depends on Capability and Conditions
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The Marie Curie Series | Making Invisible Learning Visible
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The Measurement Effect | Marie Curie Series | When Testing Changes What We Are Trying to See
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The Mistake Log That Actually Reduces Repeats
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The Pressure Test | Marie Curie Series | What Changes When Time, Stakes and Interference Rise
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The Reference Condition | Marie Curie Series | What Are We Comparing This Learning Result Against?
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The Repeatability Test | Marie Curie Series | Does the Capability Reappear Under Equivalent Conditions?
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The Resolution Limit | Marie Curie Series | How Fine a Learning Difference Can Our Evidence Actually See?
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The Robustness Test | Marie Curie Series | Does the Capability Survive Harmless Variation?
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The Sampling Window | Marie Curie Series | Have We Seen Enough of the Capability to Generalise?
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The School Says ‘Good Effort’ but the Marks Say Otherwise
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The Spaceport | Why the Learning Environment Is Part of the System
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The Stable Learner: Reliable on the Familiar, Stuck on the New
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The Stopping Rule | Marie Curie Series | When Do We Know Enough to Act Without Testing Forever?
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The Transfer Test | Marie Curie Series | What Happens When the Question Changes Shape
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The Transfer-Ready Learner: When to Change the Conditions
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The Tutor Handbook
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The Tutor System | How Parents, Students and Tutors Work Together
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The Voyage of Water | English, Mathematics & Science from Primary 1 to Secondary 4
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The Voyage Series | English, Mathematics and Science Connections
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Time Budget for PSLE English: Paper by Paper, Minute by Minute
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Time Budget for PSLE Maths: Paper 1 and Paper 2
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Time Budget for PSLE Science: Booklet A and Booklet B
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Time Budget for SEC English: G1, G2 and G3 Papers
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Tower Clear | The Moment Control Begins to Transfer
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Tuition Enquiry Process in Sengkang | What Happens Next After You Contact eduKate
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Tuition in Sengkang: What Is Near Compass One, Sengkang MRT and Buangkok, and How to Compare It
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Tutor | The Marie Curie Series | The Student Learning Dashboard
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Tutorial | The Marie Curie Series | The Learning Room Where Evidence Appears
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Umbilicals | The Supports That Must Eventually Disconnect
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University English Tutor | Curie Series | Academic Reading, Writing and Disciplinary Independence
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University Mathematics Tutor | Curie Series | Proof, Modelling and Disciplinary Independence
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University Science Tutor | Curie Series | Evidence, Literature, Method and Scientific Self-Correction
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University, Research & Professional Science | From Literature to Scientific Judgement
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Veterinary Science | Animal Health, Evidence, Welfare and One Health
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Voyage Series
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Watchtower Agent | Estate Drift and Change Observer
Browse every published Post
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PSLE Science Reality Lab Vol No.006 | “It Happened on Camera” — Does a Demonstration Test Why It Happened?
9–14 minutes -
The Tutor Handbook Vol No.0034 | The Archive — How a Tutor Preserves Useful Learning History Without Letting Old Labels Control the Future
29–43 minutes -
PSLE Science Reality Lab Vol No.005 | “95% Agree” — Who Was Actually Asked?
12–17 minutes -
PSLE Science Reality Lab Vol No.004 | “X Causes Y” — What Evidence Would a Causal Headline Need?
11–16 minutes -
PSLE Science Reality Lab Vol No.003 | “It Worked for Me” — Why a Testimonial Is Not Yet a Fair Test
11–17 minutes -
PSLE Science Reality Lab Vol No.002 | “Twice as Effective” — Effective Compared With What?
15–23 minutes -
The Tutor Handbook Vol No.0033 | The Retirement — How a Tutor Decides When a Known Fragility No Longer Deserves Special Monitoring
29–43 minutes -
PSLE Science Reality Lab Vol No.001 | “Scientifically Proven” — What Was Actually Tested?
17–26 minutes -
The Tutor Handbook Vol No.0032 | The Watchlist — How a Tutor Monitors a Known Fragility Without Making It the Centre of Every Lesson
30–45 minutes -
The Tutor Handbook Vol No.0031 | The New Baseline — How a Tutor Rebuilds the Learner Model After a Weak Link Has Needed Repair Twice
30–45 minutes -
PSLE Science Reasoning Casebook Case No.001 | The Cooling Cup Mystery — When the First Result Is Not Enough
13–20 minutes -
The Tutor Handbook Vol No.0030 | The Second Repair — How a Tutor Rebuilds a Reopened Weak Link Without Automatically Repeating the First Intervention
30–46 minutes -
The Tutor Handbook Vol No.0029 | The Reopening — How a Tutor Decides When Maintenance Is No Longer Enough and a Weak Link Needs Full Repair Again
29–43 minutes -
The Tutor Handbook Vol No.0028 | The Maintenance — How a Tutor Keeps a Confirmed Gain Alive Without Returning to Full Repair
26–40 minutes -
The Tutor Handbook Vol No.0026 | The Breakthrough — How a Tutor Decides Whether a Sudden Leap Is a Real Phase Change or One Exceptional Performance
28–43 minutes -
How to Keep a PSLE Science Investigation Record That Preserves What Actually Happened
24–36 minutes -
The Tutor Handbook Vol No.0025 | The Plateau — How a Tutor Decides Whether Progress Has Stalled, Hidden or Shifted Into a New Bottleneck
31–47 minutes -
The Tutor Handbook Vol No.0024 | The Trend — How a Tutor Decides Whether Improvement Is Stable Across Several Papers
29–44 minutes -
The Tutor Handbook Vol No.0023 | The Second Full Paper — How a Tutor Decides Whether a Repair Survived Reintegration
26–39 minutes -
The Tutor Handbook Vol No.0022 | The Full Paper — How a Tutor Reads Whole-System Performance Without Losing the First Weak Link
27–41 minutes -
The Tutor Handbook Vol No.0021 | The Timed Set — How a Tutor Adds the Clock Without Confusing Speed With Learning
30–45 minutes -
The Tutor Handbook Vol No.0020 | The Mixed Set — How a Tutor Tests Method Selection When No Topic Label Announces the Answer
28–42 minutes -
The Tutor Handbook Vol No.0019 | The Changed Question — How a Tutor Tests Whether Learning Travels When the Surface Changes
29–43 minutes -
The Tutor Handbook Vol No.0018 | The Reattempt — How a Tutor Uses a Second Attempt to Separate Recognition, Repair and Real Learning
27–40 minutes -
The Tutor Handbook Vol No.0017 | The Return — What a Tutor Learns When the Student Comes Back With Evidence From Outside the Lesson
31–46 minutes -
How to Make a PSLE Science Observation Drawing That Records What You See Without Drawing What You Expect
35–53 minutes -
The Tutor Handbook Vol No.0016 | The Handover — How a Tutor Ends Each Lesson So the Learner Can Carry the Next Move Alone
34–50 minutes -
The Tutor Handbook Vol No.0015 | The Learning Contract — How Tutor and Student Divide Responsibility Without Confusing Support With Control
29–44 minutes -
How to Compare Two Worked PSLE Science Examples to Find the Reasoning Pattern They Share
25–37 minutes -
The Tutor Handbook Vol No.0014 | The Student Review — How a Tutor Gives the Learner a Voice Without Handing Over Every Decision
32–48 minutes -
How to Tell Productive Struggle From Being Truly Stuck in PSLE Science Practice
13–19 minutes -
How to Space PSLE Science Retrieval So Learning Survives Beyond the Same Day
13–19 minutes -
The Tutor Handbook Vol No.0013 | The Parent Review — How a Tutor Explains Progress, Uncertainty and the Next Decision Without Turning the Child Into a Score
35–52 minutes -
How to Read Passive Sentences in PSLE Science Without Reversing What Acts on What
13–20 minutes -
How to Read a PSLE Science Cutaway Diagram Without Treating the Cut Surface as a Real Opening
14–21 minutes -
How to Tell “How Often” From “How Long” in PSLE Science Data
14–21 minutes -
How to Keep Your Prediction From Changing What You Record in PSLE Science
22–34 minutes -
The Tutor Handbook Vol No.0012 | The First Review — How a Tutor Decides Whether to Continue, Advance, Reclassify or Stop a Learning Route
25–38 minutes -
How to Test a PSLE Science Explanation by Asking What Would Happen If One Causal Link Were Removed
14–21 minutes -
How to Work Out What a PSLE Science Investigation Actually Measured When the Outcome Word Is Broad
13–19 minutes -
How to Generate More Than One Valid Method for a PSLE Science Investigation
9–14 minutes -
How to Build a Simple Scientific Model From PSLE Science Evidence and Test What It Predicts
11–17 minutes -
The Tutor Handbook Vol No.0011 | The First Month — How Repeated Lessons Turn Early Hypotheses Into a Stable Teaching Route
27–41 minutes -
How to Use PSLE Science Flashcards to Train Reasoning Instead of Reciting Definitions
23–35 minutes -
How to Use PSLE Science Mnemonics Without Letting the Memory Trick Replace the Science
13–20 minutes -
How to Learn From a PSLE Science Teacher Correction Without Turning It Into a Magic Keyword Rule
10–15 minutes -
How to Use PSLE Science Answer Frameworks Without Letting the Template Replace the Science
12–18 minutes -
The Tutor Handbook Vol No.0010 | The Second Lesson — Test the First Hypothesis Before Turning It Into a Long-Term Plan
28–42 minutes -
The Tutor Handbook Vol No.0009 | The First Lesson — What a Tutor Should Learn About the Student Before Trying to Teach Too Much
31–47 minutes -
The Tutor Handbook Vol No.0008 | Tutor–Student Fit — Match the Right Tutor Function to the Learner’s Actual Condition
30–45 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.
