Punggol Science Tuition should teach Science command words because a student can know the concept and still answer the wrong task. “State,” “describe,” “explain,” “compare,” “suggest,” “calculate,” “justify” and “evaluate” may appear in similar topics, but they ask for different kinds of responses.
The core aim of Science command words in Punggol tuition is to help students recognise the job before they begin the answer. A command word should trigger an answering mode: a direct fact, a pattern, a mechanism, a comparison, a plausible proposal, a calculation route or an evidence-based judgement. Once that distinction becomes automatic, students write less irrelevant material and give answers that match the actual question.
Command Words Are Instructions, Not Decoration
Students often focus on the scientific nouns in a question and skim the command word. That creates a common mismatch: a correct topic answer that does not perform the required task.
Tuition should therefore make the command word one of the first things students identify.
The Core Aim: Recognise the Task Before Building the Answer
- State — give the required information directly.
- Describe — say what happens or what the evidence shows.
- Explain — give the scientific reason or mechanism.
- Compare — make the relationship between two cases explicit.
- Suggest — give a scientifically plausible response based on the information available.
- Calculate — show the quantitative route and result.
- Justify — give the reason why a choice or conclusion is supported.
- Evaluate — judge the strength, limitation or suitability using evidence.
State: Be Direct
A state question usually rewards concise retrieval.
Students should avoid turning every state question into a long explanation. The aim is relevance and precision.
Describe: Report the Pattern
Description focuses on what is observed, measured or shown.
In graphs, students should report the pattern before offering a causal explanation unless the question asks for both.
Explain: Give the Mechanism
An explanation answers why.
A useful structure is condition → scientific process or property → effect.
The mechanism is what separates explanation from description.
Compare: Mention Both Sides
A comparison is incomplete if only one case is described.
Students should compare the same feature across both conditions: greater than, lower than, increases while the other remains constant, or has a feature the other lacks.
Suggest: Stay Scientifically Plausible
Suggestion questions may allow more than one valid answer.
The response should still be constrained by the evidence, syllabus and scientific model.
Calculate: Show the Route
Calculation questions should include the relevant relationship, unit conversion where necessary, substitution, result and unit.
See Science Calculations.
Justify: Connect the Choice to Evidence or Principle
Repeating the selected answer is not justification.
Students should state why that option, method or conclusion is supported by evidence or scientific reasoning.
Evaluate: Judge With Criteria
Evaluation may involve reliability, accuracy, experimental limitations, suitability or evidence quality depending on level.
The response should identify the issue, explain why it matters and support the judgement.
Primary Science Command Words Should Be Introduced Gently
Primary students can learn the difference between “what happened?” and “why did it happen?” before memorising formal terminology.
The command-word vocabulary can grow around these distinctions.
PSLE Science Command Words Need Fast Recognition
By Primary 6, students should identify command words almost automatically so they can spend cognitive effort on the Science itself.
See PSLE Science Tuition.
Secondary Science Command Words Become More Nuanced
Secondary questions may combine commands or require evidence-based justification and evaluation.
Students should learn the response pattern without turning it into a rigid template.
Command Words Work With Question Analysis
The command word is only one part of the question.
Students also need to identify the changed condition, evidence, target object and scientific model.
See Science Question Analysis.
Command Words Work With Answering Techniques
Question analysis tells the student what is required. Answering technique helps express that response clearly.
See Science Answering Techniques.
Model Answers Can Show Command-Word Differences
Compare a model “describe” response with a model “explain” response to the same phenomenon.
Students can see how the task changes the answer structure.
A Command-Word Error Map
- State answer becomes unnecessarily long.
- Describe answer includes explanation but misses the pattern.
- Explain answer states only what happened.
- Compare answer mentions only one case.
- Suggest answer is not constrained by Science.
- Justify answer repeats the choice.
- Evaluate answer lists issues without making a judgement.
A Weekly Command-Word Routine
- One state question.
- One describe question.
- One explain question.
- One compare question.
- One suggest or justify question.
- One mixed question where the student names the command before answering.
Parents Can Support With One Simple Prompt
Ask: “What is the question asking you to do?”
That single prompt often prevents a large amount of irrelevant writing.
How the eduKate Ecosystem Connects
For open-ended construction, use Science Open-Ended Questions.
For correction patterns, see Science Test Corrections.
Frequently Asked Questions
Why are Science command words important?
They tell the student what kind of response the question requires.
What is the difference between describe and explain?
Describe states the pattern or observation; explain gives the scientific reason or mechanism.
How can students improve compare questions?
Mention both cases and compare the same feature explicitly.
Should students memorise templates for command words?
Simple structures help, but they should support understanding rather than replace it.
The Core Aim, in One Sentence
The core aim of Science command words in Punggol tuition is to make the task visible before the answer begins, so students respond with the right kind of scientific thinking instead of writing everything they know.
