If your child is sitting for the PSLE in 2026, they belong to a special cohort, the first group of students to take the PSLE Science exam entirely under the revised syllabus that MOE introduced in 2023.
This isn’t a minor tweak. The changes affect what topics are tested, how the exam paper is structured, and, most importantly, what skills your child needs to demonstrate to score well. Parents who are still using assessment books and past papers from 2024 or earlier may find that some content no longer applies, while new expectations have been introduced that those older resources don’t cover.
This article explains exactly what has changed, why it matters, and how you can make sure your child is preparing for the right exam.
The Big Picture: Why MOE Revised the Science Syllabus
The previous primary Science syllabus had been in place since 2014. While it served students well for nearly a decade, MOE recognised that the world has changed significantly, and Science education needed to keep pace.
The 2023 revision is built around three core principles that MOE calls the “3 INs”:
Inspire, Students should develop a genuine fascination with Science, seeing its relevance to real-life problems rather than treating it as a subject to memorise for exams.
Inquire, The art of scientific inquiry should be embedded into every classroom. Students should learn to evaluate claims critically, based on evidence and logical reasoning.
Innovate, Students should be able to apply Science to generate creative solutions to real-world problems, building a foundation for future STEM careers.
In practice, this means the 2026 PSLE Science exam places significantly less emphasis on rote memorisation and significantly more emphasis on understanding, reasoning, and application. Your child doesn’t just need to know that metals conduct heat, they need to be able to explain why a metal spoon feels colder than a wooden spoon at room temperature, even though both are the same temperature.
What Topics Have Changed?
The five main themes of the primary Science syllabus remain the same: Diversity, Cycles, Systems, Interactions, and Energy. These themes span both Life Science and Physical Science, and they form the backbone of everything tested from Primary 3 to Primary 6.
Within these themes, however, several important changes have been made.
Topics Removed
Cells has been removed from the Primary 5 syllabus. This is the most widely discussed change. Previously, upper primary students needed to learn about cells, including terms like cytoplasm, cell membrane, and nucleus. Under the revised syllabus, this topic is no longer examinable at PSLE.
The removal isn’t because cells aren’t important, students will encounter them again in Secondary Science. The reasoning is that the primary-level treatment of cells was heavily reliant on memorisation of technical terms, which didn’t align with MOE’s broader shift towards understanding and application. Removing it frees up curriculum time for deeper exploration of other topics.
Specific force terminology has been simplified. Primary 6 students are no longer required to use the terms “air resistance” and “water resistance” when discussing the interaction of forces. They still need to understand the concepts, but the focus has shifted from recalling precise terminology to demonstrating conceptual understanding.
Topics Restructured
Under the previous syllabus, topics were grouped into a lower block (P3-P4) and an upper block (P5-P6), and schools had flexibility to teach topics from either year within the block. This sometimes led to inconsistencies, a student transferring schools might find they’d covered some topics twice while missing others entirely.
The 2023 revision introduces a fixed sequence of topics for each level. Every primary school now follows the same progression, ensuring consistency nationwide. This means parents can be much clearer about exactly what their child should have learned by each stage.
Here’s a simplified overview of how key topics are distributed:
Primary 3-4 (Lower Primary Science):
- Diversity of living and non-living things
- Life cycles of plants and animals
- Plant systems (parts and functions)
- Human systems (digestive system)
- Magnets
- Light and heat energy
- Matter and its states
Primary 5-6 (Upper Primary Science):
- Water cycle and changes of state
- Reproduction in plants
- Respiratory and circulatory systems (human and plant)
- Electrical systems
- Forces (friction, gravity, springs)
- Photosynthesis
- Interactions within the environment
- Energy conversion
The key point for parents: the PSLE tests content across all four years (P3 to P6), not just P6 topics. A student who didn’t fully grasp the P3 concept of life cycles or the P4 concept of heat transfer will lose marks in the PSLE just as surely as one who struggles with P6 topics like electrical systems.
The Biggest Shift: Science Practices
If there’s one change that will affect your child’s PSLE Science score more than any other, it’s the increased emphasis on Science Practices, also known as process skills.
Under the revised syllabus, students are explicitly expected to demonstrate these skills:
Observing, Identifying specific details from diagrams, tables, experimental setups, or descriptions. Observations must be factual and specific, not interpretations.
Comparing, Identifying similarities and differences between two or more items or scenarios. Both items must be addressed, writing about only one will not earn the comparison mark.
Classifying, Grouping items based on shared properties. The grouping criterion must be clearly stated.
Inferring, Drawing conclusions from observations. Unlike observing (what you can see), inferring requires explaining what the observation means or suggests.
Predicting, Using existing knowledge and patterns to forecast what will happen in a given scenario. Predictions must be supported by reasoning.
Communicating, Expressing scientific ideas clearly and accurately, using appropriate scientific keywords and logical structure.
These skills have always been part of Science education, but the 2026 PSLE will test them more explicitly and more frequently than before. Booklet B questions will increasingly require students to demonstrate a specific process skill, not just recall a fact, but observe, infer, compare, or predict based on given information.
What This Means in Practice
Here’s an example of how the same topic might be tested differently under the old and new emphasis.
Old-style question (recall-focused): “Name the process by which green plants make food.” Answer: Photosynthesis.
New-style question (process skill-focused): “Two identical plants were placed in different conditions. Plant A was placed near a sunny window. Plant B was placed in a dark cupboard. After two weeks, Plant A had grown taller and had green leaves, while Plant B had turned yellow and wilted. Using the information above, explain why Plant B wilted.”
This question requires the student to observe (identify differences between the two plants), infer (connect the lack of sunlight to the inability to photosynthesise), and communicate (express the explanation using scientific keywords like “photosynthesis,” “sunlight,” “food/glucose,” and “energy”).
A student who has memorised the definition of photosynthesis but hasn’t practised applying it to unfamiliar scenarios will struggle with this type of question. A student who understands the concept deeply and can reason through it will score full marks.
The 2026 Exam Format: What’s Changed
The PSLE Science exam is still one written paper comprising two booklets, completed in 1 hour 45 minutes, for a total of 100 marks. But the distribution of marks between the two booklets has shifted.
Booklet A (Multiple-Choice Questions)
2026 format: 30 MCQs × 2 marks = 60 marks
This is an increase from the previous format, which had 28 MCQs worth 56 marks. The additional MCQs and higher mark allocation mean Booklet A now carries more weight in determining your child’s overall Science grade.
Don’t be fooled into thinking MCQs are “easy marks.” The 2026 MCQs are increasingly experiment-based. Students must analyse data tables, graphs, experimental setups, and observations to select the correct answer. Questions are designed to test whether your child can interpret scientific information, not just recognise memorised facts.
Each MCQ is worth 2 marks, a significant amount. Getting careless with MCQs can cost your child dearly. If they rush through Booklet A and make five avoidable errors, that’s 10 marks gone, potentially the difference between AL2 and AL4.
Booklet B (Structured Questions)
2026 format: 10–11 structured questions = 40 marks
This is a decrease from the previous format, which had 12–13 open-ended questions worth approximately 44 marks. Fewer questions, but each one carries more weight, typically 2 to 5 marks per question.
The most significant change in Booklet B is the shift from purely “open-ended” questions to more structured questions. Structured questions guide the student’s response more explicitly, they might ask for a specific observation, then a separate explanation, then a prediction. This format rewards students who can answer precisely and concisely, rather than writing long, rambling responses that may or may not contain the required keywords.
What This Format Change Means for Preparation
The higher weightage on Booklet A means your child must be disciplined and accurate with MCQs, every question counts. Practise eliminating wrong options systematically rather than guessing.
The reduced but heavier Booklet B means each structured answer carries more marks. Getting one question completely wrong has a bigger impact than before. Students must be trained to answer with precision: use scientific keywords, refer to the specific context of the question, and structure their response to address exactly what is being asked.
The 5 Most Common Mistakes Students Make in PSLE Science
Based on our experience at BrightMinds, these are the errors we see most frequently, and they’re all avoidable with the right preparation.
1. Confusing Observations With Inferences
When a question asks “What do you observe?”, the answer must describe something directly visible or measurable, like “Plant A grew 5 cm taller than Plant B.” Students who write “Plant A grew taller because it received more sunlight” are making an inference, not an observation. That answer would score zero for an observation question, even though the reasoning is correct.
The fix: teach your child to clearly distinguish between what they can see (observation) and what they can conclude (inference). Practise labelling each type when reviewing past papers.
2. Missing Scientific Keywords
PSLE Science markers award marks based on the presence of specific scientific keywords in the answer. A student who writes “the plant uses sunlight to make food” may not get full marks. A student who writes “the plant carries out photosynthesis, using sunlight as a source of energy to produce food (glucose)” will.
The fix: for every topic, your child should have a list of essential keywords and practise incorporating them naturally into their written answers.
3. Not Answering in Context
When a question refers to a specific diagram, experiment, or scenario, the answer must reference that specific context. Writing a generic textbook answer, even if it’s scientifically accurate, may not address what the question is actually asking.
For example, if a question shows a diagram of a specific electrical circuit and asks why the bulb doesn’t light up, the answer must reference the specific issue visible in that circuit (like a gap in the wire), not a general explanation of how circuits work.
The fix: train your child to start answers with phrases like “In this experiment…” or “Based on the diagram…” to anchor their response to the given context.
4. Providing Incomplete Comparisons
When a question asks your child to compare two things, both items must be mentioned. Saying “Plant A grew taller” is incomplete. The correct answer is “Plant A grew taller than Plant B” or “Plant A grew 5 cm while Plant B grew only 2 cm.”
The fix: whenever your child sees the word “compare,” “difference,” or “similarity,” they should check that their answer mentions both items being compared.
5. Writing Too Much (or Too Little)
Some students write paragraph-length answers for 2-mark questions, burying the key point in unnecessary detail. Others write a single vague sentence for 4-mark questions, leaving marks on the table. The mark allocation is a direct guide to how much detail is expected.
The fix: a practical rule of thumb is one key point per mark. A 2-mark question needs two distinct pieces of information. A 4-mark question needs four. Practise calibrating answer length to mark value.
How to Prepare Your Child for the 2026 PSLE Science Exam
Use Current Materials
If you’re using assessment books or past papers, check the publication date. Resources published before 2023 may include topics that are no longer examinable (like Cells) and may not reflect the updated emphasis on Science Practices. Use materials designed for the 2023 syllabus onwards.
Revise All Four Years
The PSLE tests content from Primary 3 to Primary 6. Don’t make the mistake of revising only P5-P6 topics. P3-P4 concepts like life cycles, magnets, light, and heat are regularly tested and often combined with upper primary concepts in application questions.
Mind maps that show connections across themes, for example, how energy is involved in photosynthesis (P5), electrical systems (P5), and heat transfer (P4), help your child see Science as an interconnected whole rather than a set of isolated topics.
Practise Process Skills Explicitly
Don’t just practise answering Science questions, practise specific process skills. Set aside sessions dedicated to:
- Observation practice (describing what a diagram shows without interpreting)
- Inference practice (explaining what observations suggest)
- Prediction practice (forecasting outcomes based on patterns)
- Comparison practice (structured comparisons with both items addressed)
Focus on Booklet B Answering Technique
Knowing the Science content is only half the battle. Your child also needs to know how to express that knowledge in a way that earns marks. This means using scientific keywords, answering in the specific context of the question, addressing every part of a multi-part question, and calibrating response length to mark allocation.
At BrightMinds, our Science revision course specifically trains students in these techniques. We teach students how to differentiate between acceptable scientific answers and unacceptable non-scientific answers, how to analyse various exam questions and recognise the key concepts and skills involved, and how to use proper scientific keywords in their responses.
Don’t Neglect Booklet A
With 60 marks now riding on MCQs, Booklet A deserves serious preparation time. Practise timed MCQ sets to build speed and accuracy. For every question your child gets wrong, don’t just check the correct answer, understand why each wrong option is wrong. This builds the elimination skills that are essential for tricky MCQs where two options look plausible.
What BrightMinds Offers for PSLE Science
Our PSLE Science revision course is specifically designed for the 2026 syllabus and exam format. Here’s what your child will receive:
Comprehensive P3-P6 revision notes and mind maps that cover all five themes and highlight the connections between topics. These aren’t photocopied from assessment books, they’re prepared in-house by our Science teacher and updated annually to reflect syllabus changes.
Intensive open-ended question practice focused on Booklet B answering techniques. Students learn to analyse what each question is really asking, identify the correct process skill being tested, and construct answers that include all the required scientific keywords.
Over 100 common Science misconceptions covered during the course. These are the specific errors that students make year after year, confusing heat with temperature, mixing up conductors and insulators, misunderstanding food chains, and we address each one explicitly so your child doesn’t fall into the same traps.
Practice papers aligned to the 2026 exam format, with the updated Booklet A and Booklet B mark distribution, so your child walks into the exam hall having already experienced the format they’ll face.
As one of our former students, Choong Syin Yu from Chongfu School, shared: “The PSLE revision course was perfect. I will revise the Science mind-maps, notes on common misconceptions and mistakes, and practice papers before the PSLE exams. The revision materials were more than sufficient.” She scored A* in PSLE Science.
The PSLE Science exam is on 29 September 2026. There’s still time to prepare, but the earlier your child starts, the more confident they’ll be.