Did you know that a scientifically sensible explanation can still answer a different question from the one asked? When Science homework asks for an observation, start with what the child can see, measure or read from the given results. When it asks for an explanation, connect that evidence to the relevant scientific idea.
For Bukit Timah parents reviewing Primary Science or secondary Science tuition, try this small check: ask your child to underline the instruction, then say whether the answer needs a recorded result or a reason. Keep the first attempt. This helps the tutor see whether the difficulty lies in reading the task, understanding the concept or expressing the answer.
Bring one question and the child’s actual response to the next lesson. Ask the tutor to model the distinction, then give a fresh pair of questions on a topic already taught. Useful progress is the child choosing the right kind of response independently, rather than adding “because” to every Science answer.
Find your next learning step
Choose a short teaching check, then bring the first attempt to the tutor.
SECTION 1 OF 5
Separate the evidence from the reason
An observation reports something available to the observer: a colour changed, a reading increased or a measured length stayed the same. An explanation says why a result might occur using the relevant scientific relationship. An inference goes beyond direct observation to a conclusion supported by evidence. These are related moves, but they do different jobs.
A parent can draw two columns headed “What happened?” and “Why might it have happened?” Ask the child to sort two short sentences before writing a full answer. Use the information actually provided; an imagined change is not an observation.
SECTION 2 OF 5
Try an original worked example
Imagine a worksheet showing a metal rod’s length as 20.0 cm before heating and 20.1 cm after heating. An observation is: “The measured length increased by 0.1 cm.” An explanation, if thermal expansion has been taught and the context supports it, is: “The metal expanded when heated.”
The measurement and the proposed reason belong together when the task asks for both. If it asks only for a change in length, a long explanation can leave the requested numerical result unstated. Ask your child to identify exactly which sentence answers the instruction.
Contents · Previous section · Next section
SECTION 3 OF 5
Find the point where the answer changes job
Look at a real first attempt. Did the child write “it got hotter” although only length was measured? Did they name expansion without stating the change? Did they report a result accurately but struggle to explain it? Each response gives the tutor a different starting point.
Use a gentle prompt during teaching: “Which part can you read directly from the results?” Record that a prompt was needed. Later, try a fresh example without the prompt so the tutor can see whether the distinction has become usable.
Contents · Previous section · Next section
SECTION 4 OF 5
Build the explanation only after the observation is clear
Once the child has identified the result, ask which taught idea could account for it. A reason should connect to the particular situation. Listing scientific keywords without making that connection can produce a fluent sentence that does little explanatory work.
With older students, discuss what the evidence permits and what it leaves uncertain. One measurement does not automatically establish every proposed cause. The tutor should match that discussion to the course and question rather than impose an advanced investigation routine on a beginner.
Contents · Previous section · Next section
SECTION 5 OF 5
Bring a small, useful record to tuition
Keep the instruction, the original answer, one revised answer and a note about any help. Ask: “Can the next practice distinguish recording a result from explaining it?” This gives the lesson a clear target without creating another large homework set.
eduKateSG’s 3-pax Mathematics teaching guide shows the value of inspecting the exact reasoning step. Apply that diagnosis-first principle when discussing Science support, and confirm the subject programme separately. A Mathematics lesson is not evidence of a Science tuition offering.
Contents · Previous section · Series guide
Continue with the closest question
- Read graph scales accurately
- Select the right data-table entry
- Review Science explanations and practical skills
- Bukit Timah tuition decision guide
- Bukit Timah tuition hub
- eduKateSG’s 3-pax Mathematics teaching guide
Match the practice to the course
For Primary and PSLE practice, use the child’s actual teaching coverage and task instructions. In secondary school, PG1–PG3 are Posting Groups; G1–G3 are subject levels. Match support to the individual subject and examination year. See MOE’s Posting Groups guide and SEAB’s SEC information.
Reviewed 11 October 2026. Examples are original teaching illustrations. Home checks are suggestions to discuss with the teacher or tutor; they do not prescribe examination marking rules or promise results.
Arrange a parent–student consultation after the starting position is clear. Bring the task, first attempt and the point where help was needed.