International Junior Science Olympiad

The International Junior Science Olympiad (IJSO) is an annual individual and team competition in the Natural Sciences for students who are under sixteen years old on 31st December of the competition year. IJSO has been established in recognition of the significance of the Natural Sciences in the general education of young people and in all aspects of their lives. It is a purely educational event.

Our Aim

  • To promote and reward the pursuit of excellence in scientific endeavor.
  • To challenge, stimulate and encourage gifted students to further develop their talents in Natural Sciences.
  • To create friendship and relationships among students around the world from an early age.

Our Objectives

  • To stimulate the active interest of students in the Natural Sciences.
  • To promote their careers as scientists.
  • To enhance and develop international contacts in the Natural Sciences.
  • To promote future scientific collaboration.
  • To encourage the formation of friendships within the scientific community.
  • To offer the opportunity to compare the syllabi and educational trends in science education within the participating countries.


The syllabus of the International Junior Science Olympiad (IJSO) lists the skills and areas of knowledge the participants should be familiar with for this competition.
It thus serves as a guideline for developing tasks to the Scientific Committees of the hosting countries but should also help the leaders of the participating countries to effectively train their students for this competition. In order to keep the syllabus up to date it should be revalidated every three years and if necessary shortened or expanded.

Structure and content of the syllabus

The International Junior Science Olympiad is a general science competition. The IJSO syllabus is therefore not strictly divided into the disciplines biology, chemistry and physics but rather intends to highlight basic general concepts in science. This conceptual approach is also meant to encourage the development of problems of interdisciplinary content and relevance.

The content of the syllabus is based on:

  • The former syllabus of the IJSO.
  • The syllabi for students up to 15 years of age in the participating countries.
  • The problems given at the IJSO until the 5th IJSO in 2008.

Omissions and additions were made if considered suitable.

Remarks about problems given at the IJSO

More complex or additional topics may be investigated in the problems provided sufficient information to work on the questions is given in the problems themselves. This may include topics in science that are not listed below as well as the use of sophisticated apparatus in the experiments. The additional topics will not compose more than 10 % of any paper.

All Problems should be given using SI-units. If other units are used the conversion to SI-units should be explained. A list including all the natural constants used in the tests should be provided.

The experimental problems at the IJSO should only employ equipment that most of the students are familiar with and that may be found at schools. Furthermore they should not involve dissection of animals.

For more details, download IJSO Syllabus.

"The knowledge of anything, since all things have causes, is not acquired or complete unless it is known by its causes."
Iba Sina
Father of modern medicine