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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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.016 | Master Nominalisation and Word-Class Shifts Without Making English Heavy | 第016课:掌握名词化与词性转换,但避免英语变得笨重
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.017 | Master Paraphrase, Reformulation and Meaning-Preserving Vocabulary Choices | 第017课:掌握改述、重述与不失真换词
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.018 | Master Lexical Bundles and Sentence Frames Without Sounding Formulaic | 第018课:掌握词块与句型框架,但避免模板化英语
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.019 | Build Domain-Specific Vocabulary Without Becoming Topic-Bound | 第019课:建立专业领域词汇,但避免只会一个领域
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.020 | Master Stance, Hedging and Evaluation Vocabulary Without Overclaiming | 第020课:掌握立场、限定与评价词汇,但不过度断言
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.021 | Master Lexical Cohesion, Repetition and Vocabulary Chains Without Thesaurus Overload | 第021课:掌握词汇衔接、必要重复与词汇链,但避免同义词堆砌
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.022 | Read for Vocabulary Like a Linguist | 第022课:像语言研究者一样从阅读中提取高级词汇
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.023 | Listen for Vocabulary Like a Linguist | 第023课:像语言研究者一样从听力与真实对话中提取高级词汇
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.024 | Write to Activate Advanced Vocabulary Without Forcing “Fancy” Words | 第024课:用写作激活高级词汇,但避免为了高级而硬塞难词
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.025 | Speak to Activate Advanced Vocabulary Under Real-Time Pressure | 第025课:用口语激活高级词汇,在实时压力下保持精准与自然
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.026 | Control Lexical Density and Information Load Without Making English Heavy | 第026课:控制词汇密度与信息负荷,但避免英语变得拥挤难读
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.027 | Master Semantic Prosody and Typical Contexts Without Misreading a Word’s “Tone” | 第027课:掌握语义倾向与典型语境,避免把词的“气质”理解错
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.028 | Control Levels of Specificity Without Overgeneralising or Over-Specifying | 第028课:掌握词汇具体度与抽象层级,避免过度概括或过度细化
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.029 | Master Degree, Intensity and Scalar Vocabulary Without Exaggerating | 第029课:掌握程度、强度与量级词汇,避免夸大
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.030 | Master Light Verbs and Delexicalised Expressions Without Overusing “Make / Do / Take / Have / Give” | 第030课:掌握轻动词与弱化词义表达,避免 make / do / take / have / give 乱搭配
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.031 | Master Comparison, Similarity and Contrast Vocabulary Without Creating False Equivalence | 第031课:掌握比较、相似与差异词汇,避免制造虚假等同
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.032 | Master Cause, Contribution and Association Vocabulary Without Overclaiming Causation | 第032课:掌握因果、贡献与关联词汇,避免把相关性写成因果
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.033 | Master Evidence, Findings, Claims and Conclusions Without Blurring the Stages of Reasoning | 第033课:掌握证据、发现、主张与结论词汇,避免把推理阶段混在一起
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.034 | Master Conditions, Constraints, Exceptions, Caveats and Thresholds Without Turning Rules into Absolutes | 第034课:掌握条件、限制、例外、限定与阈值,避免把规则写成绝对
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.035 | Master Probability, Likelihood, Possibility, Risk and Uncertainty Without Confusing What Can Happen with What Will Probably Happen | 第035课:掌握概率、可能性、风险与不确定性,避免把“可能发生”写成“很可能发生”
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.036 | Master Trend, Change, Stability and Volatility Without Turning Every Movement into a Trend | 第036课:掌握趋势、变化、稳定与波动词汇,避免把每一次变化都写成趋势
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.037 | Master Quantity, Proportion, Percentage, Ratio, Rate and Share Without Comparing Different Things as If They Were the Same | 第037课:掌握数量、比例、百分比、比率与占比,避免把不同指标当成同一种量
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.038 | Master Average, Mean, Median, Mode, Typical and Representative Values Without Letting One Number Pretend to Describe Everyone | 第038课:掌握平均值、中位数、众数、典型值与代表性,避免让一个数字假装代表所有人
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.039 | Master Distribution, Spread, Concentration and Dispersion Without Hiding How Values Are Arranged | 第039课:掌握分布、离散、集中与扩散词汇,避免只看平均值而忽略数值如何排列
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.040 | Master Frequency, Prevalence, Incidence, Occurrence and Recurrence Without Confusing How Often with How Many | 第040课:掌握频率、流行率、发生率、出现与复发词汇,避免把“多常发生”与“有多少”混为一谈
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.041 | Master Correlation, Association, Covariation and Independence Without Turning Relationship into Cause | 第041课:掌握相关、关联、共同变化与独立性,避免把“有关系”写成“有因果”
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.042 | Master Cause, Effect, Mechanism, Confounding, Mediation and Moderation Without Overclaiming What the Evidence Shows | 第042课:掌握因果、效应、机制、混杂、中介与调节,避免让证据说得过头
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.043 | Master Prediction, Forecast, Projection, Estimate and Scenario Without Turning a Possible Future into a Promise | 第043课:掌握预测、预报、推算、估计与情景,避免把“未来可能”写成“必然会发生”
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How to Learn Advanced English Vocabulary (Chinese Edition) | Lesson No.044 | Master Accuracy, Precision, Bias, Error, Reliability, Repeatability and Reproducibility Without Treating Every Consistent Number as Correct | 第044课:掌握准确度、精密度、偏差、误差、可靠性、重复性与再现性,避免把“稳定一致”误当“正确”
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How to Learn Advanced English Vocabulary (Chinese Edition) | Start Here | 高级英语词汇进阶学习
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How to Learn Basic English (Chinese Edition) | Lesson No.001 | Hello. My Name Is… | 你好,我叫……
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How to Learn Basic English (Chinese Edition) | Lesson No.002 | This Is… What Is This? | 这是……这是什么?
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How to Learn Basic English (Chinese Edition) | Lesson No.003 | I Like, I Want, I Need | 我喜欢、我想要、我需要
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How to Learn Basic English (Chinese Edition) | Lesson No.004 | Where Is It? | 它在哪里?
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How to Learn Basic English (Chinese Edition) | Lesson No.005 | Numbers and Age | 数字与年龄
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How to Learn Basic English (Chinese Edition) | Lesson No.006 | Time and Days | 时间与星期
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How to Learn Basic English (Chinese Edition) | Lesson No.007 | My Family | 我的家人
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How to Learn Basic English (Chinese Edition) | Lesson No.008 | My Daily Routine | 我的日常生活
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How to Learn Basic English (Chinese Edition) | Lesson No.009 | Food and Drink | 食物与饮料
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How to Learn Basic English (Chinese Edition) | Lesson No.010 | Can You Help Me? | 请求帮助
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How to Learn Basic English (Chinese Edition) | Lesson No.011 | Simple Questions | 简单问句
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How to Learn Basic English (Chinese Edition) | Lesson No.012 | Simple Negatives | 简单否定句
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How to Learn Basic English (Chinese Edition) | Lesson No.013 | People and Descriptions | 人物与描述
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How to Learn Basic English (Chinese Edition) | Lesson No.014 | Clothes and Colours | 衣服与颜色
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How to Learn Basic English (Chinese Edition) | Lesson No.015 | Home and Rooms | 家与房间
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How to Learn Basic English (Chinese Edition) | Lesson No.016 | Shopping and Money | 购物与金钱
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How to Learn Basic English (Chinese Edition) | Lesson No.017 | Weather and Seasons | 天气与季节
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How to Learn Basic English (Chinese Edition) | Lesson No.018 | Transport and Travel | 交通与出行
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How to Learn Basic English (Chinese Edition) | Lesson No.019 | Health and the Body | 身体与健康
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How to Learn Basic English (Chinese Edition) | Lesson No.020 | Plans and Future Time | 计划与未来时间
Browse every published Post
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PSLE Science Reality Lab Vol No.510 | “Composite Reflectivity = 55 dBZ” — Was 55 dBZ Measured at the Same Height Everywhere?
11–16 minutes -
PSLE Science Reality Lab Vol No.509 | “Pressure = 2000 dbar” — Is the Argo Float Exactly 2000 m Deep?
11–17 minutes -
PSLE Science Reality Lab Vol No.506 | “Wind Barb = 25 kt” — What Does the Weather Symbol Actually Encode?
10–16 minutes -
PSLE Science Reality Lab Vol No.505 | “Power Factor = 0.90” — Does That Mean the Device Is 90% Energy Efficient?
13–19 minutes -
PSLE Science Reality Lab Vol No.503 | “Cloud-Top Height = 12 km” — Was 12 km Directly Measured at Every Pixel?
14–21 minutes -
PSLE Science Reality Lab Vol No.502 | “Peak Ground Acceleration = 30% g” — Was the Ground Accelerating at 30% g the Whole Time?
14–21 minutes -
PSLE Science Reality Lab Vol No.501 | “Leq = 70 dBA” — Was the Sound 70 dBA the Whole Time?
13–19 minutes -
PSLE Science Reality Lab Vol No.499 | “Q30 Sequencing Quality” — Was the DNA Read 30 Times, or Is It 30% Accurate?
13–19 minutes -
PSLE Science Reality Lab Vol No.498 | “Occupancy Probability = 0.80” — Does the Species Occupy 80% of This Grid Cell?
13–20 minutes -
PSLE Science Reality Lab Vol No.497 | “Band 13 = 10.33 µm” — Did the Satellite Measure Only One Exact Wavelength?
14–21 minutes -
PSLE Science Reality Lab Vol No.495 | “Total Exposure Time = 20 Hours” — Was This One 20-Hour Photograph?
12–18 minutes -
PSLE Science Reality Lab Vol No.494 | “5σ Discovery” — Does Five Sigma Mean the Signal Is Five Times Stronger Than the Noise?
13–19 minutes -
PSLE Science Reality Lab Vol No.493 | “Lightning Count = 100” — Were There 100 Separate Flashes?
15–22 minutes -
PSLE Science Reality Lab Vol No.492 | “The Funnel Plot Looks Asymmetrical” — Does That Prove Studies Were Hidden?
21–32 minutes -
PSLE Science Reality Lab Vol No.491 | “This Wind Streamline Curves Here” — Did One Air Parcel Follow That Exact Path?
15–22 minutes -
PSLE Science Reality Lab Vol No.490 | “Warm-Up Time = 30 min” — Can We Trust the Reading Immediately After Switch-On?
13–19 minutes -
PSLE Science Reality Lab Vol No.486 | “MPN = 100 per 100 mL” — Were Exactly 100 Microorganisms Counted?
11–16 minutes -
Top 10 Model-Based Reasoning Skills Worth Learning
21–32 minutes -
Top 10 Statistical Reasoning Skills Worth Learning
22–33 minutes -
PSLE Science Reality Lab Vol No.489 | “Data Updated Today” — Were the Measurements Collected Today?
11–17 minutes -
PSLE Science Reality Lab Vol No.485 | “Extent of Occurrence = 10,000 km²” — Does the Species Occupy Every Point Inside That Boundary?
10–15 minutes -
Top 10 Systems Thinking Skills Worth Learning
22–33 minutes -
PSLE Science Reality Lab Vol No.484 | “Rainfall = T (Trace)” — Does That Mean No Rain Fell?
11–16 minutes -
PSLE Science Reality Lab Vol No.488 | “Dashed Fault Line” — Does a Broken Line Mean the Fault Stops or Is Not Real?
10–15 minutes -
Top 10 Argumentation Skills Worth Learning
21–32 minutes -
Top 10 Causal Reasoning Skills Worth Learning
20–31 minutes -
PSLE Science Reality Lab Vol No.483 | “IP67” — Does That Mean a Device Is Waterproof at Any Depth for Any Length of Time?
12–18 minutes -
PSLE Science Reality Lab Vol No.487 | “Species Distribution Map” — Does the Shaded Area Mean the Species Lives Everywhere Inside It?
15–22 minutes -
Top 10 Analogical Reasoning Skills Worth Learning
20–30 minutes -
Top 10 Spatial Reasoning Skills Worth Learning
21–31 minutes -
Top 10 Information Foraging Skills Worth Learning
25–38 minutes -
PSLE Science Reality Lab Vol No.482 | “Solar Flare X2” — Is It Just Two Units Stronger Than M2?
10–14 minutes -
PSLE Science Reality Lab Vol No.481 | “Earthquake Beachball” — Is the Black-and-White Circle a Map of the Fault on the Ground?
11–17 minutes -
PSLE Science Reality Lab Vol No.480 | “This Area Is Jurassic” — Did Every Rock Here Form at the Same Exact Time?
11–17 minutes -
PSLE Science Reality Lab Vol No.479 | “Preserved Specimen Record: 1924” — Does That Mean the Species Still Lives There Today?
9–14 minutes -
PSLE Science Reality Lab Vol No.478 | “Earthquake Depth = 10 km” — Was It Really Measured Exactly 10 km Deep?
11–16 minutes -
PSLE Science Reality Lab Vol No.477 | “DYFI Intensity VI for This ZIP Code” — Did Every Place There Experience Intensity VI?
11–17 minutes -
PSLE Science Reality Lab Vol No.476 | “Coordinate Uncertainty = 1000 m” — Was the Real Location Exactly 1000 m From the Map Point?
10–15 minutes -
PSLE Science Reality Lab Vol No.475 | “Complete Checklist” — Did the Observer Detect Every Bird That Was Present?
11–16 minutes -
PSLE Science Reality Lab Vol No.474 | “Magnitude 2 vs Magnitude 4” — Is 4 Twice as Bright as 2?
10–14 minutes -
PSLE Science Reality Lab Vol No.473 | “Long-Exposure Star Trails” — Did the Stars Really Draw Bright Lines Across Space?
10–14 minutes -
PSLE Science Reality Lab Vol No.472 | “30× Genome Coverage” — Was Every DNA Base Read Exactly 30 Times?
9–14 minutes -
PSLE Science Reality Lab Vol No.471 | “Phase-Folded Light Curve” — Is This One Continuous Orbit?
11–16 minutes -
PSLE Science Reality Lab Vol No.470 | “Research Grade” — Does That Mean the Species Identification Is Definitely Correct?
11–16 minutes -
PSLE Science Reality Lab Vol No.469 | “GPS Track” — Did the Animal Really Walk Along Every Straight Line on the Map?
11–17 minutes -
PSLE Science Reality Lab Vol No.468 | “Data Deficient” — Does That Mean the Species Is Safe, Rare or Unstudied?
11–17 minutes -
PSLE Science Reality Lab Vol No.467 | “Holotype” — Is This Specimen the Average Member of the Species?
13–19 minutes -
PSLE Science Reality Lab Vol No.466 | “Raw Image” — Is This Exactly the Original Science Data From the Spacecraft?
10–14 minutes -
PSLE Science Reality Lab Vol No.465 | “I² = 80%” — Does That Mean 80% of the Studies Disagree?
8–13 minutes -
PSLE Science Reality Lab Vol No.464 | “δ18O = −10‰” — Is 10‰ of the Water Oxygen-18?
9–13 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.
