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 4 Science Learning Guide | Mixed Concepts and Integrated Reasoning
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Primary 4 Science Learning Guide | Mixed Practice Workshop with Worked Answers
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Primary 4 Science Learning Guide | Multi-Step Problem Solving
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Primary 4 Science Learning Guide | No Change, Null Results and What You Can Conclude
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Primary 4 Science Learning Guide | Observation, Inference, Conclusion and Evidence
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Primary 4 Science Learning Guide | Observer Expectations, Confirmation Bias and Independent Checks
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Primary 4 Science Learning Guide | Open-Ended Answer Construction
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Primary 4 Science Learning Guide | Oral Explanation, Teach-Back and Questioning
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Primary 4 Science Learning Guide | Order Effects, Carryover and Resetting Between Trials
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Primary 4 Science Learning Guide | Pattern Recognition, Trends and Relationships
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Primary 4 Science Learning Guide | Photographs, Video and Time-Lapse Observation
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Primary 4 Science Learning Guide | Physical Model-Making, Testing and Revision
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Primary 4 Science Learning Guide | Plant and Digestive Systems Misconception Clinic
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Primary 4 Science Learning Guide | Plant and Human Systems
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Primary 4 Science Learning Guide | Plant Parts, Functions and Whole-Plant Reasoning
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Primary 4 Science Learning Guide | Practical Tests and Performance Tasks Under Real Conditions
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Primary 4 Science Learning Guide | Prediction, What-If Reasoning and Transfer
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Primary 4 Science Learning Guide | Procedure Writing and Investigation Design
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Primary 4 Science Learning Guide | Question Reading, Command Words and Answer Precision
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Primary 4 Science Learning Guide | Rate of Change, Change Per Unit Time and Fair Time Comparisons
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Primary 4 Science Learning Guide | Raw Data, Derived Values and the Evidence Trail
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Primary 4 Science Learning Guide | Reasonableness, Estimation and Sanity Checks
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Primary 4 Science Learning Guide | Relationships, Evidence and Explanation
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Primary 4 Science Learning Guide | Repeated Trials, Reliability and Consistency
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Primary 4 Science Learning Guide | Replication, Reproducibility and Independent Group Checks
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Primary 4 Science Learning Guide | Researching with Books, Websites and Secondary Sources
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Primary 4 Science Learning Guide | Safe Mini-Investigations at Home
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Primary 4 Science Learning Guide | Same Specimen Before–After vs Different Similar Specimens
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Primary 4 Science Learning Guide | Sampling, Representative Cases and Avoiding Cherry-Picking
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Primary 4 Science Learning Guide | Science Journals and Observation Logs
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Primary 4 Science Learning Guide | Science Learning Trails and Field Observation
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Primary 4 Science Learning Guide | Science Portfolios, Evidence of Growth and Reflection
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Primary 4 Science Learning Guide | Science Project Planning, Evidence and Presentation
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Primary 4 Science Learning Guide | Science Reading Comprehension and Dense Question Stems
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Primary 4 Science Learning Guide | Scientific Communication and Presenting Findings
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Primary 4 Science Learning Guide | Scientific Diagrams, Labels, Arrows and Annotation
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Primary 4 Science Learning Guide | Scientific Models and Their Limits
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Primary 4 Science Learning Guide | Scientific Vocabulary, Precision and Language
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Primary 4 Science Learning Guide | Seeking Clarification, Resolving Ambiguity and Asking the Next Useful Question
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Primary 4 Science Learning Guide | Self-Assessment, Rubrics and Success Criteria
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Primary 4 Science Learning Guide | Self-Explanation and Metacognitive Checking
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Primary 4 Science Learning Guide | Simulations and Virtual Investigations
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Primary 4 Science Learning Guide | Small Differences, Scale Intervals and Honest Precision
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Primary 4 Science Learning Guide | Testable Questions, Hypotheses and Scientific Curiosity
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Primary 4 Science Learning Guide | Treatment Duration, Observation Time and Measurement Intervals
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Primary 4 Science Learning Hub | Relationships, Systems, Matter, Light, Heat & Evidence
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Primary 4 Science Readiness | The Capability Floors Needed Before P5
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Primary 4 Science Sengkang | Relationships & Evidence Diagnostic
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Primary 4 Science Sengkang | The Voyage of Water
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Primary 4 Science Tuition at Punggol | Building Strong Foundations with eduKate
Browse every published Post
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How to Infer What a Part Does in PSLE Science by Comparing the System With and Without It
13–20 minutes -
How to Choose a Measuring Instrument for PSLE Science That Has the Right Range and Resolution
13–20 minutes -
How to Decide What to Measure in a PSLE Science Investigation So the Evidence Answers the Question
14–22 minutes -
How to Improve Productive Struggle | Difficulty, Search, Support and Better Recovery
14–21 minutes -
How Worked Examples Work in Teaching | Designing the Route, Exposing Expert Decisions and Fading Support Toward Independence
19–29 minutes -
Top 10 Perspective-Taking Skills Worth Learning
24–36 minutes -
How to Improve Help-Seeking | When to Ask, What to Ask and How to Return to Independence
16–23 minutes -
How to Decide Exactly When a PSLE Science Process Starts or Ends Before You Time It
14–20 minutes -
How to Translate the Same PSLE Science Relationship Between Words, Diagrams, Tables and Graphs
12–19 minutes -
How to Turn Raw PSLE Science Observations Into a Results Table Without Mixing the Variables
13–19 minutes -
How to Make a PSLE Science Decision When Several Criteria Matter at Once
13–19 minutes -
How to Read Approximate and Rounded Values in PSLE Science Without Inventing Extra Precision
9–13 minutes -
How to Tell Whether Two PSLE Science Answers Say the Same Science in Different Words
8–12 minutes -
How to Choose Where to Measure in a PSLE Science Investigation So the Reading Answers the Right Question
8–12 minutes -
How to Find the Same PSLE Science Reasoning Weakness Hiding Across Different Topics
9–14 minutes -
How to Use a New Scientific Rule Given Inside a PSLE Science Question
10–15 minutes -
How to Decide What to Memorise and What to Reconstruct in PSLE Science
10–14 minutes -
How to Compare Two Different PSLE Science Methods That Could Both Be Valid
9–13 minutes -
How to Know When a PSLE Science Answer Should Come From the Given Evidence and When It Needs Scientific Knowledge
10–15 minutes -
How to Tell Random Variation From a Systematic Shift in PSLE Science Results
13–20 minutes -
How to Decide Whether a PSLE Science Investigation Needs a Starting Measurement Before the Test Begins
11–16 minutes -
How to Turn PSLE Science Feedback Into a Testable Repair
11–17 minutes -
How to Tell When You Know the PSLE Science but Cannot Yet Write It Clearly
12–18 minutes -
How to Read “Same” in PSLE Science Without Assuming Everything Is Identical
14–21 minutes -
How to Read a Zoomed-In PSLE Science Diagram Without Treating the Inset as a Separate Object
12–18 minutes -
How to Match Time Points Before Comparing Two PSLE Science Set-Ups
10–14 minutes -
How to Turn a PSLE Science Claim Into an Observable Check
12–18 minutes -
How to Compare Your First and Corrected PSLE Science Answers to Find What Actually Changed
14–21 minutes -
How to Read a PSLE Science Result Given as a Range Without Turning It Into One Exact Value
12–18 minutes -
How to Read At Least, At Most, Minimum and Maximum in PSLE Science Without Reversing the Boundary
10–15 minutes -
How to Read a PSLE Science Diagram When Some Parts Are Omitted for Clarity
13–19 minutes -
How to Read a PSLE Science Legend or Key Without Treating Colour, Shading and Line Style as Evidence by Themselves
13–19 minutes -
How to Read What One Row Represents in a PSLE Science Results Table Before Comparing the Numbers
12–18 minutes -
How to Turn PSLE Science MCQ Success Into an Independent Open-Ended Explanation
13–19 minutes -
How to Tell a PSLE Science Result, Conclusion and Explanation Apart
13–20 minutes -
Top 10 Classification Skills Worth Learning
20–29 minutes -
How to Improve Reflection | Evidence, Interpretation, Repair and Better Next Attempts
14–21 minutes -
How to Decide Whether a PSLE Science Mistake Needs Relearning or More Application Practice
17–25 minutes -
How to Choose the True Science Fact That Actually Answers a PSLE Science Open-Ended Question
14–20 minutes -
How to Choose Similar Specimens for a PSLE Science Investigation Without Cherry-Picking the Result
14–20 minutes -
How to Draw a PSLE Science Explanation Diagram That Shows the Science, Not Just the Picture
15–23 minutes -
How to Read a Two-Stage PSLE Science Investigation Without Confusing Preparation With the Variable Being Tested
16–23 minutes -
How to Spot a “Controlled” Condition That Is Quietly Changing During a PSLE Science Investigation
14–21 minutes -
How to Reason With P, Q, X and Y in PSLE Science Without Guessing What the Letters Mean
14–21 minutes -
How to Turn a PSLE Science Results Table Into an Honest Graph Without Distorting the Data
14–20 minutes -
How to Improve Metacognition | Planning, Monitoring, Calibration and Better Self-Regulation
18–27 minutes -
How to Build a Targeted PSLE Science Mini-Practice Set From One Error Pattern
16–24 minutes -
How to Give Two Distinct Scientific Reasons in PSLE Science Without Saying the Same Reason Twice
13–19 minutes -
How to Put PSLE Science Data in the Right Scientific Order Before Deciding the Trend
11–17 minutes -
How to Tell What Must Be True From What Could Be True in PSLE Science
12–17 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.
