IJSO 2025

Dear friends,

We invite you to take part in an open online Olympiad — the Invitational Stage of the All-Russian Olympiad for School Students.

✅ Participation is free of charge. Teachers, parents, and anyone interested are also welcome to try solving Olympiad problems.

📅 April 16 – May 22, 2026 (online, via the Sirius.Courses platform).
📚 Subjects: Mathematics, Computer Science (programming, AI, robotics, information security), Physics, Chemistry, Biology, Astronomy.
Tasks are available in both Russian and English.

📋 Schedule:
• Astronomy: April 16–17, 2026
• Physics: April 21–22, 2026
• Chemistry: April 23–24, 2026
• Biology: April 28–30, 2026
• Mathematics: May 13–15, 2026
• Informatics: May 18–22, 2026

🔗 Registration: siriusolymp.ru (deadline: 6:00 PM Moscow time on the final day of the respective subject tour)

🌟 This competition is where students first encounter the world of Olympiads and Russia’s talent development system. The Olympiad is international — students from different countries solve the same problems on equal footing, exchange experiences, and prepare for future international competitions.

📊 After the Olympiad ends, we are ready to provide participant protocols and result statistics for your country upon request.

Let’s work together to identify and develop talented children and youth! 🚀

Дорогие друзья!

Мы приглашаем вас поучаствовать в открытой олимпиаде — пригласительном этапе Всероссийской олимпиады школьников.

✅ Участие бесплатное. Учителя, родители и все желающие также могут попробовать свои силы в решении олимпиадных задач.

📅 16 апреля — 22 мая 2026, онлайн на платформе «Сириус.Курсы».
📚 Предметы: математика, информатика (программирование, ИИ, робототехника, информационная безопасность), физика, химия, биология, астрономия. Задания доступны на русском и английском языках

📋 Расписание:
• Астрономия: 16–17 апреля 2026 г.
• Физика: 21–22 апреля 2026 г.
• Химия: 23–24 апреля 2026 г.
• Биология: 28–30 апреля 2026 г.
• Математика: 13–15 мая 2026 г.
• Информатика: 18–22 мая 2026 г.

🔗 Регистрация: siriusolymp.ru (до 18:00 МСК последнего дня тура по соответствующей дисциплине)

🌟 Именно на этом соревновании школьники знакомятся с олимпиадным движением и российской системой развития талантов. Олимпиада международная — ребята разных стран решают задачи на равных, обмениваются опытом и готовятся к дальнейшим международным состязаниям.

📊 По окончании Олимпиады мы готовы по запросу предоставить протоколы участников и статистику результатов Вашей страны.

Давайте вместе работать над выявлением и развитием талантливых детей и молодёжи! 🚀

What IJSO looked like — watch the final video

A week of science, international collaboration, interdisciplinary challenges, inspiration, and bright discoveries has come to an end in Sirius.

Congratulations to all winners and medalists of the International Junior Science Olympiad. We wish all participants further victories and new milestones!

Watch how it all unfolded 🎥

🌍 The Olympiad is over — time to share your impressions!

The IJSO 2025 week in Sirius has come to an end. Behind us are challenging tests, new friendships, and inspiring discoveries.

We spoke with Matias Andino Castellanos from the Republic of Costa Rica — a bronze medalist of the Olympiad. What did he think about the tasks and his experience in Sirius? Watch the interview in the video.

And now it's your turn — tell us what you'll remember most about this Olympiad in the comments!

The International Junior Science Olympiad has come to an end, but the journey of discovery continues 🧪
You can read more about the final days of the Olympiad in the diaries on our website.

To become future scientists and innovators, it’s important to keep growing, exploring new ideas, and practicing scientific thinking every day.

We’re sharing the final set of questions from our “Fact or Fiction?” series.

Today’s topic is chemistry! Test your knowledge of the laws of nature — answer the questions and share them with your friends💡

Congratulations to the winners and medalists of the International Junior Science Olympiad 2025 🏆

IJSO 2025 in Sirius has come to an end — but for its participants, this is only the beginning. Over the past week, students from more than 20 countries completed the experimental, theoretical, and MCQ rounds, each combining tasks in physics, chemistry, and biology. Today, we are pleased to share the final results.

Team ranking
🥇 Gold — Russian Federation
🥈 Silver — Russian Federation
🥉 Bronze — Chinese Taipei

🏆 Best team of IJSO 2025 — Russian Federation

Artem Akimov
Danila Besedin
Ivan Ermolaev
Artem Eremin
Arsenii Gasanenko
Anna Mikhailova

👑 Overall winner of IJSO 2025
Arsenii Gasanenko

🥇 Gold medals

Russian Federation — 7
Chinese Taipei — 4
Republic of India — 2
Kingdom of Thailand — 1

🥈 Silver medals

Russian Federation — 2
Republic of Azerbaijan — 4
Republic of Kazakhstan — 3
Hungary — 2
Socialist Republic of Vietnam — 3
Republic of Uzbekistan — 1
Republic of Indonesia — 1
Republic of India — 4
Kingdom of Thailand — 5
Chinese Taipei — 2

🥉 Bronze medals

State of Qatar — 2
Republic of Uzbekistan — 3
Republic of Azerbaijan — 2
Republic of Colombia — 3
Republic of Iraq — 1
Kyrgyz Republic — 1
Republic of Indonesia — 5
Republic of Kazakhstan — 3
Socialist Republic of Vietnam — 3
Hungary — 4
Republic of Tajikistan — 1
Republic of North Macedonia — 4
Republic of Costa Rica — 1
Islamic Republic of Pakistan — 1
People’s Republic of Bangladesh — 6
Sultanate of Oman — 1
Kingdom of Saudi Arabia — 1

Congratulations to all participants!

Your dedication, curiosity, and passion for science have made this year’s IJSO unforgettable. May this experience inspire great discoveries ahead.

IJSO 2025 was organized by the Ministry of Education of the Russian Federation, the Talent and Success Educational Foundation, and the Moscow Institute of Physics and Technology, with support from the administration of the Sirius Federal Territory.