Compassvale View’s launch history begins in November 2006 with a reported offer of 390 flats: 105 three-room and 285 four-room standard flats. The mix is a useful local example of how a small set of housing figures can support clear reasoning about totals, ratios and percentages.
A contemporary report dated 28 November, preserved in a forum reproduction, described applications ending on 18 December and anticipated completion in 2010. Housing Map’s secondary index also places the launch in November 2006. The anticipated completion is retained as a forecast, not relabelled as a verified outcome.
This guide explains the historical record, works through the mix and develops original practice in charts, rounding and evidence-led writing. The numbers count flats in the reported offer. They do not establish household sizes, residents’ circumstances, present population or current housing availability.
eduKateSengkang • Neighbourhood history and learning
Choose your reading route
Start with the history, follow a learning question, or try the worked examples. Historical records and original classroom illustrations are clearly distinguished.
Route 1 · Chapters 1–2: Read the launch record
What the contemporary launch report establishes; A flat category is not a portrait of a household.
Route 2 · Chapters 3–4: Calculate and check
Worked total and ratio: from two categories to twenty-six parts; Worked percentages: part, whole and an honest rounded answer.
Route 3 · Chapters 5–6: Represent the proportions
Build a strip model and explain what its boxes mean; Compare bars fairly: counts and percentages answer different questions.
Route 4 · Chapters 7–8: Read place and time
Rounding changes the display, not the underlying launch counts; A launch-era map description is not a current journey promise.
Route 5 · Chapters 9–10: Practise and write
Write a short history that connects place, numbers and time; Independent practice and answers that show the reasoning.
Full chapter index · Worked examples and practice · Sources and evidence limits · Continue exploring
Contents
Chapters 1–2 · Read the launch record
Chapters 3–4 · Calculate and check
3. Worked total and ratio: from two categories to twenty-six parts
4. Worked percentages: part, whole and an honest rounded answer
Chapters 5–6 · Represent the proportions
5. Build a strip model and explain what its boxes mean
6. Compare bars fairly: counts and percentages answer different questions
Chapters 7–8 · Read place and time
7. Rounding changes the display, not the underlying launch counts
8. A launch-era map description is not a current journey promise
Chapters 9–10 · Practise and write
9. Write a short history that connects place, numbers and time
10. Independent practice and answers that show the reasoning
CHAPTER 1 OF 10 • Read the launch record
1. What the contemporary launch report establishes
A contemporary report is useful because it preserves information circulating near the event it describes. It can show the offer, the categories advertised and the expectations at that moment. It is not a later completion record simply because we read it many years afterwards. The writer’s historical task is to retain the document’s original time perspective.
The copy used here is a forum reproduction. The apparent original report and the website preserving it play different roles. Identify the report date and the access location separately, rather than presenting a forum participant as the original housing authority. Reproduced material can be valuable, but its provenance should remain visible to a reader checking the account.
The application window is an administrative period from the historical exercise. It does not remain open because the words are still online. Likewise, language anticipating completion describes an expectation at the time. A sentence that says “should be completed” must not become “was completed” during paraphrase unless another appropriate source establishes that later event.
The report also situated the development through nearby transport and facilities. Those descriptions belong to its launch setting. They do not establish present walking times or guarantee a particular route today. A family reading a history should be able to distinguish a historical location description from current practical directions before planning a visit.
Make a four-field source card: development name, event, report date and source type. Add the reported quantities in a separate field with their units. This takes little space but prevents a table row from becoming detached from the event it describes. If a later document supplies more information, add another card rather than silently changing the first.
An original comparison uses a school’s announcement of a future activity. The notice establishes what was offered and expected then; a later account is needed to establish what eventually happened. This analogy helps a learner read launch-era language fairly. We do not need to accuse the old report of being incomplete simply because it was not written to answer every later historical question.
CHAPTER 2 OF 10 • Read the launch record
2. A flat category is not a portrait of a household
The reported mix describes categories of flats. That is a clear and useful kind of information, but it is not a census of the people who later occupied them. A category does not identify residents’ ages, relationships, occupations or preferences. Keeping the counted unit visible prevents a mathematical exercise from becoming an unsupported social claim.
The category name is also not a direct count of bedrooms or occupants. Do not draw a three-person family beside every three-room flat or a four-person family beside every four-room flat. Such illustrations make an unsupported connection look natural. A more honest display uses labelled bars, boxes or written quantities rather than imagined households.
An original classroom example makes the distinction simpler. A school inventory may list small and large tables. That tells us about table categories, not how many pupils sit at each one throughout the day. To answer the pupil question, we would need observations or records about use. Object categories and user counts are related only when additional evidence connects them.
For Compassvale View, a sound sentence begins “Of the flats in the reported offer…” That phrase supplies both unit and scope. Replacing it with “Of the residents…” changes the subject. A child may carry out every arithmetic step correctly and still make that interpretation error. Read the final sentence as carefully as the calculation.
Categories should not become judgements either. A housing mix can be described without ranking households or attaching stereotypes to the homes. A learning display can be colourful and welcoming while remaining neutral about people’s circumstances. The aim is to understand what a record contains, not to invent a story about who deserves or chooses each category.
Before moving to percentages, ask three questions aloud: what is one item in this count, which collection forms the whole, and what does the source not count? Suitable answers are a flat, the reported offer, and residents or household characteristics. These simple questions establish a strong foundation for the calculations that follow.
CHAPTER 3 OF 10 • Calculate and check
3. Worked total and ratio: from two categories to twenty-six parts
Begin by checking the whole: 105 plus 285 equals 390. This check matters because later shares depend on the denominator. If categories were missing or overlapping, adding them would need further care. In this reported two-category mix, the figures are presented as parts of the stated total, and the addition confirms their arithmetic consistency.
The ratio of three-room to four-room flats is 105:285. Divide both terms by fifteen to obtain 7:19. Both terms must be divided by the same non-zero factor; otherwise the comparison changes. The reduced ratio preserves the relationship while making it easier to represent in equal parts.
Seven plus nineteen gives twenty-six total ratio parts. One part corresponds to fifteen flats in the reported quantities. Multiplying seven by fifteen returns 105, and multiplying nineteen by fifteen returns 285. Multiplying twenty-six by fifteen returns 390. These reverse checks show that the simplified ratio and the original counts describe the same comparison.
Order is essential. Three-room to four-room is 7:19, while four-room to three-room is 19:7. Neither is wrong in isolation; the question decides which is appropriate. Write the category names beside the ratio before simplifying. A beautifully reduced answer in the wrong order still answers a different question.
Try independently with an invented collection: forty-two red cards and one hundred fourteen blue cards. Their ratio is again 7:19 after dividing by six. What stays the same, and what changes? The proportions remain the same, but the actual quantities and the multiplier represented by one ratio part differ. This example is not another housing record.
The ratio alone does not reveal the original total. Many collections can share 7:19. To reconstruct the original quantities, a learner needs an additional scale, such as the total or the value of one part. That distinction is useful in local-history work: a proportion can summarise the offer, but it should not replace the source figures when exact counts are the question.
There is another useful inverse problem. Suppose a fictional collection has the same seven-to-nineteen ratio and contains fifty-two items altogether. Since the whole has twenty-six parts, each part represents two items. The categories therefore contain fourteen and thirty-eight items. Check the total and the ratio separately. This exercise shows why dividing by the sum of the ratio terms comes before multiplying by an individual term. It also reinforces that identical proportions do not mean identical collections or identical histories.
CHAPTER 4 OF 10 • Calculate and check
4. Worked percentages: part, whole and an honest rounded answer
To find a category’s share of all flats in the reported offer, divide that category by the whole and multiply by one hundred. The three-room calculation is 105 divided by 390, multiplied by one hundred. It gives approximately 26.923%. The four-room calculation gives approximately 73.077%. The long decimals arise from the fractions, not from uncertainty about which figures were entered.
Rounded to one decimal place, the shares are 26.9% and 73.1%. To the nearest whole percent, they are about 27% and 73%. Use “about” or an approximation sign when presenting rounded values. Do not write a rounded share as though it were an exact fraction of one hundred in the original record.
A useful check is that the two shares add to one hundred percent here. Another is to compare with a quarter and three quarters: the smaller share is slightly more than a quarter, and the larger is slightly less than three quarters. This gives a sensible range before a calculator displays any decimal digits.
The most common denominator error is dividing one category by the other and calling the result a share of the total. That computes a different comparison. The ratio 7:19 describes part to part; the fraction 7/26 describes the smaller part of the whole. Make the learner say both in words so the difference is understood rather than memorised.
Try independently: a learner says the smaller category represents seven percent because its reduced ratio starts with seven. Explain why that is wrong. Seven is a count of ratio parts out of twenty-six, not out of one hundred. Converting to percent requires seven divided by twenty-six, multiplied by one hundred.
A strong final sentence reads: “About twenty-seven percent of the flats in the reported launch mix were three-room flats.” It names the approximate nature, counted unit and historical scope. Do not remove those words merely to make the sentence shorter. They are the difference between a correct interpretation and an attractive but misleading number.
For a mental estimate, compare the smaller count with one quarter of the total. A quarter of 390 is 97.5, which is below 105, so the smaller share must exceed twenty-five percent. Compare it with three tenths of the total, which is 117, above 105. The share must therefore lie between twenty-five and thirty percent. This estimate cannot replace an exact calculation when one is requested, but it can catch a misplaced decimal or an accidental reversal before the final answer is written.
| Reported category | Count | Calculated share, rounded |
|---|---|---|
| Three-room flats | 105 | 26.9% |
| Four-room flats | 285 | 73.1% |
| Total | 390 | 100.0% |
CHAPTER 5 OF 10 • Represent the proportions
5. Build a strip model and explain what its boxes mean
A twenty-six-part strip is a direct visual model of the simplified ratio. Draw equal cells, shade seven for one category and nineteen for the other, then label the colours with the category names. A legend is not optional decoration: without it, a reader may know the proportions but not which share belongs to which category.
Each equal cell represents fifteen flats when the strip is scaled to the historical figures. It does not represent one actual block, one storey or one household. Keep that meaning in the caption. A mathematical representation can clarify quantity while saying nothing about the physical arrangement of the buildings.
An original worked caption is: “Equal cells show ratio parts in the reported flat mix; each part corresponds to fifteen flats.” This is better than “a map of Compassvale View”. The latter would imply a spatial relationship that the diagram does not establish. A familiar place name should not make a quantity diagram look like a plan.
Now test the model in reverse. If a learner shades only six cells for the smaller category but leaves the larger at nineteen, does the drawing still show 7:19? No. The total number of cells has changed, and so has the ratio. A roughly similar visual impression is not enough when exact parts are being represented.
For a younger child, make the equal parts with paper tiles. For an older learner, ask why a hundred-cell grid cannot show the exact shares using only whole coloured cells. The exact proportion is not a whole number of percent. A hundred-cell display therefore needs an approximation or partial cells, clearly explained.
Finish by comparing the strip with the original counts. The strip highlights proportion; the written figures preserve exact quantity. Neither is the universally best form. Choose the representation that answers the reader’s question, and explain what information has been simplified. That is how a local numerical fact becomes an exercise in visual literacy rather than a decorative chart.
CHAPTER 6 OF 10 • Represent the proportions
6. Compare bars fairly: counts and percentages answer different questions
A bar chart of counts and a bar chart of percentages can both describe the mix, but their axes mean different things. A count chart preserves the number of flats in each category. A percentage chart places the categories within a whole of one hundred percent. The category labels may be identical while the numerical scale changes.
For a count comparison, begin both bars from the same zero baseline and use a consistent scale. If one bar is drawn with a different scale, the visual comparison becomes meaningless even if the written numbers remain correct. A beginner’s chart should make the larger category visibly larger in proportion to the values being shown.
Try an original visual-error exercise. A learner draws two rectangles with heights proportional to the counts but also makes the larger rectangle wider. The area difference now exaggerates the comparison if readers perceive area rather than height. Repair the display with equal-width bars and a labelled numerical axis. Simpler shapes can communicate more accurately.
A second exercise uses two different fictional developments. One has twenty flats split in a particular proportion; another has two hundred with the same proportion. Their percentage bars match, but their count bars do not. This is not a contradiction. Percentages show relative composition, while counts show absolute quantity. The chosen form should match the question.
Do not use a cropped baseline to make one category appear almost absent in a simple count chart. If a narrowed scale is needed for a different analytical purpose, label it unmistakably and explain the choice. For this introductory mix comparison, a zero baseline usually makes the relationship easier to inspect without additional interpretation.
Write a caption naming the development, reported offer, categories and source. The caption should also say if percentages are rounded. A chart with attractive colours but no units asks the reader to guess what its bars count. Clear labelling is part of the mathematical answer, not an optional finishing step after the arithmetic has been completed.
A percentage-point comparison is different from a percentage increase. In an invented chart, a category’s share changes from twenty percent to thirty percent. The difference is ten percentage points; relative to the original twenty percent, the increase is fifty percent. These are not alternative names for the same calculation. No such change over time is established for Compassvale View by its single reported launch mix. The invented example explains why a writer should not call two categories’ different shares a historical increase.
CHAPTER 7 OF 10 • Read place and time
7. Rounding changes the display, not the underlying launch counts
Rounding is a way to communicate at a chosen precision. It does not alter the source quantities. The shares can be displayed to a whole percent or one decimal place while the counts remain the same. A reader should be able to move back to the exact figures rather than being asked to reconstruct them from a rounded summary.
A useful inverse check shows the limitation. Multiply the whole-percent approximation for the smaller category by the total. The result will be close to the reported count, but it need not reproduce it exactly. That is expected because information was lost during rounding. Do not announce a discrepancy in the historical record merely because an approximate percentage gives a slightly different reverse calculation.
An invented example makes the point without repeatedly calculating the housing figures. If two of three cards are blue, their share is approximately sixty-seven percent. Multiplying 0.67 by three gives 2.01 cards. There are not 2.01 actual cards; the decimal comes from using a rounded share in a reverse calculation. The exact fraction remains two thirds.
Choose precision to suit the communication task. A short explanation may use “about a quarter”, while a worked exercise should retain enough detail to show the calculation. A chart may show one decimal place and list counts alongside it. Do not add many decimal places simply to make a result look more scientific; explain the level chosen.
Try independently: a learner rounds the two category counts before checking whether they add to the exact historical total. Why is this a weak first check? Because it introduces approximation before verifying the exact arithmetic. Check the original counts first, then choose a rounded display. This order preserves a reliable reference point.
End with a two-part statement: the source counts are exact as reported; the displayed percentages are calculated and rounded here. That sentence distinguishes documentary evidence from the mathematical transformation applied to it. It is particularly useful when a school project places a historical table beside a colourful visual summary.
Rounding can also be checked by retaining a fraction beside the display. The smaller share is exactly seven twenty-sixths for the stated ratio, even when a caption uses a whole-percent approximation. If two displays appear to disagree, first ask whether they use different rounding rather than assuming different underlying records. This is a small but useful research habit: compare the input figures, the transformation and the chosen precision in that order. A display disagreement is not automatically a disagreement about the historical offer.
CHAPTER 8 OF 10 • Read place and time
8. A launch-era map description is not a current journey promise
The old report used transport, commercial facilities and green connections to situate the offer. Those details show how the place was described to readers at launch. They should not be copied into a present-day instruction without checking current maps and conditions. Historical context and practical travel planning require different kinds of evidence.
Distance also needs a defined measure. A straight line between two points is not the same as a walkable route, and a walkable route does not imply an identical travel time for everyone. A current journey can depend on crossings, access, pace and the person’s requirements. This article does not supply measurements or certify a route.
For a family learning activity, use a fictional map first. Mark a home, a station and two possible paths. Make one path shorter in drawn length but place an unspecified crossing on it. Ask what additional information would be needed before recommending a route. The right answer is a question about the missing condition, not an invented journey time.
On a suitable real visit, choose one permitted observation such as a directional sign. Record its wording, approximate position and date without photographing residents or private activity. Describe what it points towards rather than claiming that every person takes the indicated path. A small sketch can be enough to explore wayfinding respectfully.
Now pair the observation with a concise historical sentence from the launch record. Keep the dates visible. The old description tells us about the reported setting then; the notebook tells us what was visible during a particular later visit. A present photograph cannot independently prove how the same location looked at launch.
The benefit is a more careful sense of place. Compassvale View is not only a percentage exercise, but neither should its history become a set of unverified promises about convenience today. A learner can appreciate the relationship between housing and surroundings while remaining clear about which connections have actually been established.
CHAPTER 9 OF 10 • Practise and write
9. Write a short history that connects place, numbers and time
A useful school response can combine the launch history with a worked numerical explanation. Begin with the full development name and the kind of event. Then introduce the reported mix and explain one transformation, such as a ratio or percentage. End by distinguishing the launch-era expectation from any later outcome not established by the consulted record.
An original paragraph plan has four sentences. The first anchors the historical offer. The second identifies the two categories and their whole. The third explains what a calculated proportion means. The fourth states an important limit, such as not inferring residents’ circumstances. This gives the paragraph a purpose rather than making it a list of disconnected figures.
Compare two interpretations. “Most of the reported flats belonged to the four-room category” is supported by the mix. “Most families preferred four-room homes” is a different claim about preferences. The second would need evidence about choices, opportunities and the people making them. A supply breakdown alone does not explain demand or motivation.
Try a revision exercise: “The project was completed at launch, and seventy-three percent of people lived in four-room flats.” Identify the event error and the unit error. Repair the first with a launch label and the second with a share of the reported flats. If completion is discussed, keep the original forecast wording rather than inventing a confirmed outcome.
A strong answer need not repeat every calculation. It can show one carefully chosen method, a check and an accurate interpretation. For a longer assignment, add the strip model or bar chart with a meaningful caption. The prose should explain the visual’s role rather than restating every number shown beside it.
Read the finished response aloud and ask whether a listener can distinguish history, calculation and original illustration. If those categories blur, add a label or move the example into its own paragraph. The goal is a readable account that can also be checked. Clear writing and careful evidence are partners, not competing demands.
Give the visual an audience test before submitting it. Cover the prose and ask someone what the chart alone appears to claim. Then uncover the caption and compare their interpretation with the intended meaning. If the reader thought the boxes were buildings, the label needs repair; if they thought the percentages counted people, the unit needs emphasis. This original checking method improves communication without adding another historical claim. It tests the explanation, not the intelligence of the reader.
CHAPTER 10 OF 10 • Practise and write
10. Independent practice and answers that show the reasoning
Try three tasks without looking at the worked steps. First, simplify the two-category ratio and explain how many total equal parts it contains. Second, state the denominator for the smaller category’s share of the whole. Third, explain why a twenty-six-cell strip is not a plan of the development. Give reasons, not only numerical answers.
The first answer is seven to nineteen, with twenty-six total parts. The second uses the total flat count, or equivalently all twenty-six ratio parts. The third distinguishes a quantity model from spatial evidence. A learner who can explain those connections understands the representation rather than merely recognising familiar figures.
For a new invented problem, a collection has twenty-one yellow cards and fifty-seven purple cards. Find the ratio, total and smaller category’s fraction of the whole. The answers are 7:19, seventy-eight cards and 7/26. It shares the historical mix’s proportions but not its quantity. Label the cards as invented so the numbers cannot be mistaken for another source.
Now diagnose this sentence: “The percentage chart proves that a particular type of family lived in each category.” A sound answer says that the chart represents flats, while family composition is not supplied. The problem is not fixed by drawing more realistic people. It is fixed by returning to the unit that the evidence actually counts.
For a family task, make a display with a source note, one model and a three-sentence explanation. A parent can check it by asking what one box or one axis unit represents. If the child can answer accurately and name a limitation, the display has done its job. There is no need to make it resemble a professional site plan.
Continue with the Compassvale neighbourhood guide to place this development within the wider locality. Keep its launch figures attached to Compassvale View rather than transferring them to other similarly named places. The enduring lesson is how to transform a small historical dataset without losing the event, unit or scope that makes the numbers meaningful.
Frequently asked questions
Is 2006 the completion year established here?
No. It is the launch year discussed in this guide. The contemporary report anticipated completion later; this article does not convert that expectation into independent confirmation of the eventual completion date.
What does the 390-flat total describe?
It describes the reported launch offer and its two categories. It is not a current population figure, a count of residents or evidence of household composition. Keep the unit and historical scope beside the number.
Why does the ratio have twenty-six parts?
The reduced comparison is seven to nineteen. Adding both terms gives twenty-six parts in the whole. Using nineteen alone as the denominator would compare the smaller category with the larger, not with the total.
Are 26.9% and 73.1% figures from the source?
They are calculations made here from the reported counts, rounded to one decimal place. The source counts and the calculated presentation should remain distinct. More decimal places do not create additional historical evidence.
Can the old report be used for today’s walking directions?
Not without current checking. A historical description of surrounding facilities is not a verified present route or travel-time promise. Use current maps, signs and conditions for a suitable journey and respect the residential setting.
Sources and evidence limits
Historical sources checked on 18 October 2026 (UTC); expanded teaching article reviewed on 21 October 2026. Launch records and historical reports do not establish current access, application rules or every block’s actual completion date.
28 November 2006 launch report — third-party forum reproduction
Housing Map BTO index — secondary chronology
The worked activities are original learning examples, not records of residents’ circumstances. The featured classroom photograph illustrates eduKate’s learning context; it is not a photograph of this location.
