🇸🇬 Free for every Singapore Primary student

Master Primary Science
from P3 to PSLE 2026

Quizzes, flashcards and complete study notes for every level — P3, P4, P5 and PSLE. Fully updated for the MOE 2026 PSLE Science syllabus — including the removal of Cells and new skills-based topics. No sign-up, no download, completely free.

Explore Levels → PSLE Practice 🔭
280+
Quiz Questions
41
Science Topics
4
School Levels
100%
Free
🌈
Primary 3
P3 Science
8 topics · 48+ quizzes
Start → 🔬
Primary 4
P4 Science
8 topics · 40+ quizzes
Start → 🌿
Primary 5
P5 Science
8 topics · 2026 syllabus
Start → 🔭
PSLE 2026
Full PSLE Prep
15 topics · 150+ quizzes
Start → 📜
Past Year Questions
PSLE 2019–2023
Booklet A & B with model answers
Practice → 🏆
Exam Strategy
How to Score AL1
12-week plan · Exam techniques · Keywords
Read → 🏷️
All Levels
Diagrams
Interactive labelling
Label → 🧪
All Levels
Fair Test
Experiment design
Design → 📊
All Levels
Data Skills
Graphs & interpretation
Practice →
🎯 New — Free Level Check
Not sure where to start?
Answer 15 questions → get a personalised study plan in 5 minutes.
Take the Level Check →

Singapore's Free Primary Science Learning Platform for P3, P4, P5 and PSLE

ScienceStar is built specifically for Singapore primary school students studying under the MOE 2026 Science syllabus. Whether your child is in Primary 3 just beginning their science journey, in Primary 4 building deeper understanding, or in Primary 5–6 preparing seriously for the PSLE Science examination, ScienceStar covers everything they need — completely free.

Unlike textbook reading or passive revision, ScienceStar makes learning active and engaging. Students earn XP points, maintain streaks, and receive instant feedback after every quiz question. Our smart flashcard system helps students focus on the topics where they need the most practice.

ScienceStar covers 39 science topics across four levels — from Diversity of Living Things and Magnets in P3, through Plant Reproduction and Electrical Systems in P4, right up to Forces, the Water Cycle and Photosynthesis at PSLE level. All content is aligned to the latest MOE primary science curriculum and updated for 2026.

Best of all, there is no registration, no subscription, and no download required. Open ScienceStar in any browser and start learning within seconds.

✅ All content updated for the MOE 2026 PSLE Science Syllabus (Cells removed · Energy Conversion added · Skills-based learning)
Choose Your Level

Complete Primary Science
from P3 right through to PSLE

Each level has its own dedicated app with topics, quizzes, flashcards and full study notes aligned to the 2026 MOE syllabus.

🌈
Primary 3
P3 Science
For 9-year-olds starting Science
  • 🦁Diversity of Living Things
  • 🌿Plant System
  • 🦋Animal Life Cycles
  • 🍄Fungi & Bacteria
  • 🧪Materials & Their Properties
  • 💡Light
  • 🌡️Heat
  • 🧲Magnets
Diversity
  • Living vs non-living things; characteristics of living things (MRS GREN)
  • Diversity of animals — vertebrates & invertebrates; classifying by features
  • Diversity of plants — flowering & non-flowering; parts and functions
  • Fungi and bacteria — characteristics, roles as decomposers
Life Cycles
  • Life cycles of insects: complete & incomplete metamorphosis
  • Life cycles of frogs, birds, mammals and plants
Materials
  • Properties: hardness, flexibility, transparency, water absorption, electrical conductivity
  • Choosing materials for specific purposes
Energy (Light, Heat & Magnetism)
  • Sources of light; reflection & refraction; transparent/translucent/opaque
  • Shadows — formation, size and shape; umbra & penumbra
  • Heat sources; conductors & insulators; heat transfer by conduction
  • Good/poor absorbers and emitters of heat
  • Magnets — poles, attraction/repulsion, magnetic materials, making magnets
⚡ P3 is foundation level — mastering these topics makes P4 & PSLE much easier!
Start P3 Science →
🔬
Primary 4
P4 Science
Building deeper understanding
  • 🌿Plant Parts & Functions
  • 🍎Human Digestive System
  • 🌸Plant Reproduction
  • 💧Matter & States of Change
  • 💡Light (advanced)
  • 🌡️Heat (advanced)
  • ⚡Electrical Systems
  • 🧲Magnets (advanced)
Systems
  • Plant parts: roots, stems, leaves, flowers — structure and function
  • Photosynthesis basics: what plants need and what they produce
  • Human digestive system: organs, enzymes, digestion & absorption
Reproduction
  • Flower parts and their roles in pollination & fertilisation
  • Seed dispersal methods: wind, water, animal, self-dispersal
  • Germination conditions; comparing sexual vs asexual reproduction
Matter
  • States of matter: solid, liquid, gas — properties and particle model
  • Changes of state: melting, boiling, evaporation, condensation, freezing
  • Water cycle components; factors affecting evaporation rate
Energy (Electricity, Light, Heat & Magnetism)
  • Electrical circuits: series & parallel; current, voltage, resistance
  • Conductors & insulators; switches; effects of changing components
  • Light: reflection laws, plane mirrors, periscopes; refraction
  • Heat: conduction, convection, radiation; thermal equilibrium
  • Magnets: magnetic field, induced magnetism, electromagnets
🔬 P4 introduces body systems and circuits — key building blocks for PSLE questions.
Start P4 Science →
🌿
Primary 5
P5 Science
Deeper concepts, exam skills
  • ⚡Energy Conversion
  • 🌸Reproduction in Plants & Animals
  • 🫁Respiratory System
  • 🫀Transport System
  • 💧Water Cycle
  • 🦁Adaptation & Survival
  • 🌿Food Chains & Food Webs
  • ⚗️Matter — Solids, Liquids & Gases
Energy
  • Forms of energy: kinetic, potential, light, heat, sound, electrical, chemical
  • Energy conversion and conservation; energy stores and transfers
  • Renewable vs non-renewable energy sources
Systems (Human Body)
  • Respiratory system: organs, gas exchange (O₂ in, CO₂ out), breathing mechanism
  • Circulatory/transport system: heart, blood, blood vessels — functions and pathway
  • Interaction between digestive, respiratory and circulatory systems
Reproduction
  • Sexual & asexual reproduction in plants; advantages of each
  • Reproductive organs in animals; internal & external fertilisation
  • Comparing reproduction strategies across different organisms
Interactions within the Environment
  • Food chains & food webs: producers, consumers, decomposers
  • Ecosystems; effects of removing organisms from food webs
  • Adaptations of plants and animals to their habitats
  • Water cycle: evaporation, condensation, precipitation, collection
Matter
  • Properties of solids, liquids and gases at particle level
  • Dissolving, mixtures, and methods of separation
🎯 P5 is where PSLE exam skills are built — expect more open-ended & application questions.
Start P5 Science →
🔭
PSLE 2026
Full PSLE Prep
Full exam preparation (P5–P6)
  • 🌞Photosynthesis
  • ❤️Respiratory & Circulatory
  • ⚡Electrical System
  • 🏋️Forces
  • 🌍Interactions in Environment
  • 🌧️Water Cycle
  • 🌺Plant Reproduction
  • ＋8 more topics
Diversity
  • Classification of living things (plants, animals, fungi, bacteria)
  • Characteristics used to classify — features, habitats, behaviours
  • Diversity of materials and their properties
Systems
  • Plant system: photosynthesis, transport of water & nutrients, gas exchange
  • Human digestive system: organs and functions, enzymes, absorption
  • Human respiratory system: breathing, gas exchange in lungs
  • Human circulatory system: heart, blood vessels, blood components & functions
  • Electrical systems: series & parallel circuits, voltage, current, resistance
Interactions within the Environment
  • Food chains, food webs — energy flow; producers, consumers, decomposers
  • Ecosystems: impact of changes; predator-prey relationships
  • Plant & animal adaptations: structural, behavioural, physiological
  • Water cycle: processes, human impact, conservation
Reproduction
  • Reproduction in flowering plants: pollination, fertilisation, seed dispersal
  • Asexual reproduction: vegetative propagation, advantages & disadvantages
  • Reproduction in animals: sexual vs asexual; life cycles
Energy
  • Forms of energy and energy conversions; law of conservation of energy
  • Heat: conduction, convection, radiation; good/poor conductors
  • Light: reflection, refraction, shadows; optical instruments
Forces
  • Types of forces: gravitational, magnetic, elastic, frictional, normal, air resistance
  • Effects of forces: change in speed, direction, shape
  • Balanced & unbalanced forces; applying Newton's ideas to everyday situations
Matter
  • States of matter and changes of state; particle model
  • Mixtures and methods of separation
  • Dissolving; factors affecting rate of dissolving
✅ Updated for 2026 — Cells topic removed. New emphasis on skills-based application & open-ended reasoning.
Start PSLE Science →
All Levels

Specialist Practice Tools

Targeted tools for the skills that really matter in the PSLE Science paper.

🏷️
Diagram Labelling
Interactive drag-and-click for every diagram tested in PSLE Science. Plant Cell, Digestive, Circuits & more.
Start labelling →
🧪
Fair Test Design
Design experiments step-by-step — variables, method, prediction and mark scheme. 10 complete experiments.
Start designing →
📊
Data Interpretation
Read graphs and tables, identify trends, explain anomalies and draw conclusions. 12 question sets.
Start practice →
📜
Past Year Questions
PSLE Science from 2019–2023. Booklet A MCQs and Booklet B open-ended with model answers.
Practice now →
Features

Everything your child needs
to love learning Science

Three powerful learning modes plus a gamified XP system that keeps students coming back every day.

🧠
Smart Quiz Mode
230+ MCQ questions with 30-second timers, instant answer explanations and fun science facts after every question.
🃏
Flashcard System
Flip-card animations for key facts. Mark cards as Got it / Unsure / Again to focus revision where it's needed.
📖
Full Study Notes
Comprehensive notes for all 39 topics with key vocabulary, bullet points and direct links to quizzes.
⭐
XP & Level System
Earn experience points, level up and maintain streaks. Makes studying feel like a game — children love it.
⏱️
Exam-Style Timer
30-second countdown per question. Timer turns red in the final 10 seconds — great exam pressure practice.
📴
Works Offline
Once loaded, the app works without internet — perfect for studying on MRT, in the car, or anywhere.
Science Explained

Learn the Concepts Behind the Topics

Our science articles explain the key ideas in plain language — perfect for exam preparation.

P5 / PSLE · Plants
How Plants Make Food: Photosynthesis Explained
A simple, step-by-step guide to photosynthesis for Singapore primary students.
P4 · Ecosystems
Food Chains vs Food Webs: Complete P4 Science Guide
Understand producers, consumers and decomposers with clear examples from the syllabus.
P4 / PSLE · Water
The Water Cycle Explained Simply for Singapore Students
Evaporation, condensation, precipitation — the full water cycle in plain English.
View All Science Articles →
Free PDF Tools
📄 New — Printable Revision Sheets

Free A4 Summary Sheets for Every Topic

One clean printable sheet per topic — key definitions, study notes and exam Q&As. Print at home, save as PDF, or share in your WhatsApp class group. All 21 topics, completely free.

Get Free Print Sheets →

PDF Tools for Students & Parents

Free PDF tools from our sister site to manage study notes and worksheets.

📄
Merge PDF
Combine multiple science worksheets or study notes into one neat PDF file.
Try free at rifixpdf.xyz →
🗜️
Compress PDF
Shrink big PDF worksheets so they're easy to share with teacher or parent via WhatsApp.
Try free at rifixpdf.xyz →
📝
PDF to Word
Convert PDF notes into editable Word documents so students can add their own annotations.
Try free at rifixpdf.xyz →
🏆

Want to score AL1?

Read our free AL1 Guide — 12-week study plan, exam techniques, must-know keywords and model answers for Booklet B.

Read the AL1 Guide →

Ready to start learning? 🚀

Free for every Singapore student. No sign-up. No download. Start right now.

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