International Equilibrium Science Olympiad (IESO)
International Equilibrium Science Olympiad (IESO) strives to be a prestigious global platform celebrating excellence in science while
nurturing futurE thinkers, problem solvers, and leaders. It fosters collaboration, innovation, ethical conduct, accessibility, diversity, and lifelong learning.
Guided by the SOLO taxonomy, IESO ensures a progression from surface- level understanding to deep, extended abstract thinking. By aligning with Higher-Order Thinking Skills (HOTS), the Olympiad challenges participants to analyze, evaluate, and create solutions, fostering critical thinking and innovation.
The ISO is committed to developing globally competent, ethical, and innovative thinkers equipped to tackle the scientific challenges of the 21st century.
THE IESO AIMS TO:
cultivate scientific excellence by engaging students in meaningful, real-world challenges
encouraging students to address real-life problems with creativity and adaptability
empowers learners to develop a comprehensive grasp of scientific concepts and their application
The International Equilibrium Science Olympiad (IESO) fosters a dynamic platform to challenge young minds across critical scientific domains. With a focus on Life Science, Physical Science, and Applied Science, the IESO aims to inspire innovative thinking, critical problem-solving, and global competency.
For details, please refer to images below:
What to prepare for online competition?
What to prepare for online exam?
Exams are monitored through a camera system integrated into the exam platform. Students must use a device with an active, functioning camera and mic with stable internet connectivity throughout the exam. Meanwhile, the exam portal will also record the candidate screen activities for exam security during the exam. So you have to make sure your device, browser, internet connection, camera and screen sharing meet the technical requirements and are properly set up for a smooth and uninterrupted exam experience.
Exam Rules
IESO 2026 Heat Round Important Info
System will open from 10am – 9pm on competition days. Candidate must submit answers before 9pm.
Fee is RM90 per candidate
Category: Grade 1 to Grade 12 (Primary 1 to A-Levels/STPM)
** Candidate will join as below:
Paper A is for Primary 1 & 2
Paper B is for Primary 3 & 4
Paper C is for Primary 5 & 6
Paper D is for Secondary 1/Form 1/Year 7
Paper E is for Secondary 2/Form 2/Year 8
Paper F is for Secondary 3/Form 3/Year 9, Junior Secondary/Form 4/Year 10 & Senior Secondary/Form 5/Year 11.
Language Of Paper: English, Chinese & Malay (within the same question)
Total Number Of Questions: 25 Multiple Choice questions
Time allowed to answer questions: 60 minutes
AWARDS
Students who won Gold/Silver/Bronze are qualified to enter IESO Final round. Further details, please refer to IESO Final Round tab.
Top-performing students in the heat or national rounds receive the following awards based on their performance:
• Gold Medal + Certificate of Recognition: Awarded to students who achieve 80% or more correct answers.
• Silver Medal + Certificate of Recognition: Awarded to students who achieve 60% or more correct answers.
• Bronze Medal + Certificate of Recognition: Awarded to students who achieve 40% or more correct answers.
• Merit Certificate: Awarded to students who achieve 20% or more correct answers.
• Certificate of Participation: For those who achieve below 20% correct answers.
Sample questions are available for reference.
Please take note:
- There is no replacement exam under any circumstances of absentee.
- No fee will be refund.
- No reschedule of exam.
- Please join the exam on the date and time allowed only.
- The organizing committee reserved the final decision-making rights on all disputes.
Registration close on 12-April-2026, 11pm.
IESO Final Round 2026
Students who are eligible to compete for the International/Final Rounds are those who garnered Gold, Silver and Bronze Medals in the IESO 2026 Heat Round. Participation in the International Round is voluntary in nature. Registration fee and details will be announced together with Heat Round result.
There are 2 options available.
Student can join PhIMO Final Round 2026 either
Face to face at Clark, Pampanga Philippine from 4th September 2026 to 7th September 2026.
or
Online competition at home on 5th September 2026, morning. Actual time to be confirmed.
Details will send to candidates who are qualifies. Please refer to registration form when registration is open.
Group Tour Itinerary
19th September 2025 Day 1: Arrival & Registration
Airport: MACTAN International Airport, Philippines.
20th September 2025 Day 2: Exam Day
21st September 2025 Day 3: Awarding Ceremony
Attire for attending the award ceremony is Traditional clothing.
22nd September 2025 Day 4: Go Home
What are included and not included in group tour?
IESO 2025 Final Round Review
There are 3 online training sessions by IESO International Team.
Discussions are in English.
Discussions are for both Face to Face and Online students.
Please take note:
- There is no replacement exam under any circumstances of absentee.
- No fee will be refund.
- No reschedule of exam.
- Please join the exam on the date and time allowed only.
- The organizing committee reserved the final decision-making rights on all disputes.
Registration close on to be announced.
IESO 2025 Final Round registration is closed.