Wait, What? An Explanation Is Not a List of Facts
A Primary 2 pupil may know several facts about a topic and still struggle to explain it. Explanation requires the writer to organise those facts into a relationship: what causes what, what happens first, what changes next, and why the process produces the result.
Explanatory writing therefore answers questions such as how does this work? and why does this happen? The reader should finish with a clearer mental model, not just a longer fact list.
Facts become an explanation when the writer shows the mechanism that connects them.
Quick Answer
A practical Primary 2 explanatory-writing circuit is:
IDENTIFY THE HOW/WHY QUESTION → BUILD THE CAUSE OR PROCESS CHAIN → CHOOSE THE ESSENTIAL TERMS → PUT STEPS IN ORDER → SHOW RELATIONSHIPS WITH PRECISE CONNECTORS → CHECK FOR MISSING LINKS → REMOVE SIDE FACTS → TEST WITH A READER → TRANSFER.
The Official Singapore Primary-English Frame
Singapore’s English Language Syllabus 2020 for Primary develops writing and representing for different purposes and contexts. Explanatory writing supports this by helping pupils organise information, use precise vocabulary and communicate causal or procedural relationships. The teaching circuits below are eduKate scaffolds rather than official MOE formats.
Official reference: MOE English Language Syllabus 2020 Primary.
Layer 1: Start With a Bounded How or Why Question
Weak topic: “Plants”.
Better question: “How does a seed begin to grow?”
Another useful question: “Why do wet clothes dry faster in moving air?”
The bounded question controls which facts belong in the explanation.
Layer 2: Build the Mechanism Before Drafting
For “How does a seed begin to grow?” a simple mechanism map may be:
water + suitable warmth → seed coat softens/breaks → root grows downward → shoot grows upward → leaves open → young plant continues growing.
The map makes the relationship visible before sentence-level writing begins.
Layer 3: Sequence and Cause Are Different but Often Work Together
Sequence tells the reader what happens first, next and later. Cause tells the reader why one stage leads to another.
Example: “The seed absorbs water. As a result, the seed coat softens and the young root can begin to emerge.”
The explanation is stronger than “First the seed absorbs water. Next the root grows” because the relationship is visible.
Layer 4: Use Precise Connectors
- Cause: because, since.
- Result: so, as a result.
- Sequence: first, next, then, later, finally.
- Condition: if, when.
- Contrast: but, however at later readiness.
The connector should reveal a real relationship. Do not add therefore just because it sounds formal.
Layer 5: Technical Vocabulary Should Improve Precision
Age-appropriate technical words can make an explanation clearer.
- root;
- shoot;
- evaporate;
- surface;
- temperature;
- pollen;
- shadow;
- friction where appropriate to the child’s knowledge.
Teach the meaning before expecting the child to use the term. A precise word only helps if the writer understands it.
Layer 6: Explain Hidden Steps
Writers often skip a step because it feels obvious to them.
Weak: “The ice melts because it gets warmer.”
More complete: “When ice receives enough heat from its surroundings, its temperature rises. The solid ice then changes into liquid water.”
At Primary 2, the explanation should remain simple, but the relationship should not be invisible.
Layer 7: Remove Interesting Facts That Do Not Answer the Question
Question: “Why do we see shadows?”
Relevant: light travels from a source, an opaque object blocks some light, and a darker area appears behind it.
Interesting but not central: some streetlights are very tall.
Explanation quality improves when every detail serves the question.
Layer 8: Reader Testing Exposes Missing Links
After drafting, ask a reader who has not heard the original lesson:
- Can you tell what happens first?
- Can you tell what causes the next step?
- Is there a word you do not understand?
- Does any jump feel too large?
- Can you explain the process back to me?
If the reader cannot reconstruct the mechanism, the explanation needs repair.
Worked Explanation 1: How a Seed Germinates
A seed begins to germinate when it receives enough water and suitable warmth. The seed absorbs water, so its outer covering softens. A small root grows downward into the soil, while a shoot grows upward towards the light. Later, leaves open and the young plant can continue growing.
Why it works: the explanation stays on one process, uses sequence and cause, and includes precise but age-appropriate vocabulary.
Worked Explanation 2: Why Puddles Disappear
Question: Why does a puddle become smaller on a warm day?
Heat from the surroundings warms the water in the puddle. Some of the liquid water changes into water vapour and moves into the air. As more water evaporates, the puddle becomes smaller and may eventually disappear.
The explanation shows the mechanism instead of simply saying “The sun dries it.”
Worked Explanation 3: Why a Changed Plan Matters
Not every explanation is scientific. Language can explain decisions too.
The class moved the activity indoors because the outdoor path became slippery after heavy rain. By using the hall instead, pupils could continue the activity without walking across the wet area.
This is a causal explanation of a decision.
Worked Explanation 4: How a Message Reaches a Reader
Prompt: Explain how a written classroom reminder helps someone act correctly.
Possible explanation: “The writer first includes the important facts, such as the task, time and items needed. The reader uses those details to understand what to do. If the information is complete and clearly ordered, the reader can act without asking the writer for extra instructions.”
Mechanism Map Before Sentences
| Question | Mechanism notes |
|---|---|
| How does a shadow form? | light source → object blocks light → darker area behind object |
| Why does wet cloth dry? | water on cloth → water evaporates → less liquid remains |
| How does a message help? | writer selects facts → reader understands → reader acts |
| Why did the class move indoors? | rain → slippery path → safety concern → new location |
Common Explanatory-Writing Failures
| Visible problem | Likely cause | Repair |
|---|---|---|
| fact list with no mechanism | question not converted into chain | draw cause/process arrows first |
| sequence correct but why unclear | causal links missing | add because/so/as a result where true |
| technical words misused | vocabulary not understood | explain concept orally before writing |
| important step skipped | writer assumes reader knows it | reader test + identify jump |
| too many side facts | question control lost | ask whether each fact answers how/why |
| vague verbs | process language weak | replace does/goes/gets with exact action |
The First-Weak-Link Explanation Diagnostic
- Can the learner state the how/why question?
- Can the mechanism be explained orally?
- Can stages or causes be placed in order?
- Are the essential technical terms known?
- Can the writer show what connects each stage?
- Can irrelevant facts be removed?
- Can a reader reconstruct the explanation?
A Four-Week Explanatory-Writing Cycle
| Week | Focus | Receipt |
|---|---|---|
| 1 | How/why questions and mechanism maps | Child converts facts into relationships |
| 2 | Sequence, cause and connectors | Reader can follow what leads to what |
| 3 | Technical vocabulary and missing-link repair | Explanation becomes more precise |
| 4 | Reader testing and unfamiliar transfer | Child explains a new process with less prompting |
What Parents Can Ask
- What exactly are you explaining?
- What happens first?
- What causes the next step?
- Which word names the process precisely?
- Did you skip a step because it seems obvious to you?
- Does this fact actually answer the question?
- Could another person explain it back to you?
What Tutors Should Protect
- Mechanism before paragraph decoration.
- How/why question as the scope boundary.
- Sequence and cause should not be confused.
- Technical vocabulary must be understood.
- Missing links matter more than word count.
- Reader testing reveals hidden assumptions.
- Transfer across scientific and everyday explanations.
Student Explanation Receipt
- I can state the how or why question.
- I can build a process or cause chain.
- I can put stages in the right order.
- I can use because, so and sequence words accurately.
- I can use precise topic vocabulary.
- I can notice a missing step.
- I can remove facts that do not help.
- I can test whether a reader understands the mechanism.
- I can explain a new process without copying a model.
Unfamiliar Transfer Challenge
Give the learner a familiar phenomenon that has not been rehearsed in writing, such as “Why does a wet floor become dangerous?” or “How does a timetable help a traveller choose the right bus?” The learner must create a mechanism map first, then write six to eight sentences. A second reader should identify the cause/process chain without seeing the original planning notes.
The Primary 3 Bridge
Primary 3 increasingly uses English to explain knowledge learned in other subjects. A Primary 2 learner who can already turn facts into a mechanism is better prepared for reading-to-learn and writing-to-explain.
Continue to Primary 3 English Learning Guide | Explanatory Writing: How, Why, Cause, Process and Precision.
Continue the Primary 2 English Learning Guide
Evidence Boundary
The mechanism maps, reader tests, causal circuits and worked explanations in this guide are eduKate teaching scaffolds rather than official MOE assessment rubrics.
The Quiet Return
An explanation works when another reader can rebuild how or why something happens.
Ask the how or why. Build the chain. Name the process. Show what causes what. Remove side facts. Test the missing links. Then change the phenomenon and see whether the explanation still makes the mechanism visible.
