eduKateSG · Jalan Dermawan family guide
Choose your reading route
Start with the part that helps your family now. All eight chapters remain available below.
ROUTE 1 · CHAPTER 1
Check the place
Start with the official destination facts and what remains unconfirmed.
Full chapter index · Learning check · Clementi Mathematics teaching reference
A local playground can offer a welcome break without becoming a project. Jalan Dermawan Playground is the destination here; the first job is to check its location and conditions, then let suitable play take priority.
The learning idea comes afterwards: when several clues describe an order, do they determine one arrangement or leave several possible answers? Children often find an answer that works and stop before checking whether it is unique.
The worked examples use three invented cards labelled A, B and C. They are not directions through the playground, rules for its equipment or observations about other children. A table at home is all the activity needs.
Contents
Chapters 1–3: Plan and understand
Chapters 4–6: Try, check and transfer
Chapters 7–8: Support and questions
NParks places Jalan Dermawan Playground along Jalan Dermawan and describes play structures including slides and a climbing frame. Its directory lists opening hours as 24 hours. These are the verified destination facts used in this guide.
The entry does not establish a family travel time or guarantee the present condition of an individual structure. Check current notices before leaving and use the official navigation information to identify the place. Verify your own approach rather than relying on an assumed station exit.
This article does not confirm toilets, parking, covered seating or a specific step-free route. An unconfirmed facility should be checked separately if it matters to your outing. Lack of confirmation here is not a claim that the facility does not exist.
Keep the purpose modest: an appropriate short visit and one optional reasoning exercise later. No part of the exercise requires following a fixed order through actual equipment. The park description and the paper model have different jobs.
| Official detail | Directory information |
|---|---|
| Location | Along Jalan Dermawan |
| Features described | Play structures including slides and a climbing frame |
| Opening hours | Open 24 hours |
Begin with weather, road crossings, supervision and the child’s comfort. A 24-hour listing describes published opening hours, not a recommendation to visit at every hour. Be willing to shorten the outing or postpone it when conditions do not suit your family.
If suitable play structures are available, let the child enjoy them according to instructions and adult judgment. Do not turn movement on a climbing frame into an ordering puzzle. Attention belongs on safe participation, not answering questions mid-action.
An optional prompt later might be “What did we do before we came home?” Let the child give their own recollection. You are practising sequence language, not testing whether they followed a compulsory itinerary.
Real family days can include repeated actions, changes of plan and pauses. That is one reason to use a cleaner home model for the formal exercise. Three cards used once each make it possible to study ordering without pretending that everyday life always follows a simple straight line.
Place three labelled cards in a left-to-right row. Each card appears exactly once. In this invented model, “A is before B” means A is somewhere to the left of B. It does not necessarily mean A is immediately beside B.
With only that clue, A-B-C works, A-C-B works and C-A-B works. Each puts A before B. The clue is useful, but it does not tell us where C must go.
Now contrast “A is immediately before B.” A and B must be adjacent in that order. A-B-C and C-A-B satisfy it; A-C-B does not. The additional word narrows the possibilities.
Ask the child to explain the difference by moving cards, not just repeating the definition. The distinction matters in comprehension questions and instructions: a statement can specify an order without specifying a gap, a position number or adjacency. Those are separate pieces of information.
Add a second clue: C is before B. Keep the original clue that A is before B. Both must hold at the same time.
A-C-B satisfies both. C-A-B also satisfies both. B must be last because both other cards must precede it, but the clues do not determine whether A or C comes first.
An arrangement such as A-B-C satisfies the first clue but violates the second. It is not enough to find one familiar feature and stop checking. Read each clue against the same arrangement.
Use a simple check routine: identify the row, point to A and B, then point to C and B. If a child rearranges the cards halfway through the checks, start again with one fixed row. Otherwise they may accidentally verify different clues against different arrangements. The answer must satisfy the complete set of constraints together.
Under the two clues A before B and C before B, there are exactly two valid orders: A-C-B and C-A-B. A child who produces either has found a possible arrangement. They have not shown that it is the only one.
The table lists all six orders for three distinct cards. Each row is checked against both clues. Listing all cases is manageable here and makes the claim of exactly two solutions transparent.
Add a third clue: A is before C. Now A-C-B is the only valid order. C-A-B violates the new clue. Notice that no clue used the word immediately, yet with just three cards the combined constraints fix the complete row.
Ask what new information removed the uncertainty. The answer is the relationship between A and C, which the earlier clues left open. This is a productive way to read a multi-step problem: identify not only what is known but also which relationship remains unspecified.
| Card order | A before B? | C before B? | Both satisfied? |
|---|---|---|---|
| A-B-C | Yes | No | No |
| A-C-B | Yes | Yes | Yes |
| B-A-C | No | No | No |
| B-C-A | No | No | No |
| C-A-B | Yes | Yes | Yes |
| C-B-A | No | Yes | No |
A set of clues can also have no solution. “A is before B” and “B is before A” cannot both hold in this left-to-right row with each distinct card used once. Faster arranging will not resolve the contradiction.
A different set may be incomplete rather than contradictory. “A is before B” alone leaves three valid orders. The missing information is not an error in the child’s work; it is a property of the clues.
For an older student, try a cycle: A before B, B before C and C before A. The first two place A before C, so the third conflicts. This explains the impossibility without testing every arrangement.
These three outcomes are distinct: one solution, several solutions, or no solution. Ask the student to name the outcome before choosing an answer. In writing, the same habit helps them recognise when a narrative gives enough chronology to infer an event order and when an inference needs qualification.
If the child treats “before” as “immediately before”, return to A-C-B and ask whether A is still to the left of B. That targets a language interpretation, not an arithmetic skill.
The Clementi Mathematics article offers a useful emphasis on understanding why a procedure is valid before practising it quickly. Here, the meaning of each clue and a stable checking routine should precede more complicated ordering tasks.
If the child finds one solution and claims it is unique, ask for a second attempt using the same clues. If they miss a contradiction, reduce the problem to the two opposing statements. Different errors need different repairs.
When a similar issue appears repeatedly in schoolwork, bring the exact question and one attempt to the teacher. Ask whether the difficulty lies in vocabulary, holding several conditions together or justifying completeness. Additional teaching can then be focused. One enjoyable three-card activity should not become a judgment about the child’s intelligence or need for tuition.
Where is Jalan Dermawan Playground?
NParks places it along Jalan Dermawan. Check the official navigation information and your approach separately.
Which play features are listed?
The description includes slides and a climbing frame. It does not guarantee their current condition or availability.
What are its listed opening hours?
The official directory says 24 hours. Check current notices and conditions before visiting.
Does before mean immediately before?
Not in this model. Before means anywhere earlier in the left-to-right row; immediately before adds adjacency.
Are the clues directions around the park?
No. They describe invented cards at home, not a surveyed route or an equipment sequence.
Sources and checking date
Official destination information checked on 14 October 2026. Invented teaching examples are labelled throughout. Recheck current notices before travelling.
- NParks: Jalan Dermawan Playground — location, description and listed hours.
- Secondary 1 Mathematics Tutor Clementi: Small Groups Tutorials — teaching reference for meaning before procedures; not a claim of a branch at this destination.